D00788500B
IEEE 1394 Interface Powered Mixer
INSTALLATION & SUPPORT GUIDE
This appliance has a serial number located on the rear panel. Please record the model number and serial number and retain them for your records. Model number Serial number
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
IMPORTANT SAFETY INSTRUCTIONS
7 Read these instructions. Keep these instructions. Head all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturers instructions. 8 Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 9 Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. Grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 10 Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. 11 Only use attachments/accessories specified by the manufacturer. 12 Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
13 Unplug this apparatus during lightning storms or when unused for long periods of time. 14 Refer all serving to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. Do not expose this apparatus to drips or splashes. Do not place any objects filled with liquids, such as vases, on the apparatus. Do not install this apparatus in a confined space such as a book case or similar unit. The apparatus draws nominal non-operating power from the AC outlet with its POWER switch in the off position.
TASCAM AV-452 Installation & Support Guide
IMPORTANT SAFETY PRECAUTIONS
IMPORTANT (for U.K. Customers)
DO NOT cut off the mains plug from this equipment. If the plug fitted is not suitable for the power points in your home or the cable is too short to reach a power point, then obtain an appropriate safety approved extension lead or consult your dealer. If nonetheless the mains plug is cut off, remove the fuse and dispose of the plug immediately, to avoid a possible shock hazard by inadvertent connection to the mains supply. If this product is not provided with a mains plug, or one has to be fitted, then follow the instructions given below: IMPORTANT: The wires in this mains lead are coloured in accordance with the following code: GREEN-AND-YELLOW BLUE BROWN : EARTH : NEUTRAL : LIVE

For U.S.A

TO THE USER
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residental area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. CAUTION Changes or modifications to this equipment not expressly approved by TEAC CORPORATION for compliance could void the users authority to operate this equipment.

WARNING: This apparatus must be earthed. As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug proceed as follows: The wire which is coloured GREEN-and-YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or coloured GREEN or GREEN-and-YELLOW. The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK. The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED. When replacing the fuse only a correctly rated approved type should be used and be sure to re-fit the fuse cover. IF IN DOUBT CONSULT A COMPETENT ELECTRICIAN.
For the consumers in Europe WARNING This is a Class A product. In a domestic environment, this product may cause radio interference in which case the user may be required to take adequate measures. Pour les utilisateurs en Europe AVERTISSEMENT Il sagit dun produit de Classe A. Dans un environnement domestique, cet appareil peut provoquer des interfrences radio, dans ce cas lutilisateur peut tre amen prendre des mesures appropries. Fr Kunden in Europa Warnung Dies is eine Einrichtung, welche die Funk-Entstrung nach Klasse A besitzt. Diese Einrichtung kann im Wohnbereich Funkstrungen versursachen ; in diesem Fall kann vom Betrieber verlang werden, angemessene Manahmen durchzufhren und dafr aufzukommen.
TASCAM AV-452 Installation & Support Guide 3

Table of Contents

1 Introduction
AV installation features...5 About this manual....5 How the manual is organized...6
2 General installation notes
Physical installation...7 Power supply...7

3 Front panel features

Microphone channels...8
AV control and selection section.. 8

Main control section...9

4 Remote control unit features
Learning command codes...11

5 Rear panel connections

Video connections...12 AV audio and microphone connections..13 Master audio connections..14 External control connectors..15
6 Customization and settings
LEARN IR (switch 1)... 16 CASCADE (switch 2)... 17 SPEAKER OUT (switch 3)... 17 MIC HPF (switch 4)... 17 INTERCOM GATE (switch 5)... 17 AV DUCKER (switch 6)... 17

7 External control

AV-452 serial protocol...18
Serial port pinouts... 18

Relay control port...19

IR blaster.... 19 RELAY CONTROL pinouts... 19
8 Specifications and block diagram
Video specifications...20 AV audio and microphone specifications...20 Master section specifications...21 Audio performance...21 Power and physical specifications..22 Dimensional drawing...22 Block diagram...23
4 TASCAM AV-452 Installation & Support Guide
The TASCAM AV-452 coordinates the audio/visual needs for presenters of all levels. Functionally, the AV-452 serves as a microphone mixer, A/V receiver, and power amplifier into one compact unit. The control surface is elegant and intuitive. puts. Switching is done in parallel, and video switching is handled for composite and S-Video inputs.
Audio: Four microphone inputs (with phantom
power) offer plenty of inputs for multiple presenters, or multiple speaking positions. Up to two audio and three audio/visual components can be connected to the A/V channel, with simple switching control. A 3-band EQ is available on each channel to enhance the individual sounds as needed.
Control: The RC-452 universal learning remote is included with the AV-452, allowing the presenter to operate all the key equipment with a single remote. The RC-452 will control the AV-452, and can learn commands for projector power, and transport commands for up to four components.
The AV-452 itself also can learn IR commands, to integrate projector/monitor switching with the AV-452 internal switching. This IR command set can be transmitted with an IR blaster (not included) to the 37-pin D-sub RELAY CONTROL port (see "Relay control port" on page 18 for details).
Video: The AV-452 will perform video switching
between three A/V components, offering a single video feed for projectors or monitors with limited in-

AV installation features

Special additional features of the AV-452 relevant to fixed installation: Microphones can be connected using either XLRtype connectors or using a barrier strip and can be phantom powered, allowing the use of miniature condenser or PZM (boundary field) microphones. Switchable 80 Hz bass roll-off to eliminate lowfrequency rumble. Microphone insert loop for parametric EQ, compresser/limiter/gate, etc. AV signal dimmer to allow manual voiceovers, etc. Automatic AV ducker with adjustable ratio and threshold settings. A CV (constant voltage) paging system can be connected (12V, 24V or 70V) to the rear panel. A level control and defeatable noise gate are provided for optimal settings. A building alarm system can be connected to the EMG input. When the alarm sounds, the AV-452 will mute local audio, and switch the CV paging input on. The speaker and line output have independent mono switches for use in single-zone or multi-zone systems. Cascade input can be configured to combine the input as a submixer, or operate as "room cascade", allowing the AV-452 to become a drone amp. Dedicated unbalanced MEETING OUT jacks, together with balanced LINE OUT jacks allow for connection with other equipment. Serial (RS-232) and relay (37-pin D-sub) connectors allow for control of the unit by other devices.

About this manual

This manual is intended for use by those designing, installing and supporting the AV system including the AV-452. It is not necessary for the everyday user of the equipment to read this manual. The user should refer to the single-sheet Operation Guide for a quick reference on how to operate the unit. However, a brief guide to the front panel, and remote control unit is given here, and this also provides some information which can be used when introducing the operation of the unit to its users. We suggest that the Operation Guide is kept close to the AV-452, and the spaces on this sheet are filled in, for a written record of the permanent connections made between the AV-452 and other equipment. Note that controls and connectors on the unit and the remote control unit are written in this typeface: LINE OUTPUT. Sometimes a control or connector is referred to by a number, corresponding to the numbers in the diagrams "Front panel features" on page 8, "Remote control unit features" on page 10 and "Rear panel connections" on page 12. In these cases, a feature of the main unit is numbered like this: 1, and a feature of the remote control unit like this: 2. Controls and connectors on other units are written in this way: REC IN.
TASCAM AV-452 Installation & Support Guide 5
How the manual is organized
The different sections of the manual are as follows:
5, Rear panel connections (page 12)
This lists the connections to and from the AV-452.
1, Introduction (page 5) This introduction

to the AV-452.

2, General installation notes (page 7)
As the title suggests, this includes general notes on the physical and electrical installation requirements for the AV-452.
6, Customization and settings (page 16) The AV-452 can be customized for the individual installations in a number of ways, using the rear panel switches, etc. This section describes the way in which this customization can be carried out, including the way in which the AV-452 can learn the IR codes necessary to control external devices.
3, Front panel features (page 8) As well
as a list of the front panel controls and features, this section provides details on the operation of the AV452. Read this section to obtain an overview of the way in which the AV-452 works.

4, Remote control unit features (page 10) This provides a list of the features and functions
available using the RC-452 remote control unit, as well as details on how to program the RC-452 to learn and replay the command codes of other units.
7, External control (page 18) The AV-452 can be controlled by an external serial controller, and this section lists the control codes available for control, status, and query. Additionally, relay control and tally indicator connectors are provided. Details of these are given in this section. 8, Specifications and block diagram (page 20) Performance figures, dimensional drawings and a block diagram of the AV-452.
6 TASCAM AV-452 Installation & Support Guide
These notes provide you with information about the installation of the AV-452. The packing should contain (in addition to this manual): The Users Guidea single sheet containing operating instructions A power cord with a 3-pin plug suitable for your region A rack mounting kit consisting of four screws and four washers The RC-452 remote control unit Two AAA batteries for use in the RC-452 remote control unit Warranty card Contact your TASCAM dealer or distributor if any of these items is missing.

Physical installation

The unit can be fitted in any standard 19" rack, using the mounting kit (screws and washers) provided. No rear support is needed. 3U of rack space is required for the unit itself. Since the AV-452 incorporates power amplifiers, it is strongly recommended that at least 1U of space is left above the unit to avoid overheating.
For the same reason, adequate space for ventilation should be left at the front and rear of the unit. In any case, the space at the rear of the unit should be sufficient to accommodate the audio and video connectors plugged into the AV-452. Since many of the functions of the unit are set using small preset controls (trimmer pots, DIP switches, etc.) on the rear panel, we suggest that you ensure you have clear visual access to the rear panel, or that you make these settings before final installation in the rack.
Do not install this apparatus in a confined space such as a book case or similar unit.

Power supply

The AV-452 can use an AC power supply as marked on the rear panel. Do not use any other voltage of power supply, as this may result in damage. The unit should be properly grounded (earthed). The power switch is located on the rear panel to prevent the user from accidentally turning power off during a presentation. If you want to turn the system on and off routinely, you may consider using a power switch for the outlets, or using a centrally-switched power distribution system.
TASCAM AV-452 Installation & Support Guide 7

A brief guide to the front panel features of the AV452, with a little more technical detail than in the Operation Guide. It can be used as a quick reference guide for everyday operation, or to form the basis for an introductory explanation to the users of the equipment.

Microphone channels

Each of the four microphone channels is identically equipped.
1 MUTE key This latching key lights when the
mic input channel is muted.
2 Fader The unity gain for this fader is at the 7
3 OL indicator Lights at 10 dB above the nominal clipping level.
4 GAIN control Provides 33 dB of control to adjust the mic level appropriately.
5 EQ section 3 bands, each providing 10 dB at the following frequencies (optimized for voice):
HI: 8 kHz (shelving) MID: 2.5 kHz (peaking) LO: 250 Hz (shelving)
AV control and selection section
This section is used to select the appropriate AV source, and control the sound. inputs of all connected equipment (except the source unit, to avoid signal loops). For example, if the cassette is selected, the cassette output is fed to the CD-RW and VCR inputs. The indicator lights. In the CASS position, the cassette output is fed to the CD-RW and VCR inputs, regardless of the AV selector keys. In the CD-RW position, the CD-RW output is fed to the cassette and VCR inputs, regardless of the AV selector keys.
9 EQ section 3 bands, each providing 10 dB at the following frequencies:
HI: 12 kHz (shelving) MID: 2.5 kHz (peaking) LO: 100 Hz (shelving)
6 DIM key This latching key is used to attenuate
the AV source signal by 20 dB. It lights when dimming is active.
A AV source selector keys Only one of these latching keys can be active (lit) at a time. Used to select the AV source.
7 Fader The unity gain for this fader, which is
used to control the level of the selected AV signal, is at the maximum level.
If the REC MONITOR selection and the selection here are the same, the source output is muted, to avoid a feedback loop. Also note that if an audio-only source has been selected (CASSETTE, CD-RW or AUX IN on the AUDIO ONLY setting), the last-selected video source will be output through the video connectors.
8 REC MONITOR control/indicator Despite the name, this control and indicator acts a record source selector. In the SOURCE position, the output of the signal selected using the AV selector keys is fed to the
8 TASCAM AV-452 Installation & Support Guide
B Video input selector keys Only one of these latching keys (RGB 1 and RGB 2) can be active (lit) at a time. They are used to select the input source for an external projector.
These RGB 1 and RGB 2 keys do not affect the switching of the composite video or S-Video outputs connected to the AV-452. They allow centralized control of a projector or display forming part of the AV system containing the AV-452. See "LEARN IR (switch 1)" on page 16 for details.

One use for this facility is to connect a recorder to log the proceedings of meetings, etc.
a EMG IN and GND connectors Use these barrier strip connectors to attach a 5 Vrms emergency signal cable.
When this signal is activated, the AV-452 will cut the signals from the LINE OUTPUT X and SPEAKER Z terminals and all front panel indicators flash.
Z SPEAKER OUTPUT A and B connectors Connect speakers to these binding
post terminals. Take care to observe polarity to avoid out-of-phase problems. The speakers attached to these terminals can be switched individually using the selector keys on the front panel I.
b INTERCOM connectors (CV IN) Use these connectors to attach the cables from a constant voltage (CV) intercom system.
Before connecting the AV-452 to such an intercom system, confirm the voltage used by the intercom system. The AV-452 can work with intercoms using 12, 24 or 70 volts. When the speaker signal arrives at the AV-452, it is converted by the AV-452 into a line level signal, where it is added to the line and speaker outputs (but not to the MEETING OUT or PHONES).
14 TASCAM AV-452 Installation & Support Guide
Note the following levels and input impedances, corresponding to the different connectors on the barrier strip:
Connector 70V 24V 12V Level, input impedance 70 V, 40 k 24 V, 12 k 12 V, 4.7 k
The THRESH trimmer pot adjusts the threshold level of the microphone signal at which the ducking facility operates. Turn this pot clockwise to increase this trigger level.
d LEVEL and GATE THRESH controls
These two trimmer pots are used with the INTERCOM signals input at b. The LEVEL control adjusts the level of the intercom signal fed to the mix (post-ROOM LEVEL). Turn this clockwise to increase the level of the signal. The GATE THRESH squelch control is used to control the threshold of a noise gate, which opens when the level of the intercom signal exceeds this level. This allows an otherwise slightly noisy intercom to be connected without interfering with the other signals.
The level of the intercom signal is set as explained below, and a squelch circuit is also available d. The intercom signal is enabled and disabled using the front panel INTERCOM key G.
c AV DUCKER RATIO and THRESH controls These trimmer pots are used if the AV
ducking facility is enabled using the DIP switches (see "Customization and settings" on page 16). If this facility is not enabled, these controls have no effect. If this is enabled, the amount by which the currentlyselected AV signal is ducked is set between 6 and 20 dB, depending on the position of the RATIO trimmer pot. Turn this pot clockwise to increase the amount that the AV signal is dimmed.

e LINE OUTPUT mode switch This switch allows the line output X of the AV-452 to act as two mono line sources, driving auxiliary amplifiers, etc. in two locations, or it allows it to act as a stereo amplifier, driving another stereo unit.
There are two D-sub connectors, used for external control of the AV-452. The details relating to these connectors are described in "External control" on page 18. the document Serial Protocol Reference (available on request from your TASCAM dealer or distributor) for full details of the format and content of the serial commands and messages.
Although the connector is marked RS-232, it can be used for RS-422 and RS-485 serial data interchange as well as for RS-232 format data.
g RELAY CONTROL connector This
female 37-pin D-sub connector accepts commands and transmits tally signals. It also can be used to connect a wired IR blaster transmitter for the control of other devices, such as a video projector or monitor.
h SERIAL ADDRESS selector Use this to
select the serial address (0 through 9) of the AV-452 when controlling it using RS-485 commands.
f RS-232 serial port This female 9-pin Dsub port accepts and receives serial signals, allowing the AV-452 to be controlled by a serial device. See
i CUSTOMIZE DIP switches See the following section for the meanings of these configuration switches.
The customization and settings of the AV-452 are made using a set of six DIP switches.
Switch Function Learn IR codes(LEARN IR) Cascade mode (CASCADE) Speaker outputs (SPK OUT) Microphone high-pass filter (MIC HPF) Intercom gate function (INT GATE) AV ducking facility (AV DUCKER)
These switches are as follows:
Up position ON Exclusive (EXC) Mono (MON) ON ON ON Down position OFF Summed (SUM) Stereo (ST) OFF OFF OFF
These are explained here:

LEARN IR (switch 1)

This function allows the AV-452 to learn the IR codes for direct control of a monitor, video projector, etc. allowing the external video source for the video display unit to be selected using the AV selection keys as well as the RGB 1 and RGB 2 keys. This allows the video signal of different devices to be hooked up directly to the monitor and switched together with the audio from one control surface (the AV-452 or the RC-452). An external IR blaster (not supplied) must be connected to the AV-452 for control of the video display unit. Here we are programming the DVD key on the AV452 to switch the video monitor to the S-Video input.

1 Make sure the power to the AV-452 is OFF. 2 Set the LEARN IR switch (switch 1) to ON. 3 Turn ON the AV-452. The AMP A, AMP B,
INTERCOM and CASCADE keys on the front
panel flash to show the unit is in IR learn mode.
4 Press the DVD key on the AV-452 front panel.

It starts to flash.

Learning the external IR commands In the
following explanation, we assume that the AV equipment is hooked up to a multi-input video display device in the following way:

Video Audio VGA 1

5 Point the video display devices remote control unit at the AV-452s IR SENSOR H and press
the key which enables the S-Video input on the remote control unit of the video display device.
If a valid IR code is received and stored, the

DVD key stops flashing.

If the IR code is not received and stored corVideo display
rectly, the DVD key continues to flash.
(RGB 1) VGA 2 Composite 1 VCR OUT RGB 2 THRU AUX OUT Composite 2 S-Video

VCR IN

AV-452

DVD OUT

The AV-452 only supports the NEC type IR command specification. If the key continues to flash, and you are sure that the source change command has been transmitted, the video display device may not conform to the NEC ITR command specification.
VCR DVD IN AUX IN DVD player
6 Press another AV selection key (for example,
the RGB 1 key) and the corresponding input key on the video remote control unit of the video display device to learn this command.

Camcorder

7 When you have finished programming these
commands, set the LEARN IR switch (switch 1) to OFF. The AV-452 resets itself and starts normal operation.
Not shown here is the IR blaster device, connected to the relay control g connector of the AV-452 and pointing at the video monitors IR receiver.
16 TASCAM AV-452 Installation & Support Guide

CASCADE (switch 2)

This switch determines the use of the audio signals received at the CASCADE IN connectors W when the CASCADE key F is activated. In the EXC (exclusive) setting, the input cascade signal replaces the direct input signals at both the LINE OUTPUT Xand SPEAKER OUT Z terminals. In the SUM setting, the cascaded signal is summed (pre ROOM LEVEL) with the direct input signals from the LINE OUTPUT Xand SPEAKER OUT Z terminals (as well as the MEETING OUT Y and PHONES J).
Remember that this only applies to audio signals. You cannot cascade video signals using the AV-452.
The cascade and intercom Note also that when the switch is set to the EXC (exclusive) setting, the CV intercom input is disabled. The front panel INTERCOM key G will not light if the switch is set to EXC. Also, when the switch is in this position, pressing the INTERCOM key will cause the key to flash briefly, indicating that the intercom input is disabled.

PC).The AV-452 is fitted with a standard 9-pin D-sub serial port, as well as a rotary address selector switch h, allowing it to take an ID from 0 through 9. This allows a number of AV-452 units to be chained together and controlled from a single source.
The serial port can operate as a RS-232, RS-422 or RS-485 port (as determined by the controller or
Only set the serial address with the power to the AV-452 turned off as the AV-452 will only recognize the setting at power-on.

Serial port pinouts

RS-232

RS-422

GND TxRx-

RS-485

TxRxGND

Tx+ Rx+

Pin 2: Rx- Data Pin 3: TX- Data Pin 5: Ground
Pin 2: Rx- Data Pin 3: Tx- Data Pin 5: Ground Pin 6: Rx+ Data Pin 7: Tx+ Data
Pin 2: TxRx- Data Pin 3: TxRx- Data Pin 5: Ground Pin 6: TxRx+ Data Pin 7: TxRx + Data
The diagrams above show the AV-452 rear panel connector. Any cable connectors will accordingly be mirror images of the above. The transmission speed is always 9,600 bps, with a character length of 8 bits, and no parity. The command spacing is >25 ms.
The RS-422 and RS-485 implementations follow standard specifications. The RS-232 operation is a modification of the RS422 port, operating at 0 to 4.5 V, rather than 9 V. It should work with most older control systems and PCs, but if you have problems with using this protocol, try using the controller with RS-422, if possible, to remedy the situation.

Relay control port

There is also a 37-pin D-sub connector gwhich may be used for relay control of the AV-452 and connecting tally indicators. The following should be taken into account when connecting external equipment to the AV-452 using this port: The relay outputs are low when active, and must be low for at least 50 ms. The maximum current is 20 mA, and the maximum voltage is 30 V. The tally indicator outputs are open collector.
18 TASCAM AV-452 Installation & Support Guide

IR blaster

Note that pin 21 (and pin 2, +5V) may be connected to an IR blaster device, which can be used to relay command codes from the AV-452 to an external monitor or projector, etc. The procedure for learning these command signals is described in "LEARN IR (switch 1)" on page 16. An IR blaster that has been found to work well with the AV-452 is the Xantech 283M IR emitter. Please consult your TASCAM distributor for up-to-date details of other suitable units that can be used with your AV-452.

RELAY CONTROL pinouts

Pin # Signal 19 GND +5V MIC 1 MUTE MIC 2 MUTE MIC 3 MUTE MIC 4 MUTE A/V DIM CASSETTE RGB 1 RGB 2 CD-RW DVD VCR AUX IN AMP A AMP B INTERCOM CASCADE VOLUME UP Meaning GND +5V (50 mA maximum) Turns the MIC 1 MUTE on and off Turns the MIC 2 MUTE on and off Turns the MIC 3 MUTE on and off Turns the MIC 4 MUTE on and off Turns the AV DIM on and off Selects Cassette as the AV source Pin # Signal NC IR OUTPUT MIC 1 MUTE Tally MIC 2 MUTE Tally MIC 3 MUTE Tally MIC 4 MUTE Tally A/V DIM Tally CASSETTE Tally CD-RW Tally DVD Tally VCR Tally AUX IN Tally RGB 1 Tally RGB 2 Tally AMP A Tally AMP B Tally INTERCOM Tally VOLUME DOWN Volume down Connect the wired IR remote device Meaning
Selects RGB 1 as the Projector or RGB monitor source 28 Selects RGB 2 as the Projector or RGB monitor source 29 Selects CD-RW as the AV source Selects DVD as the AV source Selects VCR as the AV source Selects AUX IN as the AV source Turns the AMP A output on and off Turns the AMP B output on and off Activates the INTERCOM input Activates the CASCADE input Volume up

RELAY CONTROL D-SUB 37P

+5V 10k 1k +5V 10k 1k 2.2 NF GND GND NC +5V IR OUTPUT MIC 1 MUTE C MIC 1 MUTE T MIC 2 MUTE C 4

IR Blaster

ULN2803AP

Video specifications

Composite inputs All composite inputs are

through RCA jacks.

AUX IN VCR IN DVD IN 75, 1 Vp-p 75, 1 Vp-p 75, 1 Vp-p
Composite outputs All composite outputs are
VCR OUT MONITOR OUT 75, 1 Vp-p 75, 1 Vp-p
S-Video outputs All S-Video outputs are
through 4-pin mini-DIN connectors.
S-Video inputs All S-Video inputs are through 4pin mini-DIN connectors.
VCR IN DVD IN 75, 1 Vp-p 75, 1 Vp-p

RGB 2 connections

RGB 2 IN RGB 2 THRU 15-pin D-sub female 15-pin D-sub female
AV audio and microphone specifications
AV audio inputs All inputs are made through
RCA pin jacks (unbalanced).
CASSETTE Input impedance, 47 k, Nominal input level -10 dBV (7.8 dBu) CD-RW VCR DVD AUX IN Input impedance, 47 k, Nominal input level 10 dBV (7.8 dBu) Input impedance, 47 k, Nominal input level 10 dBV (7.8 dBu) Input impedance, 47 k, Nominal input level 10 dBV (7.8 dBu) Input impedance, 47 k, Nominal input level 10 dBV (7.8 dBu)
Microphone group insert Made through TRS

1/4" jack:

Send (tip) Return (sleeve) Output impedance 100, nominal level 10 dBV (7.8 dBu), maximum level +15 dBV (+17.2 dBu) Input impedance 10 k, nominal level 10 dBV (7.8 dBu), 21 dB headroom
Microphone inputs The following figures apply
to connections made via the XLR connectors and the barrier strips.
Input impedance 2.2 k Input level 60 dBu (GAIN 4at maximum) to 27 dBu (GAIN at minimum)

AV audio outputs All outputs are made through
CASSETTE Output impedance, 100, Output level 10 dBV (7.8 dBu) (nominal), +10.8 dBV (+13 dBu) (maximum) CD-RW Output impedance, 100, Output level 10 dBV (7.8 dBu) (nominal), +10.8 dBV (+13 dBu) (maximum) Output impedance, 100, Output level 10 dBV (7.8 dBu) (nominal), +10.8 dBV (+13 dBu) (maximum)
Phantom power +48 V (global for 4 channels) OL indicator 3 Lights at 10 dB above nominal level HPF Global for 4 channels, switchable @ 80 Hz
20 TASCAM AV-452 Installation & Support Guide
Master section specifications
CASCADE INPUTS Balanced (XLR -type connectors Input impedance 10 k, input level +4 dBu LINE OUTPUT Balanced XLR-type connectors Output impedance 100 , nominal output level +4 dBu, maximum output level +23 dBu Unbalanced RCA connectors Output impedance 100 , nominal output level 10 dBV (7.8 dBu), maximum output level +15 dBV (+17.2 dBu) Barrier strip 70 V, 40 k, 24 V, 12 k or 12 V, 4.7 k 5 V r.m.s.

Phones

Connector 1/4" stereo jack Maximum output 100 mW + 100 mW (68 ) control at maximum power

Speaker outputs

Connector Load impedance Rated output power Binding posts W + 80 W (1 kHz, 1%, 8)

MEETING OUT

Maximum output power 100 W +100 W (EIA, JAITA)

INTERCOM EMG IN

Audio performance
Frequency response 20Hz to 20kHz +1.0/2.0dB, MIC IN to INSERT SEND 20Hz to 20kHz +1.0/2.0dB, LINE IN to LINE OUTPUT 20Hz to 20kHz +1.0/2.0dB, LINE IN to MEETING OUTPUT 20Hz to 20kHz +1.0/2.0dB, LINE IN to OUTPUT (to LINE sources) 50Hz to 20kHz +1.0/2.0dB, LINE IN to PHONES OUTPUT 0.07%, MIC IN to LINE OUTPUT (GAIN: MIN, DIN AUDIO) THD (nominal level, 0.03%, LINE IN to LINE OUTPUT (DIN AUDIO) 1 kHz) 0.03%, LINE IN to OUTPUT (to LINE sources) (DIN AUDIO) 0.03%, LINE IN to MEETING OUTPUT (DIN AUDIO) Noise level MIC IN (DIN Audio+A) LINE IN (DIN Audio) (GAIN: MAX, EIN, 150ohm terminated) 110dBu, MIC IN to INSERT SEND 72 dBV (70dBu), LINE IN to LINE OUTPUT 72 dBV (70dBu), LINE IN to OUTPUT (to LINE sources) 72 dBV (70dBu), LINE IN to MEETING OUTPUT 70 dBV (68dBu), LINE IN to PHONES OUTPUT Crosstalk Speaker outputs 60dB, L/R at 1kHz 65dB, Input channels at 1kHz Noise level (DIN Audio +A): 4 mV (ROOM VOLUME at max, MIC faders at min, inputs shorted); 1.2 mV (ROOM VOLUME minimum Signal-to-noise ratio (DIN Audio+A):70 dB (output of 50 W)
Power and physical specifications
Power requirement 100V AC, 50-60Hz 120V AC, 60Hz 230V AC, 50Hz 240V AC, 50Hz Power consumption Peak inrush current Applicable electromagnetic environment Dimensions (W xHxD) Weight Supplied accessories 125 W 16 A Ex 144 x 371(mm) 19.0 x 5.7 x 14.6 (in) 11.3 kg (24.9 lbs) RC-452 remote control unit 2 x AAA dry cell batteries Power cord Rack mounting kit

Dimensional drawing

482mm (19.0") 465mm (18.3") 436mm (17.2")

AV-452

Applications Guide

AV-452 Presentation Mixer/Amplier
Four phantom-powered microphone inputs on XLRs and barrier strip Three-band EQ, level, gain and mute controls for each of the four microphone inputs and the A/V buss. Selectable 100Hz rolloff on microphone inputs Audio I/O for Cassette, CD-RW, DVD, VCR and Aux Composite and S-Video I/O for DVD, VCR and Aux RGB In/Thru port for connection convenience Switchable Cascade input allows multiple rooms to be linked together Stereo digital amplier delivers 100W/side at 8 ohms Learning IR blaster with universal remote sends infrared commands to projectors and other devices when inputs are selected Record monitor selection allows dubbing between A/V devices Motorized master volume control
A/V presentations have become routine for middle management, educators and other public speakers. With its universal learning remote and IR blaster functions, the AV-452 is designed to control a sophisticated A/V system as a single, integrated unit. The AV-452 was designed primarily to assist with switching audio and video sources and to allow presenters to be heard. Four microphone inputs are available on XLR and barrier strips, enough for multiple presenters and audience participation. Each microphone input has three-band EQ, level and mute controls, and the installer can switch on a 100Hz rolloff on the mic group. The ve A/V inputs are provided for cassette, CD-RW, DVD, VCR and Aux devices. The A/V inputs include S-Video and Composite video, and sources can be routed to other destinations for dubDesigned for the special needs of meeting rooms, conference halls, churches and other presentation applications, the TASCAM AV-452 is an all-new mixer created for the needs of the contracting and installation market. The AV-452 incorporates a microphone mixer, audio/video receiver, infrared controller and digital amplier into one affordable, easyto-use component. As presentation systems and software have become more popular, bing. As devices are selected on the AV-452, IR commands can automatically be forwarded to the video projector, so the presenter only needs to press one switch to change sources. The built-in 100W digital power amp has two switchable speaker outputs, facilitating installations in multi-room setups. The AV-452 can also be cascaded for even more control over multi-room installations. Professional installers will appreciate features that make the AV-452 easy to specify and install. A constant voltage input with noise gate allows a paging system to coexist on the same speaker system as the AV-452. An EMG break can mute local audio when an emergency alarm system is activated, allowing the AV-452 to integrate with common building communication systems. The AV-452 offers a list of convenience features for the presenter, from a VGA In/Thru port for laptop connections to a learning IR remote. For even more control, the installer can connect relay switches to a parallel port, or connect an AMX or Crestron system to its RS-232/422/485 port. Since A/V systems only enhance a presentation when they run smoothly, the AV-452s most important feature is to help the presenter. It helps the speaker operate their presentation as one complete unit, increasing their condence and allowing them to focus on what they do best.

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Single Room Setups
his simple setup shows the AV-452 at the center of a single room setup. This is a common arrangement for boardrooms, small churches and school presentation rooms. Mic panels in the walls allow up to four microphones to be connected to the AV-452, or wireless microphones can be connected in their place. The DVD player and Cassette/CD-RW combo are connected to their dedicated inputs and can be switched from the AV-452s front panel or learning remote control. The AV-452s internal 100W amplier provides power for the distributed speaker system. A constant voltage input allows the buildings intercom system to be wired directly into the mixer, so the presenter can turn off background music during presentations. A gate on the CV line can still pass announcements and emergency alerts. In this case, the AV-452 functions not only as a small PA and A/V amplier, but also as a video switcher and master controller for the system.

MIC PANELS TO MIC INPUTS

AMP A&B (L/R)
COMPOSITE S-VIDEO, & RGB 2

GAIN MUTE MUTE OL

OL GAIN

GAIN MUTE

REC MONITOR

SOURCE CD-RW CD-R CASS

CASSETTE

ROOM VOLUME

INTERCOM
CD-RW EQ HI EQ HI EQ HI EQ HI EQ HI DVD

CASCADE IN

MID VCR AUX IN

RGB 2 IN

PHONES
AUDIO ONL ONLY AUDIO VIDEO

AUX IN LO

INTERCOM INPUT
CASSETTE & CD-RW CONSTANT VOLTAGE SPEAKER SYSTEM

Dual Room Feed

otel conference rooms commonly employ folding partitions so that the room can be divided for two smaller events. A hotel with modest needs can use a single AV-452 in this joined setup. The A/V equipment is placed in Room A, and will only be available in that room. When the partitions are open, both Amp A and Amp B are switched on from the AV-452s front panel. When a small group needs to use room B and the partition is closed, Amp B is switched off. The installer can even wire a toggle switch to the wall in room B to switch that rooms amplier off on the AV-452. If the client needs two stereo feeds for multimedia presentations with this setup, you can add an external power amplier for room A, use the internal amps for room B, and have the same individual control over the two rooms.

ROOM A

ROOM B

MUTE OL GAIN

REC MONIT MONITOR

AUDIO ONLY AUDIO VIDEO

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WIRELESS MICS WIRELESS MICS

Two Cascaded Rooms

imilar to the previous example, this installation shows a hotel conference room with a center divider. The difference with this installation is that each room has its own A/V setup. When the two rooms are joined together, the Cascade button is pressed on the mixer in room B. This button overrides the rest of the settings on the AV-452 in room B and instead amplies the signal from room A. Both rooms in this example play their audio back in stereo. Other applications of the Cascade function include the ability to use an external submixer or microphone mixer for large presentations. In this mode, the AV-452 amplies the signal from the Cascade input in addition to its four mic inputs and A/V components.
RGB 2, S-VIDEO COMPOSITE AMP A&B (L/R)

STEREO OUT TO CASCADE IN

RGB 2, S-VIDEO COMPOSITE

SOURCE CD-RW CASS

CASSETTE RGB 1 ROOM VOLUME INTERCOM AMP A MUTE
AMP B EQ HI EQ HI EQ HI EQ HI EQ HI
AUDIO ONLY ONL AUDIO VIDEO

WIRELESS MICS

CASSETTE & CD-RW
CONSTANT VOLTAGE SPEAKER SYSTEM
Single Room in Multiple Zones
ts not uncommon for a large presentation hall to need amplication for several zones. Some examples of exterior zones may be the hallway outside of a presentation, the restrooms and the outdoor patio. In this setup, the AV-452 is connected to a power amplier for use in the main room. The internal Amp A and Amp B in the AV-452 power the hallway and patio zones. If the presenter doesnt want his presentation to play in those zones, they can be turned off without effecting the sound inside of the room by pressing the Amp A and Amp B switches. In this installation, the AV-452s ampliers are set to mono, but the presentation in the main room still plays through the power amp in stereo. Like each of the other installations, the presenter has instant control over his or her audio and video sources, and can even switch the projectors source from the AV-452s front panel, learning remote control or toggle switch controls installed on the lectern.

MENS RESTROOM

CONFERENCE ROOM

RGB 2 S-VIDEO COMPOSITE

LADIES RESTROOM AMP A

STEREO AMPLIFIER

CLIP CLIP

ST OUT

REC MONITOR MONITOR

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AMP B WIRELESS MICS

AV-452 Connections

Stereo RCA Cassette Input Stereo RCA Cassette Output Stereo RCA CD-RW Input Stereo RCA CD-RW Output Stereo RCA VCR Input Stereo RCA VCR Output Stereo RCA DVD Input Stereo RCA Meeting Record Output (4) XLR-F Microphone Inputs Barrier Strip for four microphone inputs and Intercom input Stereo XLR Output Stereo XLR Cascade Input Banana Plug Amp A Output Banana Plug Amp B Output Composite and S-Video Monitor Output Composite and S-Video VCR Input Composite and S-Video VCR Output Composite and S-Video DVD Input HD15 RGB 2 Thru DB37 Parallel Control DB9 for RS-232/422/485 control Power Input and Voltage Selector
7733 Telegraph Rd Montebello, CA 90640 phone 323.726.0303 www.tascam.com
2003 TEAC Corporation All trademarks are the property of their respective holders. All rights reserved. Design and specications subject to change without notice. Product photographs are shown only to illustrate the types of product which are compatible with the TASCAM AV-452. These products are not manufactured by the TASCAM Division of TEAC Corporation.

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