WMS 450 Multichannel System
Schematic & Part List

1-12 Channel

MCS0802001
Wolfgang Fritz / Feb. 2008

Introduction

The following schematics will help you to easily set up multi channel systems. Please use the equipment that is specified in the schematics only. For your convenience and understanding, weve added technical information and part lists. You can use this part lists when ordering the system you require! If you need any help regarding the frequency regulations or if your particular situation doesnt allow for a standard system to be installed, please do not hesitate to contact us under support@akg.com.
All the WMS450 Systems in this document are designed with active antennas that can used in all venues with a 20m RG58 antenna cable. SRA2 B/W active directional antenna For Venues (tour sound &installs) that cover large distances (up to 150m, 500 ft) like music halls, stadiums and other open air applications.
RA4000 B/W active omni-directional antenna For Venues without a designated transmitter area and up to 100m/330 ft free line of sight. Ideal for conference rooms, multi purpose halls, houses of worship etc.

Content

General Information Receiver/Antenna Placement Squelch Intermodulation Cable Attenuation PS4000 dip switch AB4000 dip switch PS4000 dip Switch Matrix Required Component Matrix Glossar WMS System 1 Channel 1 Channel 2 Channel no PSChannel no PSChannel 2 Channel 4 Channel no PSUChannel no PSUChannel 4 Channel 5 Channel 5 Channel 6 Channel 6 Channel 8 Channel 8 Channel 9 Channel 9 Channel 10 Channel 10 Channel 12 Channel 12 Channel Antenna Type SRA2 B/W RA4000 B/W SRA2 B/W RA4000 B/W SRA2 B/W RA4000 B/W SRA2 B/W RA4000 B/W SRA2 B/W RA4000 B/W SRA2 B/W RA4000 B/W SRA2 B/W RA4000 B/W SRA2 B/W RA4000 B/W SRA2 B/W RA4000 B/W SRA2 B/W RA4000 B/W SRA2 B/W RA4000 B/W Information Information Information Information Information Information Information Information Information Page 8 Page 49 51
Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List Schematic / Part List

Technical Information

Wireless Basics
Every wireless microphone system has to operate on one specific frequency Transmitter and receiver of a system need to work on the same frequency Two transmitters cannot be used with one receiver at the same time
Receiver/Antenna Placement
Direct line of sight between transmitter and receiver antenna Place the receiver/antennas at least 5 ft. (1.5 m) away from all transmitters Place the receiver antennas at least 5 ft. (1.5 m) away from any big metal object, wire(particularly wire mesh) or sheet metal structures, walls, ceilings, etc. Do not place the antennas in hidden places (behind walls) Place the receiver at least 5 ft. (1.5 m) away from any equipment that may emit RF radiation such as lighting racks, fluorescent lamps, digital effect units, or PCs

Squelch

Standard: Carrier squelch, manual Operates strictly on the signal strength of the signal. If received signal strength drops under the adjustable squelch threshold the audio output is muted Advanced: Tone Code (only WMS4000) The audio turns on only in the presence of the correct tone code and an adequate signal strength (-100dbm) Lock out all signals except ones with the correct key.
Intermodulation Intermodulation is the result of two or more signals of different frequencies being mixed together, forming additional signals that are not harmonic frequencies of either.

By using more than one transmitter simultaneously at the same location, intermodulation happens in the receiver and/or transmitter. In your case this intermodulation products are generated in the bandwidth that you are using. To avoid intermodulating frequencies, we offer you pre-calculated frequencies as presets in the SR450 and SR4000 Receiver. Please, make sure that when setting up a multi channel system, all your receivers are set to the same country preset (NAME) and group. Use the Automatic channel function (auto setup) to scan for free frequencies at your venue.
MCS0802001 Wolfgang Fritz / Feb. 2008

Cable Attenuation

To obtain the best sound possible, you need to have the right RF input level throughout your signal chain. Premium quality wireless systems like the WMS450 and WMS4000, offer you adjustable RF-level settings that garantee to maximise operating distance even when using different cable lenghts and different types of cable! For this purpose, AKGs PS4000W antenna splitter, has 3 dip switches that youll find on the right side of its front panel, behind the AKG logo.
RG58 Cable Attenuation (MKPS, MKA5, MKA20 antenna cable)

PS4000 dip switch

This dip switch reduce the input RF level of the PS4000 between 0 dB and 14 dB. All antenna output level and the cascade(link) output level have an effect on this reduction.

PS4000W Power Splitter

Rear View
Antenna A cascade output Antenna A input Ant. B (DC power) 4x Antenna A output (DC power)

Signal level adjustment

Attenuation
dip switches behind AKG Logo

AB4000 dip switch

The AB4000 has a fix 17.5dB amplifier in the output stage. The dip switch reduce the input RF level of the AB4000 between 0 dB and -14 dB. AB4000 get the DC power through the antenna cable from the PS4000 or an ASU4000 unit.

AB4000 Antenna Booster

Internal Attenuation

Total Gain

3.5 dB 5.5 dB 7.5 dB 9.5 dB 11.5 dB 13.5 dB 15.5 dB 17.5 dB
PS4000 dip switch matrix (RG58 cable)
Passiv Antennas Antenna type & Gain Cable type & Length 0110E0189 1m / 3ft wave UHF Antenna 0 dB RA4000 W 1 dB SRA2 W 4-6 dB RA4000 BW 18 dB SRA2 BW 22-24 dB Active Antennas

MKA 5 5m / 16ft

-14 dB
MKA 20 20m / 66ft MKA 5 + MKA 20 25m / 82ft

-12 dB

-10 dB

2x MKA 20 40m / 132ft

RA4000 BW 2x MKA 20
SRA2 BW 2x MKA 20 ABdB 1x MKA 20 PS4000 -8 dB SRA2 BW 2x MKA 20 ABdB 2x MKA 20 PSdB
3x MKA 20 60m / 198ft Antenna Booster AB4000 necessary !

ABdB 1x MKA 20 PS4000 -4 dB RA4000 BW 2x MKA 20
4x MKA 20 80m / 264ft Antenna Booster AB4000 necessary !

ABdB 2x MKA 20 PSdB

You have to use this PS4000 dip switch settings at all PS4000 with direct connection to the antennas. All cascade PS4000 have the same dip switch setting ON/ON/ON (0dB)
WMS450/4000 Component Matrix

Number of

Standard Power Supply ! only available in US ! Power Supply AC12 Power Supply HUB4000Q 4 6

WMS Receiver 52

PS13 13

ZAPD-0 0

MKPS 128

PSU5 5

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + +

AC12 Power Supply 2

PSU01/13 13
Additional you will need min. 2x antennas and 2x MKAxx antenna cables! Please, look at the "PS4000 dip switch matrix (RG58)" to find your antenna components. PSU01/4000 is a 12V/2A Power Supply Adapter (1x PSU4000 = 3x PSU01/4000)

Glossar

ANT A IN ANT B IN DATA DC IN (12V/0.5A) LOGIC OUT XLR TS AUDIO OUT AUDIO OUT Mixer

SR4000

SR4000 WMS4000 Stationary Receiver PS4000W Power Splitter 1:4 (Distribute RF signal and DC Power)
Splits 1 antenna to 4 receiver Antenna cascade(Link) output to send RF-Signal to next PS4000. Cascade max. 3 PS4000. If you need more than 12 channels use an ZAPD in front of the first PS4000.

ANT A IN

ANT B IN CASCADE B CASCADE A 3B 4A 4B

PS4000W

DC IN (12V/0.5A) 1A 1B 2A 2B 3A

PSU4000

~90-230V
AC POWER DC OUT 1 (2.5A) DC OUT 2 (2A) DC OUT 3 (2A)
PSU4000 Power Supply Unit with 3x 12 volt outputs (2.5A and 2A) SRA2 B/W Active Directional Antenna (21dB Gain)

SRA2 B/W

ANT OUT

RA4000 B/W

RA4000 B/W Active Omni-directional Antenna (18dB Gain)

HPA4000

DC IN (12V/0.5A) Headphone
HPA4000 Headphone Amplifier (8x stereo jack inputs, 1 HP output) CU400 Charging Unit for WMS400/450 (2 transmitter / unit) ZAPD-21 Passive Combiner 2:1 and 1:2 ASU4000 Antenna Supply Unit
Supplies up to three active elements (RA4000BW, SRA2BW, AB4000)

CU4000

DC IN (12V/1.4A)

ZAPD-21

ANT IN

ASU4000

DC IN (12V/0.5A) ANT OUT

AB4000

3.5 dB 17.5 dB amplifier

DEV2 DEV1

HUB4000Q
DC IN (12V/0.5A) ETHERNET
HUB4000Q Network Concentrator for 8 devices (SR4000 or SST4)
Operate with Harman System Architect software - http://hiqnet.harmanpro.com
Cable MKPS 0.65m/2 feet RG58 antenna cable MKA5 5m/16ft RG58 antenna cable MKA20 20/66ft RG58 antenna cable 0110E01890 Front assembly cable
Install wave antennas at the front of the rack
Front assembly cable & wave antenna
1 Channel WMS450 System With directional antennas & 40m antenna cable (132 feet)

2x MKA20 (BNC I-connector is necessary to link cables!)
BNC I-connector Available e.g. www.rs-components.com, Ordernumber 112-1798
AC12 Power Supply (500mA)

2xMKPS

ANT B IN
DC IN (12V/0.5A) TS XLR AUDIO OUT AUDIO OUT Mixer

K171 Studio Headphone

2 HT450 or PT450 charging system (optional)

5V Power Supply (1.4 A)

DC IN (5V/1.4A)
Headphone amplifier (optional)

1.0 Date

Build document
02.02.2008 Wolfgang Fritz

Revision

1.0 MCS0802001

Designer Project

Ref.No.

1 channel WMS450 system

(SRA2 B/W Antennas)
1 Channel WMS450 System with directional antennas, no PSU4000, no PS4000 Multichannel Systems with external antennas

WMS 450

description

comment

PT 450 or HT 450 transmitter; SR 450 receiver, with AC adapter, rack mount kit, mic holder, batteries, user's manual; carrying case
3235X. 3236X. 3237X. 3238X. 3239X. 3009Z0001 6000H0206 6000H0205 3009Z0010 7801H000

SRA 2 B/W MK PS MKA 20

External directional active "paddle" antenna with amplifier (2 req.) Connecting cable for PS to SR 2.15ft (65cm) 66 ft. (20m) Cables for connecting ext. antennas to multi-couplers (2 req.) KOAX RG58 Antenna Supply unit for long antenna cables (BNC connector) without AC-Adapter 12V AC-Adapter for 1 PS 4000, ASU4000, HUB 4000, HPA 4000 or SR 4000. EXTERNAL !! Not available at AKG - BNC I-Connector (you can buy it at www.rs-components.com, Ordernumber 112-1798)
ASU 4000 (BNC/none) 10 AC 12

BNC I-connector

Optional Components (Charging System & Headphone Amplifier)
CU 400 HPA 4000/ none K171 Studio AC 12
Charging unit for WMS 400 transmitters, AC adapters included Headphone monitoring amplifier-8 receivers ins; & selectable out without AC Adapter Closed-back circum-aural dynamic stereo headphone, mini XLR connector, detachable cable 12V AC-Adapter for 1 PS 4000, ASU4000, HUB 4000, HPA 4000 or SR 4000.
2934Z000 2998Z0004 2908Z0001 7801H000
1 Channel WMS450 System with omni-directional antennas & 25m antenna cable (82 feet)
1x MKA20 + 1x MKA5 (BNC I-connector is necessary to link cables!)

(RA4000 B/W Antennas)

1 Channel WMS450 System with omni-directional antennas, no PSU4000, no PS4000 Multichannel Systems with external antennas
3235X. 3236X. 3237X. 3238X. 3239X. 2632Z0030 6000H0206 6000H0205 3009Z0010 7801H000

RA 4000 B/W MK PS MKA 20

External omni-directional active dipoleantenna with amplifier (2 req.) Connecting cable for PS to SR 2.15ft (65cm) 66 ft. (20m) Cables for connecting ext. antennas to multi-couplers (2 req.) KOAX RG58 Antenna Supply unit for long antenna cables (BNC connector) without AC-Adapter 12V AC-Adapter for 1 PS 4000, ASU4000, HUB 4000, HPA 4000 or SR 4000. EXTERNAL !! Not available at AKG - BNC I-Connector (you can buy it at www.rs-components.com, Ordernumber 112-1798)
2 Channel WMS450 System With directional antennas & 40m antenna cable (132 feet)

4xMKPS

2 channel WMS450 system
(SRA2 B/W Antennas, no PS4000, PSU4000)
2 Channel WMS450 System with directional antennas, no PSU4000, no PS4000 Multichannel Systems with external antennas
3235X. 3236X. 3237X. 3238X. 3239X. 3009Z0001 6000H0206 6000H0205 3009Z0010 7801H000 SERVSON76
External directional active "paddle" antenna with amplifier (2 req.) Connecting cable for PS to SR 2.15ft (65cm) 66 ft. (20m) Cables for connecting ext. antennas to multi-couplers (2 req.) KOAX RG58 Antenna Supply unit for long antenna cables (BNC connector) without AC-Adapter 12V AC-Adapter for 1 PS 4000, ASU4000, HUB 4000, HPA 4000 or SR 4000. passive power combiner (2in 1out) or Splitter (1in 2out) EXTERNAL !! Not available at AKG - BNC I-Connector (you can buy it at www.rs-components.com, Ordernumber 112-1798)
ASU 4000 (BNC/none) 10 AC 12 ZAPD21
2 Channel WMS450 System with omni-directional antennas & 25m antenna cable (82 feet)
(RA4000 B/W Antennas, no PS4000, PSU4000)
2 Channel WMS450 System with omni-directional antennas, no PSU4000, no PS4000 Multichannel Systems with external antennas
3235X. 3236X. 3237X. 3238X. 3239X. 2632Z0030 6000H0206 6000H0205 2455Z0062 3009Z0010 7801H000 SERVSON76
RA 4000 B/W MK PS MKA 20 MKA 5
External omni-directional active dipoleantenna with amplifier (2 req.) Connecting cable for PS to SR 2.15ft (65cm) 66 ft. (20m) Cables for connecting ext. antennas to multi-couplers (2 req.) KOAX RG58 16.5 ft. (5m) Cables for connecting ext. antennas to multi-couplers (2 req.) KOAX RG58 Antenna Supply unit for long antenna cables (BNC connector) without AC-Adapter 12V AC-Adapter for 1 PS 4000, ASU4000, HUB 4000, HPA 4000 or SR 4000. passive power combiner (2in 1out) or Splitter (1in 2out) EXTERNAL !! Not available at AKG - BNC I-Connector (you can buy it at www.rs-components.com, Ordernumber 112-1798)

2 Channel WMS450 System with directional antennas & 20(40)m antenna cable (66 or 132 feet)
Antenna A cascade output Antenna A input (DC power) Ant. B
4x Antenna A output (DC power)
40m / 132 ft Version: 2x MKA20 BNC I-connector is necessary to link cables! Available e.g. www.rs-components.com, Ordernumber 112-1798
1xMKA20 (20m Cable) -12dB up

2xMKA20 (40m Cable) -2dB

down ANT A IN ANT B IN CASCADE B CASCADE A 3B 4A 4B

1A 1B 2A 2B 3A

AC-CU4000 Power Supply (1.4A) (recommend) or AC12 Power Supply (500mA)

DC IN (12V/0.5A)

DC IN (12V/0.5A) XLR TS AUDIO OUT AUDIO OUT Mixer
2 channel WMS450 system (SRA2 B/W Antennas, no PSU4000)
2 Channel WMS450 System with directional antennas, PSU4000 Multichannel Systems with external antennas
3235X. 3236X. 3237X. 3238X. 3239X. 2996Z0008 3009Z0001 6000H0206 6000H0205 7801H000
PS 4000W SRA 2 B/W MK PS MKA 20 AC-CU 4000
Wide band antenna multi coupler (4+1 out) without AC-Adapter External directional active "paddle" antenna with amplifier (2 req.) Connecting cable for PS to SR 2.15ft (65cm) 66 ft. (20m) Cables for connecting ext. antennas to multi-couplers (2 req.) KOAX RG58 12V AC-Adapter (EU-Version) power supply CU4000, PS 4000 Additional parts for 40m(132feet) Antenna Cable

MKA 20

66 ft. (20m) Cables for connecting ext. antennas to multi-couplers (2 req.) KOAX RG58 EXTERNAL !! Not available at AKG - BNC I-Connector (you can buy it at www.rs-components.com, Ordernumber 112-1798)

6000H0205

2 Channel WMS450 System with omni-directional antennas & 20(40)m antenna cable (66 or 132 feet)
1xMKA20 (20m Cable) -8dB up

2xMKA20 (40m Cable) 0dB

8xMKPS
2 channel WMS450 system (RA4000 B/W Antennas, no PSU4000)
2 Channel WMS450 System with omni-directional antennas, no PSU4000 Multichannel Systems with external antennas
3235X. 3236X. 3237X. 3238X. 3239X. 2996Z0008 2632Z0030 6000H0206 6000H0205 7801H000
PS 4000W RA 4000 B/W MK PS MKA 20 AC-CU 4000
Wide band antenna multi coupler (4+1 out) without AC-Adapter External omni-directional active dipoleantenna with amplifier (2 req.) Connecting cable for PS to SR 2.15ft (65cm) 66 ft. (20m) Cables for connecting ext. antennas to multi-couplers (2 req.) KOAX RG58 12V AC-Adapter (EU-Version) power supply CU4000, PS 4000 Additional parts for 40m(132feet) Antenna Cable
4 Channel WMS450 System with directional antennas & 20(40)m antenna cable (66 or 132 feet)
AC-CU4000 Power Supply (1.4A)
4 HT450 or PT450 charging system (optional)
4 channel WMS450 system (SRA2 B/W Antennas, no PSU4000)

4 Channel WMS450 System with directional antennas, no PSU4000 Multichannel Systems with external antennas
4 Channel WMS450 System with omni-directional antennas & 20(40)m antenna cable (66 or 132 feet)
4 channel WMS450 system (RA4000 B/W Antennas, no PSU4000)
4 Channel WMS450 System with omni-directional antennas, no PSU4000 Multichannel Systems with external antennas
AC POWER DC OUT 1 (2.5A) DC OUT 2 (2A) DC OUT 3 (2A) 1xMKA20 (20m Cable) -12dB up 2xMKA20 (40m Cable) -2dB
4 channel WMS450 system (SRA2 B/W Antennas)
4 Channel WMS450 System with directional antennas Multichannel Systems with external antennas
3235X. 3236X. 3237X. 3238X. 3239X. 2996Z0008 3009Z0001 6000H0206 6000H0205 2997Z000
PS 4000W SRA 2 B/W MK PS MKA 20 PSU 4000
Wide band antenna multi coupler (4+1 out) without AC-Adapter External directional active "paddle" antenna with amplifier (2 req.) Connecting cable for PS to SR 2.15ft (65cm) 66 ft. (20m) Cables for connecting ext. antennas to multi-couplers (2 req.) KOAX RG58 Central Power supply unit for powering up to 3 WMS 4000 HUB 4000, HPA 4000, CU 4000 or up to 12 receivers via PS 4000, Mains Cable Additional parts for 40m(132feet) Antenna Cable
CU 400 HPA 4000/ none K171 Studio
Charging unit for WMS 400 transmitters, AC adapters included Headphone monitoring amplifier-8 receivers ins; & selectable out without AC Adapter Closed-back circum-aural dynamic stereo headphone, mini XLR connector, detachable cable
2934Z000 2998Z0004 2908Z0001
AC POWER DC OUT 1 (2.5A) DC OUT 2 (2A) DC OUT 3 (2A) 1xMKA20 (20m Cable) -8dB up 2xMKA20 (40m Cable) 0dB
4 channel WMS450 system (RA4000 B/W Antennas)
4 Channel WMS450 System with omni-directional antennas Multichannel Systems with external antennas
3235X. 3236X. 3237X. 3238X. 3239X. 2996Z0008 2632Z0030 6000H0206 6000H0205 2997Z000
PS 4000W RA 4000 B/W MK PS MKA 20 PSU 4000
Wide band antenna multi coupler (4+1 out) without AC-Adapter External omni-directional active dipoleantenna with amplifier (2 req.) Connecting cable for PS to SR 2.15ft (65cm) 66 ft. (20m) Cables for connecting ext. antennas to multi-couplers (2 req.) KOAX RG58 Central Power supply unit for powering up to 3 WMS 4000 HUB 4000, HPA 4000, CU 4000 or up to 12 receivers via PS 4000, Mains Cable Additional parts for 40m(132feet) Antenna Cable
5 Channel WMS450 System with directional antennas & 20(40)m antenna cable (66 or 132 feet)

10xMKPS

6 HT450 or PT450 charging system (optional)
5 channel WMS450 system (SRA2 B/W Antennas)
5 Channel WMS450 System with directional antennas Multichannel Systems with external antennas
5 Channel WMS450 System with omni-directional antennas & 20(40)m antenna cable (66 or 132 feet)
5 channel WMS450 system (RA4000 B/W Antennas)
5 Channel WMS450 System with omni-directional antennas Multichannel Systems with external antennas
6 Channel WMS450 System with directional antennas & 20(40)m antenna cable (66 or 132 feet)
AC POWER DC OUT 1 (2.5A) DC OUT 2 (2A) DC OUT 3 (2A) 1xMKA20 (20m Cable) -12dB up 2xMKA20 (40m Cable) -2dB 0dB up
down ANT A IN ANT B IN CASCADE B CASCADE A 3B 4A 4B ANT A IN ANT B IN CASCADE B CASCADE A 3B 4A 4B
DC IN (12V/0.5A) 1B 2A 2B 3A
6 channel WMS450 system (SRA2 B/W Antennas)
6 Channel WMS450 System with directional antennas Multichannel Systems with external antennas
6 Channel WMS450 System with omni-directional antennas & 20(40)m antenna cable (66 or 132 feet)
AC POWER DC OUT 1 (2.5A) DC OUT 2 (2A) DC OUT 3 (2A) 1xMKA20 (20m Cable) -8dB up 2xMKA20 (40m Cable) 0dB 0dB up
6 channel WMS450 system (RA4000 B/W Antennas)
6 Channel WMS450 System with omni-directional antennas Multichannel Systems with external antennas
8 Channel WMS450 System with directional antennas & 20(40)m antenna cable (66 or 132 feet)
SR8 SR7 SR6 SR4 SR3 SR2 SR5 SR1
8 HT450 or PT450 charging system (optional)
8 channel WMS450 system (SRA2 B/W Antennas)
8 Channel WMS450 System with directional antennas Multichannel Systems with external antennas
8 Channel WMS450 System with omni-directional antennas & 20(40)m antenna cable (66 or 132 feet)
8 channel WMS450 system (RA4000 B/W Antennas)
8 Channel WMS450 System with omni-directional antennas Multichannel Systems with external antennas
9 Channel WMS450 System with directional antennas & 20(40)m antenna cable (66 or 132 feet)
10 HT450 or PT450 charging system (optional)