DBX 223XL Manual
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1. Mai 2010 in Schwieberdingen
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2-Way, 3-Way 4-Way Crossovers
223/223XL - 234/234XL
RISK OF ELECTRIC SHOCK DO NOT OPEN
FOR YOUR PROTECTION, PLEASE READ THE FOLLOWING:
WATER AND MOISTURE: Appliance should not be used near water (e.g. near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings. POWER SOURCES: The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance. GROUNDING OR POLARIZATION: Precautions should be taken so that the grounding or polarization means of an appliance is not defeated. POWER CORD PROTECTION: Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance. SERVICING: To reduce the risk of fire or electric shock, the user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel. FOR UNITS EQUIPPED WITH EXTERNALLY ACCESSIBLE FUSE RECEPTACLE: Replace fuse with same type and rating only.
A T T E N T I O N : RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR W A R N I N G : TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE The symbols shown above are internationally accepted symbols that warn of potential hazards with electrical products. The lightning flash with arrowpoint in an equilateral triangle means that there are dangerous voltages present within the unit. The exclamation point in an equilateral triangle indicates that it is necessary for the user to refer to the owners manual. These symbols warn that there are no user serviceable parts inside the unit. Do not open the unit. Do not attempt to service the unit yourself. Refer all servicing to qualified personnel. Opening the chassis for any reason will void the manufacturers warranty. Do not get the unit wet. If liquid is spilled on the unit, shut it off immediately and take it to a dealer for service. Disconnect the unit during storms to prevent damage.
U.K. MAINS PLUG WARNING
A moulded mains plug that has been cut off from the cord is unsafe. Discard the mains plug at a suitable disposal facility. NEVER UNDER ANY CIRCUMSTANCES SHOULD YOU INSERT A DAMAGED OR CUT MAINS PLUG INTO A 13 AMP POWER SOCKET. Do not use the mains plug without the fuse cover in place. Replacement fuse covers can be obtained from your local retailer. Replacement fuses are 13 amps and MUST be ASTA approved to BS1362.
This unit conforms to the Product Specifications noted on the Declaration of Conformity. Operation is subject to the following two conditions: this device may not cause harmful interference, and this device must accept any interference received, including interference that may cause undesired operation. Operation of this unit within significant electromagnetic fields should be avoided. Use only shielded interconnecting cables.
NOTICE FOR CUSTOMERS IF YOUR UNIT IS EQUIPPED WITH A POWER CORD. WARNING: THIS APPLIANCE MUST BE EARTHED. The cores in the mains lead are coloured in accordance with the following code: GREEN and YELLOW - Earth BLUE - Neutral BROWN - Live
As colours of the cores in the mains lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows: The core which is coloured green and yellow must be connected to the terminal in the plug marked with the letter E, or with the earth symbol, or coloured green, or green and yellow. The core which is coloured blue must be connected to the terminal marked N or coloured black. The core which is coloured brown must be connected to the terminal marked L or coloured red. This equipment may require the use of a different line cord, attachment plug, or both, depending on the available power source at installation. If the attachment plug needs to be changed, refer servicing to qualified service personnel who should refer to the table below. The green/yellow wire shall be connected directly to the unit's chassis.
CONDUCTOR L N LIVE NEUTRAL
WIRE COLOR Normal BROWN BLUE Alt BLACK WHITE GREEN
E EARTH GND GREEN/YEL
WARNING: If the ground is defeated, certain fault conditions in the unit or in the system to which it is connected can result in full line voltage between chassis and earth ground. Severe injury or death can then result if the chassis and earth ground are touched simultaneously.
TABLE OF CONTENTS
WA R R A N T Y. 2 INTRODUCTION.....2 INSPECTION.....3 234/234XL FRONT PANEL OPERATION.....3 223/223XL FRONT PANEL OPERATION.....5 234/234XL-223/223XL REAR PANEL OPERATIONS....6 234/234XL-223/223XL AUDIO CONNECTIONS....7 ELECTRICAL CONNECTIONS.....7 FEATURES......7 RACK MOUNTING, GROUNDING AND SAFETY....8 TROUBLESHOOTING......9 234/234XL-223/223XL SPECIFICATIONS....11 DECLARATION OF CONFORMITY....12
8760 South Sandy Pkwy. Sandy, Utah 84070 Phone: (801) 568-7660 Fax: (801) 568-7662 Intl Fax: (219) 462-4596
A Harman International Company
Questions or comments? Email us at: email@example.com or visit our World Wide Web home page at: http://www.dbxpro.com
1. The warranty registration card that accompanies this product must be mailed within 30 days after purchase date to validate this warranty. Proof-of-purchase is considered to be the burden of the consumer. 2. dbx warrants this product, when bought and used solely within the U.S., to be free from defects in materials and workmanship under normal use and service. 3. dbx liability under this warranty is limited to repairing or, at our discretion, replacing defective materials that show evidence of defect, provided the product is returned to dbx WITH RETURN AUTHORIZATION from the factory, where all parts and labor will be covered up to a period of two years. A Return Authorization number must be obtained from dbx by telephone. The company shall not be liable for any consequential damage as a result of the product's use in any circuit or assembly. 4. dbx reserves the right to make changes in design or make additions to or improvements upon this product without incurring any obligation to install the same additions or improvements on products previously manufactured. 5. The foregoing is in lieu of all other warranties, expressed or implied, and dbx neither assumes nor authorizes any person to assume on its behalf any obligation or liability in connection with the sale of this product. In no event shall dbx or its dealers be liable for special or consequential damages or from any delay in the performance of this warranty due to causes beyond their control. Congratulations on your purchase of the dbx 223/223XL or 234/234XL crossover. We are confident you will find this crossover to be the finest product of its kind in this price range. We have taken care to include all of the features you need to make your system sound its best. Some of the features common to both the 234/234XL and the 223/223XL crossovers are: back panel switches for selecting the operating mode of the crossover. back panel switches indicating the selected range of crossover frequencies. Both of these features have LED indicators on the front panel so you can see at a glance which mode the unit is in. low frequency summed output designed specifically for mono subwoofer applications. phase invert switches on all outputs. individual level controls on every output. We are sure you will agree that these crossovers are built to provide extremely high quality frequency division for all applications.
Before going any further, you should take time to fill out your warranty registration card and inspect the contents of the shipping carton. Inside both the 223/223XL and 234/234XL boxes you should find the following: either the dbx model 223, 223XL, 234, or the 234XL crossover. operation manual (you are reading it!) 4 rack screws and washers power cord.
The contents of this manual are subject to change at any time without notice.
dbx 234/234XL Front Panel
Note: There are no front panel differences between the 234 and the 234XL. Therefore the 234XL is shown below, representing both the 234 and the 234XL.
-6 +40 Hz
680 x10 1.4k 700
2.4k 3.5k -30 6.8k 450 Hz 9.6k XOVER FREQ LOW-MID/HIGH-MID
-INV dB +6 GAIN LOW OUTPUT -30
-INV dB +6 GAIN -30
-10 -INV dB +6 GAIN -12
2.4k 3.5k -30 6.8k 450 Hz 9.6k XOVER FREQ HIGH-MID/HIGH
-INV dB +6 GAIN HIGH OUTPUT
dB +12 GAIN INPUT LOW CUT
45 Hz 960 XOVER FREQ LOW/LOW-MID
dB +12 GAIN
45 Hz 960 XOVER FREQ
STEREO 2-WAY MODE
In 2-way stereo mode the controls are marked BELOW the horizontal blue line. Channel One and Channel Two functions are identical in the stereo mode. Front panel controls not described in this section are not active in stereo 2-way operation.  &   &   &   &   &   &   &   &   INPUT GAIN LOW CUT LOW/MID* X10 LED LOW OUTPUT PHASE INVERT HIGH OUTPUT PHASE INVERT STEREO Controls the INPUT level with +/- 12 dB of gain. Switch for selecting the 40 Hz high pass filter. An LED indicates the selection. Selects crossover point between the LOW and HIGH outputs. Indicates that the LOW/HIGH crossover frequency range is 450 Hz to 9.6 kHz. Controls the Low frequency output level with a range of - to +6 dB. Switch for reversing the polarity on the Low Output. An LED indicates that the phase is inverted. Controls the High frequency output with a range of - to +6 dB. Switch for reversing the polarity on the High Output. An LED indicates that the phase is inverted. LED indicating stereo mode operation.
* although this control is labeled as LOW/MID, it operates as the crossover frequency control between low and high frequencies in stereo 2-way operation.
-6 +40 Hz x10 -12 dB +12 GAIN INPUT LOW CUT 45 Hz 960 XOVER FREQ LOW/LOW-MID 450 Hz 9.6k XOVER FREQ LOW-MID/HIGH-MID dB +6 GAIN LOW OUTPUT dB +6 GAIN 1.4k 2.4k 3.5k -30 6.8k -10 -10
0 INV -30
-INV -INV dB +6 GAIN HIGH OUTPUT
680 x10 700
2.4k 1.4k 3.5k
-10 -30 6.8k 0 INV dB +6 GAIN -30
450 Hz 9.6k XOVER FREQ HIGH-MID/HIGH
dB +6 GAIN
STEREO 3-WAY MODE
In 3-way stereo operation the controls are marked BELOW the horizontal blue line. Channel One and Channel Two functions are identical in the stereo mode. LEDs are disabled for controls which are nonfunctional in this mode.  &   &   &   &   &   &   &   &   &   &   &   INPUT GAIN LOW CUT LOW/MID LED MID/HIGH LOW OUTPUT PHASE INVERT MID OUTPUT PHASE INVERT HIGH OUTPUT PHASE INVERT STEREO Controls the INPUT level with +/- 12 dB of gain. Switch for selecting the 40 Hz high pass filter. An LED indicates the selection. Selects crossover point between LOW and MID frequencies. Indicates that the LOW/MID crossover frequency range is 450 Hz to 9.6 kHz. Selects crossover point between MID and HIGH frequencies. Controls the Low Frequency output level with a range of - to +6 dB. Switch for reversing the polarity on the Low Output. An LED indicates the selection. Controls the Mid Frequency output with a range of - to +6 dB. Switch for reversing the polarity on the Mid Output. An LED indicates the selection. Controls the High Frequency output with a range of - to +6 dB. Switch for reversing the polarity on the High output. An LED indicates the selection. LED indicating stereo mode operation.
MONO 4 -WAY MODE
In 4-way mono operation the controls are marked ABOVE the horizontal blue line. Front panel controls not described in this section are not active in mono 4-way mode. LEDs are disabled for controls which are non-functional in mono 4-way mode.
             
INPUT GAIN LOW CUT LOW/LOW-MID LED
LOW-MID/HIGH-MID HIGH-MID/HIGH LOW OUTPUT PHASE INVERT LOW-MID OUTPUT PHASE INVERT HIGH-MID OUTPUT PHASE INVERT HIGH OUTPUT PHASE INVERT MONO
Controls the input level with +/- 12 dB of gain. Switch for selecting the 40 Hz high pass filter. An LED indicates the selection. Selects crossover point between LOW and LOW-MID frequencies. Indicates that the LOW/LOW-MID crossover frequency range is 450 Hz to 9.6 kHz. Selects the crossover point between LOW-MID and HIGH-MID frequencies. Selects the crossover point between HIGH-MID and HIGH frequencies. Controls the LOW frequency output level with a range of - to +6 dB. Switch for reversing the polarity on the Low Output. An LED indicates the selection. Controls the LOW-MID frequency output level with a range of - to +6 dB. Switch for reversing the polarity on the Low-Mid Output. An LED indicates the selection. Controls the HIGH-MID frequency output level with a range of - to +6 dB. Switch for reversing the polarity on the High-Mid Output. An LED indicates the selection. Controls the HIGH frequency output level with a range of - to +6 dB. Switch for reversing the polarity on the High Output. An LED indicates the selection. LED indicating mono mode operation.
dbx 223/223XL Front Panel
-6 +40 Hz -12
Note: There are no front panel differences between the 223 and the 223XL. Therefore the 223XL is shown below, representing both the 223 and the 223XL.
-x10 -INV -INV 40 Hz -12 +-10 -140
Hz 960 XOVER FREQ LOW/MID
dB +6 GAIN LOW OUTPUT
Hz 960 XOVER FREQ MID/HIGH
dB +6 GAIN MID OUTPUT
dB +6 GAIN HIGH OUTPUT
In 2-way stereo mode the controls are marked BELOW the horizontal blue line. Channel One and Channel Two functions are identical in the stereo mode. LEDs are disabled for controls which are non-functional in this mode.  &   &   &   &   &   &   &   &   INPUT GAIN LOW CUT LOW/HIGH X10 LED LOW OUTPUT PHASE INVERT HIGH OUTPUT PHASE INVERT STEREO Controls the INPUT level with +/- 12 dB of gain. Switch for selecting the 40 Hz high pass filter. An LED indicates the selection. Selects crossover point between the LOW and HIGH outputs. Indicates that the LOW/HIGH crossover frequency range is 450 Hz to 9.6 kHz. Controls the Low Frequency output level with a range of - to +6 dB. Switch for reversing the polarity on the Low Output. An LED indicates the selection. Controls the High Frequency output with a range of - to +6 dB. Switch for reversing the polarity on the High Output. An LED indicates the selection. LED indicating stereo mode operation.
MONO 3 -WAY MODE
In 3-way mono operation the controls are marked ABOVE the horizontal blue line. Front panel controls not described in this section are not active in mono 3-way mode. LEDs are disabled for controls which are nonfunctional in this mode.
          
INPUT GAIN LOW CUT LOW/MID X10 LED MID/HIGH X10 LED LOW OUTPUT PHASE INVERT MID OUTPUT PHASE INVERT HIGH OUTPUT PHASE INVERT MONO
Controls the input level with +/- 12 dB of gain. Switch for selecting the 40 Hz high pass filter. An LED indicates the selection. Selects crossover point between LOW and MID frequencies. Indicates that the LOW/MID crossover range is 450 Hz to 9.6 kHz. Selects the crossover point between MID and HIGH frequencies. Indicates that the MID/HIGH crossover frequency range is 450 Hz to 9.6 kHz Controls the LOW frequency output level with a range of - to +6 dB. Switch for reversing the polarity on the Low Output. An LED indicates that the phase is reversed. Controls the MID frequency output level with a range of - to +6 dB. Switch for reversing the polarity on the Mid Output. An LED indicates that the phase is reversed. Controls the HIGH frequency output level with a range of - to +6 dB. Switch for reversing the polarity on the High Output. An LED indicates that the phase is reversed. LED indicating mono mode operation.
The mode switches on the back panel of the unit are used to select one of the three modes of operation in the 234/234XL and one of two modes of operation in the 223/223XL. There could be disastrous consequences if the crossover were improperly setup or the switches were mistakenly pushed during the regular operation of a sound system. Therefore great care should be taken when setting these switches. There is a mode diagram on the back panel to help you understand at a glance how this is done. The following steps should be taken in setting up your system: Know the loudspeaker manufacturers requirements regarding the amplification needs of your particular speaker system. Follow the maunfacturers guidelines carefully, as dbx is not responsible for damage relating to improper setup or implementation of the 234/234XL223/223XL. Without any audio or power connections in place, use the back panel switches on the crossover to set it to the proper mode of operation; either stereo 2-way, stereo 3-way, or mono 4-way for the 234/234XL, or stereo 2-way or mono 3-way for the 223/223XL. Use the literature that came with your speaker system to properly set up the mode of operation and crossover frequencies to the manufacturers specifications. There is one of the four possible mode button combinations for the 234/234XL which is marked not valid. Be sure you have not selected this combination as the 234/234XL will not operate correctly in this mode.
234/234XL-223/223XL REAR PANEL OPERATIONS
234XL REAR PANEL
234 REAR PANEL
STEREO 3-WAY STEREO 2-WAY
HIGH HIGH MID NOT USED LOW LOW LOW/MID LOW/HIGH x1 x 10 INPUT INPUT
STEREO 3-WAY STEREO 2-WAY NOT VALID
LOW SUM LOW SUM NORMAL SUMMED HIGH HIGH
MID NOT USED LOW/LF SUM LOW/LF SUM LOW/MID LOW/HIGH x1 x 10 INPUT INPUT
A HARMAN INTERNATIONAL COMPANY SALT LAKE CITY, UTAH MADE IN USA MODEL 234
100V 50/60Hz 120V 60Hz
When you are certain that the proper selections have been made, complete the steps described below and in the 234/234XL-223/223XL Audio Connections section on page 7.
On the back panel of the 234/234XL, there are markings to help you connect the source devices and amplifiers to your crossover. To operate the 234/234XL in stereo 3-way operation, follow the top row of markings horizontally along the length of the 234/234XL. For stereo 2-way operation of the 234/234XL, use the second row of markings directly above the connectors. For mono 4-way operation of the 234/234XL, use the markings directly below the connectors. The connectors not used in the selected mode are marked not used. This designation applies only to that mode of operation.
223XL REAR PANEL
223 REAR PANEL
HIGH LOW LOW/HIGH x1 x 10 INPUT
STEREO STEREO MONO
LOW SUM NORMAL SUMMED HIGH
LOW/LF SUM LOW/HIGH x1 x 10 INPUT
A HARMAN INTERNATIONAL COMPANY SALT LAKE CITY, UTAH MADE IN USA MODEL 223
234/234XL-223/223XL AUDIO CONNECTIONS
The 223/223XL is marked in a similar way: for stereo 2-way operation use the markings above the connectors. To operate the 223/223XL in mono 3way mode use the markings below the connectors. The connectors which are not used in the selected mode are marked not used. This designation applies only to that mode of operation. Before connecting anything to the crossover, make sure it is not connected to any power source. Be sure that the source device (equalizer, compressor, mixing console, etc.) for the 234/234XL-223/223XL is turned off. Connect the output(s) of the source device to the inputs of the crossover, following the rear panel markings carefully. Make sure that the amplifiers which will be used to drive your speaker system are turned off. Using the back panel markings as a guide, use high quality cables to connect the amplifiers to the appropriate outputs of the 234/234XL-223/223XL. Ensure that your 223/223XL/234/234XL crossover conforms to the AC power specifications in your area, by checking the marked voltage spec on the rear of the unit. Never plug the incorrect voltage into your
crossover, as this may cause severe damage not covered under the dbx warranty. Connect the power cord to the crossover first, then to a power source that is properly grounded. Never lift the ground as a shock hazard may result. After you have safely plugged in the crossover, turn on the source device(s). Turn the amplifiers outputs all the way down (-) and turn on the amplifiers. All of the elements of your sound system should now be on, and the amplifiers should be turned all the way down. Turn the source device to its nominal operating level, sending a nominal (average) level to the 234/234XL-223/223XL. Slowly turn up the amplifiers outputs until you can hear signal at a comfortable volume. Make adjustments as you desire.
If you are using your system in stereo 2-way or 3-way mode, the needed crossover frequency may be higher than 960 Hz, making it necessary to set the x10 switch to the active position. This changes the range of operation of the frequency selector from 45-960 Hz to 450 Hz to 9.6 kHz. All other frequency selectors remain the same. When using the X10 switch, ALWAYS ensure that the amplifiers feeding all speaker systems are turned off or that the input gain controls on the power amplifiers are turned down before changing the setting of the X10 switch. Not doing so may send a spurious signal to the outputs of the crossover when the X10 switch is engaged, and may damage speaker systems which are powered at the time of the spurious signal. Every output is equipped with a polarity () reverse switch on the front panel. When speakers are not in phase, the frequency response of the system is compromised, particularly in the low frequencies. Out of phase signals can also cause comb-filtering in the high frequencies. The polarity switch is extremely useful for fine tuning your sound system for peak performance. An LED is activated when the output polarity is reversed. The other feature accessed on the back panel is low frequency summing. This is useful with systems that utilize mono subwoofers. Activating the LF sum switch sums the low frequencies of both the left and right inputs. The sum is sent to channel ones low output marked LF SUM, while channel twos low output is not used, and channel twos phase invert led is disabled, indicating it is not operational in LF Sum mode. The summed low frequencies represent all the low frequencies of both the left and right inputs, and since lows are generally non-directional
LOW FREQUENCY SUMMING
anyway, it will not detract from the true stereo picture of the source material. We have provided 4 rack screws and washers for easy mounting in standard audio racks. You should avoid mounting the unit near large power transformers or motors. Route the AC cord away from audio lines and plug it into a power source close by. If the power cord must cross over audio lines, you should take care to have them cross at 90 degree angles.
RACK MOUNTING, GROUNDING AND SAFETY
The input and output connectors are balanced/unbalanced 1/4 TRS- type connectors. The tip of the plug is wired as hot (+), the ring is wired as cold (-), and the sleeve is wired as the ground or shield. The 234/234XL-223/223XL crossovers have differentially balanced input and output circuits. Balanced wiring is recommended, even with unbalanced source devices, especially when running long paths. Twin-conductor, shielded cable is more reliable since it does not depend on the shield wire itself to complete the signal connection. Using twin conductor cable, a broken shield may only result in a slight increase in noise or hum due to the lack of shielding. You may also use unbalanced cables to connect to and from the crossover. If there appears to be no power: Check that either the stereo or mono LED on the front panel of the 234/234XL-223/223XL is lit. Check that the power cord is seated properly in the back panel of the crossover and that it is plugged into an active AC power source. If there appears to be power, but no audible signal: Confirm that active audio lines are connected to the crossovers inputs and outputs. Check that both the input and output gain controls are advanced sufficiently. Check to make sure that you have turned up the amplifiers outputs. ABNORMAL AUDIO OUTPUT Ensure that the proper mode for your setup has been selected via the rear panel mode switches. Check the LF Sum switch. Check the x10 switch. This changes the range of the crossover frequency from 45 - 960 Hz to 450 Hz - 9.6 kHz.
WEAK AND/OR DISTORTED AUDIO Check that a clean signal is being fed to the crossover. Confirm that the input wiring is correct. Check that the grounds of the audio signal path and the chassis and power line of all units in the system are connected. If you suspect that the hum is caused by a ground loop: Systematically remove and/or connect the audio grounds of the devices in the signal path. Remember, for safety you must maintain connection to chassis ground. Never lift a safety ground. HUM AND/OR BUZZ
If you suspect the hum is not caused by a ground loop. Check the audio at an earlier stage in the audio chain. Low level equipment should be mounted away from power amplifiers to avoid induction of this type of hum. Be certain that all audio wiring except for loudspeaker lines is well shielded, and that low level wiring is not run parallel to and/or in close proximity to AC power wiring. Check the other equipment and the wiring to make certain that the signal is not intermittent earlier in the chain. Check the integrity of all cables using a cable tester. INTERMITTENT AUDIO
Connectors: Type: Impedance: Max Input Level: CMRR: 1/4 TRS (223/234) or XLR (234/234XL) Electronically balanced/unbalanced, RF filtered Balanced > 50 k, unbalanced > 25 k +22 dBu typical, balanced or unbalanced >40 dB, typically > 55 dB at 1 kHz
dbx 234/234XL-223/223XL SPECIFICATIONS
Connectors: Type: Impedance: Max Output Level: 1/4 TRS Impedance-balanced/unbalanced, RF filtered Balanced 200 , unbalanced 100 >+21 dBu balanced/unbalanced into 2 k or greater
Connectors: Type: Impedance: Max Output Level: XLR Electronically-balanced/unbalanced, RF filtered Balanced 60 , unbalanced 30 >+20 dBu balanced/unbalanced into 600 or greater
Bandwidth: Frequency Response: Signal-to-Noise: 234/234XL: Low Output: Low-Mid Output: Mid Output: High-Mid Output: High Output: 223/223XL: Low Output: Mid Output: High Output: Dynamic Range: THD+Noise: Interchannel Crosstalk: 20 Hz to 20 kHz, +0/-0.5 dB < 3 Hz to > 90 kHz, +0/-3 dB Ref: +4 dBu, 22 kHz measurement bandwidth Stereo Mode: Mono Mode: > 94 dB > 94 dB > 94 dB > 93 dB > 92 dB > 90 dB > 88 dB > 94 dB > 94 dB > 93 dB > 91 dB > 91 dB > < < < 106 dB, unweighted, any output 0.004% at +4 dBu, 1 kHz 0.04% at +20 dBu, 1 kHz -80 dB, 20 Hz to 20 kHz
234/234XL: Stereo Mode: Low/High: Low/Mid: Mid/High: 234/234XL: Mono Mode: Low/Low-Mid: Low-Mid/High-Mid: High-Mid/High: 223/223XL: Stereo Mode: Low/High: 223/223XL: Mono Mode: Low/Mid: Mid/High: Filter Type: 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting) 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting) 450 Hz to 9.6 kHz 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting) 450 Hz to 9.6 kHz 450 Hz to 9.6 kHz 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting) 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting) 45 to 960 Hz or 450 Hz to 9.6 kHz (x10 setting) Linkwitz-Riley, 24 dB/octave, state-variable
Front Panel: Low Cut: Phase Invert: Rear Panel: x10: Mode: LF Sum: Activates 40 Hz Butterworth, 12 dB/octave high-pass filter, one switch per channel. Inverts the phase at the output, one switch per output. Multiplies crossover frequency range by 10, one switch per channel. Selects stereo/mono and 2/3/4-way operation. Selects normal (stereo) or mono-summed low frequency operation.
Stereo Operation: Mono Operation: Low Cut: x10: Phase Invert: Green LED Yellow LED Red LED per channel Green LED per channel Red LED per output (3 per channel)
Operating Voltage: Power Consumption: Mains Connection: 100 VAC 50/60 Hz, 120 VAC 60 Hz 230 VAC 50/60 Hz 15 Watts IEC 320 receptacle
Dimensions: Weight: Shipping Weight: Note: Specifications subject to change.
1.75 H X 19 W X 6.9 D (4.4cm x 48.3cm x 17.5cm) 234/234XL: 4.0 lbs. (1.8 kg) 223/223XL: 3.7 lbs. (1.7 kg) 234/234XL: 5.8 lbs. (2.6 kg) 223/223XL: 5.4 lbs. (2.5 kg)
Manufacturers Name: Manufacturers Address:
DECLARATION OF CONFORMITY
dbx Professional Products 8760 S. Sandy Parkway Sandy, Utah 84070, USA
declares that the product: Product name: Product option: dbx223 and dbx234 None
conforms to the following Product Specifications: Safety: EN 60065 (1993) IEC65 (1985) with Amendments 1, 2, 3 CAN/CSA E65-94 EN 55013 (1990) EN 55020 (1991)
Supplementary Information: The product herewith complies with the requirements of the Low Voltage Directive 72/23/EEC and the EMC Directive 89/336/EEC as amended by Directive 93/68/EEC.
dbx Professional Products Vice-President of Engineering 8760 S. Sandy Parkways Sandy, Utah 84070, USA February 6, 1997
Your local dbx Sales and Service Office or
Harman Music Group 8760 South Sandy Parkway Sandy, Utah 84070 USA (801) 568-7638 (801) 568-7642
declares that the product: Product name: Product option: dbx223XL and dbx234XL None
dbx Professional Products Vice-President of Engineering 8760 S. Sandy Parkways Sandy, Utah 84070, USA March 9, 1999
This manual is dbx part number: 18-2155-C 03/19/99
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