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4U USER MANUAL t
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A Series
Professional Power Amplifiers
Minimum 4 ohm
Minimum 2 ohm
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A500 A700v A750 A1000 A1004 A1500 Q6 Q1004 QB1000/600
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A2000 A3000 A4000 A5000 A5003 A6000 Q900
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INSTALLATION
UNPACKING PLEASE READ THIS SECTION BEFORE USING THE AMPLIFIER. IF YOU HAVE ANY QUERIES, CONSULT AN AUTHORISED CHEVIN DEALER The carton contains the amplifier and: A700v: 1 x Neutrik Speakon plug Q6, Q1004, QB1000/600, Q900: 4 x Neutrik Speakon plugs All other models: 2 x Neutrik Speakon plugs User manual & warranty card Please make a note of the serial number (on rear panel) Please complete & return the warranty card. Failure to register may result in delays if you require warranty service. Full warranty details are at the back of this manual. ? IF ANY ITEM IS MISSING OR DAMAGED, CONTACT YOUR DEALER IMMEDIATELY. A Series amplifiers draw in air at the back and expel it at the front: keep front & back of unit free of obstruction. The amplifier may be used free-standing or installed in a 19" rack. If installed in a rack, the rear of the chassis should be supported. Rear rack-mount supports are integral on all models except the A500 & A700v. The amplifier is factory set to your local supply voltage WARNING: THE VOLTAGE SHOULD ONLY BE CHANGED BY AN AUTHORISED CHEVIN DEALER The A500 & A700v connect to the mains supply via a detachable power cable with integral connector (supplied). All other models connect to the mains supply via a fixed power cable, colour coded to European standard: Green/Yellow = Earth Blue=Neutral Brown= Live N.B. The live connector in certain 115V models is coloured RED. The amp must be connected to a 3-pin grounded outlet via a 3-pin connector of sufficient voltage and current rating. If the connector has provision for a fuse, a suitable fuse must be fitted. The A5000, A6000 and Q900 have 2 power cables WARNING: ALL CHEVIN AMPLIFIERS MUST BE EARTHED
COOLING & ENVIRONMENTAL
VOLTAGE SELECTION AC WIRING
MAINS POWER SUPPLY THREE PHASE SYSTEMS
The power rating of the supply should be at least twice the total audio output of the system. ELECTRIC SHOCK/FIRE HAZARD: The unit must be connected to an adequately rated grounded outlet. All cables, switch gear et al must be adequately rated to avoid risk of overheating & fire. The neutral current will not balance on three-phase systems. Use individual neutral connections from each phase outlet back to the distribution point. Alternatively, ensure the neutral conductor is of sufficient capacity to handle a return current equal to the sum total of the current in the three phases. All amplifiers are fitted with XLR connectors on the inputs. All inputs are electronically balanced and can accept signal from balanced & unbalanced sources. A500 and A700v: One female XLR connector on the input of each channel. A750, A1000, A1004, A1500, A2000, A3000, A4000, A5000, A5003, A6000, Q900: One male & one female XLR connector on the input of each channel. These connectors are wired in parallel. Q6, Q1004 & QB1000/600: One female XLR connector on the input of each channel. N.B. The amps are not mixing amplifiers: do not directly connect any channel to more than 1 signal source. Maintain the same phase polarity on all equipment in signal chain. PIN WIRING - MALE & FEMALE XLR INPUT SOCKETS PIN 1: GROUND, connects directly to chassis PIN 2: HOT (+) PIN 3: COLD(-) CONNECTION TO BALANCED SOURCES 1. Fit XLR connectors at both ends of the cable. 2. PIN 1 connects via the cable braid (screen). Always connect the screen at both ends of the cable. 3. PINS 2 & 3 connect via the two signal wires of the cable. CONNECTION TO UNBALANCED SOURCES 1. At the SOURCE END of the cable, the cable screen & cold (-) signal wire connect to the chassis of the 2. source equipment via the sleeve of the jack plug/phono connector/PIN 1 of the XLR-type plug. The signal carrying conductor (which connects to PIN 2 of the XLR at the amp end) connects to the HOT output terminal of the source equipment via the jack plug tip/phono connector pin/signal-carrying XLR pin
INPUT CONNECTIONS
INSTALLATION
OUTPUT CONNECTIONS Connection is made to the amplifier's load via Neutrik Speakon sockets. As with input connectors, maintain phase polarity throughout the system. 1 Speakon socket per channel, wired as follows: 1+ = HOT 2+ = NO CONNECTION 1- = GROUND 2- = GROUND A700v 1 Speakon socket per channel, wired as follows: 1+ = HOT 2+ = NO CONNECTION 1- = COLD (not ground) 2- = NO CONNECTION WARNING: The A700v output is permanently connected in bridge mode. Both hot and cold outputs carry high level signal. Further bridging is impossible. No terminal of the speaker socket is connected to ground. Do not connect any part of the speaker system to ground. A750, A1000, A1004, A1500, A2000, A3000, A4000, A5003, Q900 2 parallel-connected Speakon sockets per channel, wired as follows: 1+ = HOT 2+ = NO CONNECTION 1- = GROUND 2- = GROUND A5000/ A6000 Two (2)parallel- connected Speakon sockets per channel, wired as follows: 1+=HOT 2+= NO CONNECTION 1-=COLD (not ground) 2-= COLD (not ground) WARNING: The A5000 &A6000 outlets are permanently connected in bridge mode. Both hot & cold outputs carry high level signal. Further bridging is impossible. Do not connect any part of the A5000 and A6000 outputs to the ground. Take care when using loudspeaker controllers or processors. Speakon A500 Socket Wiring
Q6, Q1004
One Speakon socket per channel, parallel connected in channel pairs: A&B, C&D. Each socket in the pair carries the output of both channels. Wiring as follows: Channel A socket (600 watts) carries its own & Ch. B's 600 watt output. Channel B socket (600 watts) carries its own & Ch. A 's 600 watt output. The same applies to Channel C & D sockets. Channel A & C Sockets: 1+ = HOT (Ch. A & C output) 1- and 2- = GROUND 2+ = HOT (Ch. B & D output, respectively) Channel B & D Sockets: 2+ = HOT (Ch. B & D output) 1- and 2- = GROUND 1+ = HOT (Ch. A & C output, respectively) QB1000/600 One Speakon socket per channel, internally configured as follows: Channel A socket (600 watts) carries both its own & Ch. B's 1000 watt output. Channel B socket carries only its own 1000 watt output. Channel C socket carries only its own 1000 watt output. Channel D socket (600 watts) carries both its own & Ch. C's 1000 watt output. Outer sockets Ch A & D: 1+ = HOT (600 watts output) 1- and 2- = GROUND 2+ = HOT (1000 watts output) 1- and 2- = GROUND Inner sockets Ch B & C: 2+ = HOT (1000 watts output) 1- and 2- = GROUND WARNING: High voltages are present at output terminals during operation & for a period afterwards. Do not connect the amp output to any other amp output or to any other equipment except a loudspeaker system 2 1800 2300 3000 3600 4500 2300
Loudspeaker Suggested speaker ratings, per amplifier channel, in watts. Power Ratings MODEL 16 8 4 A500 115 230 460 A750 160 300 600 A1000/Q6 230 450 900 A1004/Q1004 400 750 1500 A1500 500 1000 1900 QB1000/600 A&D 230 450 900 B&C 400 750 1500 A2000 230 500 1000 A3000 350 650 1300 A4000 450 800 1500 A5003/A5000 500 1000 2000 A6000 800 1200 2600 Q900 350 650 1300
INSTALLATION
Loudspeaker Impedance Correct total loading for the amplifiers is as follows. Multiple speakers are connected in parallel A500, A750, A1000, A1004, A1500, Q6, Q1004, QB1000/600 per channel 4 or less speakers of 16 OR 2 or less speakers of 8 OR 1 speaker of 4 WARNING: Do not use a system with a total impedance per channel of under 4 ohms A2000, A3000, A4000, A5003, A5000, A6000, Q900 per channel 8 speakers or less of 16 OR 2 or less speakers of 4 A700V Loudspeaker Power Ratings & Impedance OR 4 or less speakers of 8 OR 1 speaker of 2
WARNING: Do not use a system with a total impedance per channel of under 2 ohms. Power Handling. The A700v can be used to drive a 70 volt distribution system or to drive a conventional system, as follows: Line Operation 70 volt (maximum loading 600 watts) Can drive 100 volt line system at reduced output. N.B. Don't connect a transformer between the A700v output and distribution system Where line transformers are used to match speakers to the distribution system, adjust to suit characteristics of the speaker. Conventional Speaker System A700v 16 8 4 2 450 900 -
WARNING: Do not use a system with a total impedance per channel of under 8 ohms. PRE-SET LIMITER The A6000 and A5000 (4u) models incorporate an adjustable output limiting control, concealed behind the front panel Consult an authorised Chevin dealer if you wish to make use of this feature.
OPERATION
Power Up Connect the unit to the mains supply and switch on. The green power LEDs illuminate. The fans may run, depending on temperature. The green signal LEDs illuminate when signal is present. The red clip LEDs illuminate if overdriving is imminent. Turn the gain controls to minimum position. Switch off the amp & disconnect from the mains power supply. Mains power supply failure. When power is restored, the amp AutoMutes for 10 seconds. Please note the A500 & A700v do not AutoMute. Do not increase gain settings during this period. Shorted output. The unit can operate indefinitely into a shorted output. Normal operation will resume upon removal of the short circuit. Low load impedance. Protection is immediate. Clipping. The affected channel's red Clip LED illuminates shortly before clipping. A further increase in signal level will activate the soft-clip circuit. RF, DC or very low frequency signal at output. A self-resetting circuit activates to protect the load. Cooling systems. The internal fans react to both signal level and temperature inside the unit. If the ambient temperature is high, fan speed will increase even in the absence of signal. WARNING: keep sound levels down! High levels of sound can damage hearing.
Power Down Protection Systems
Sound Levels
SERVICING
Maintenance WARNING: ALL SERVICING AND INTERNAL MAINTENANCE MUST BE REFERRED TO AN AUTHORISED CHEVIN DEALER Do not remove any covers or touch any internal parts Do not allow any objects, for example screwdrivers or cable ends, to enter the unit. Water. If the unit or any other electrical equipment in the system becomes wet during operation, immediately disconnect the power at source. Do not touch the amplifier. Consult a qualified engineer Mechanical. If there are any signs of mechanical damage - for example, broken parts, covers or fans guards pushed in, loose internal parts, mains cable damage etc. - disconnect the amplifier from the mains and consult a qualified engineer. WARNING Chevin Research accepts no responsibility or liability relating to injury or damages suffered as a result of misuse or unauthorised tampering with any of its amplifiers
Damage
MONO BRIDGE MODE
WARNING: YOU CANNOT BRIDGE THE A700v, A5000 (4U), A6000 or QB1000/600 INPUT CONNECTIONS A500 1. Make a lead with a suitable connector for the source equipment and two (2) XLR plugs for the amplifier end. 2. The HOT output from the source equipment goes to Pin 2 of Ch. A XLR plug and Pin 3 of Ch. B XLR plug 3. The COLD connection from the source equipment goes to Pin 3 of Ch A. XLR plug and to Pin 2 of CH. B XLR plug 4. The cable screen connects to Pin 1 of the XLR plugs in both cases A750, A1000, A1004, A1500, A2000, A3000, A4000, A5003, Q900 1. Bring the input signal into Channel A as usual. 2. Make a link cable with XLR plugs at both ends to go from Ch. A LINK socket to Ch. B INPUT socket. 3. Pin 2 at one end connects to Pin 3 at the other end: that is, PIN 2-3 and PIN 3-2 Re the Q900: repeat the above procedure to bridge Channels C&D A500, A750, A1000, A1004, A1500, A2000, A3000, A4000, A5003, Q900 1. Split the speaker cable by separating the 2 conductors for a distance of 20cm along the cable. 2. Connect the red conductor to Terminal 1+ of the Ch. A Speakon connector 3. Connect the black conductor to Terminal 1+ of the Ch. B Speakon connector Re the Q900: repeat the above procedure to bridge Channels C&D WARNING: Do not make connections to any other terminals. Set both channels' gain controls in the same position, preferably at maximum, and control the gain from elsewhere in the system. This ensures the load is shared equally between channels. A500 A750 A1000 A1004 A1500 A2000 A3000 A4000 A5003/A5000 Q900 Q6, Q1004 INPUT CONNECTIONS Make a lead with a connector at the source end and two (2) XLR plugs at the amp end. Wiring as follows: 1. The source equipment HOT output goes to PIN 2 of Ch. A (C) XLR plug and PIN 3 of Ch. B (D) XLR plug. 2. The COLD connection from the source equipment must go to PIN 3 of the Ch. A (C) XLR plug 3. OUTPUT CONNECTIONS 1. 2. and PIN 2 of the Ch. B (D) XLR plug. The cable screen connects to PIN 1 of the XLR plugs in both cases. Connect the RED conductor of the speaker cable to Terminal 1+ of Ch. A (C) Speakon connector. Connect the BLACK conductor of the speaker cable to Terminal 2+ of Ch. B (D) Speakon connector. WARNING: Do not make connections to Terminals 1- or 2-. one (1) load of 8 minimum. one (1) load of 8 minimum. one (1) load of 8 minimum. one (1) load of 8 minimum. one (1) load of 8 minimum. one (1) load of 4 minimum. one (1) load of 4 minimum. one (1) load of 4 minimum. one (1) load of 4 minimum. one (1) load of 4 minimum per channel pair. Power output is 650 watts. Power output is 850 watts. Power output is 1200 watts. Power output is 2000 watts. Power output is 2500 watts. Power output is 2400 watts. Power output is 3000 watts. Power output is 4000 watts. Power output is 5000 watts. Power output is 3000 watts per channel pair.
OUTPUT CONNECTIONS
OPERATION LOADING & POWER OUTPUT
OPERATION LOADING & POWER OUTPUT
Set both channels' gain controls in the same position, preferably at maximum, and control the gain from elsewhere in the system. This ensures the load is shared equally between channels. Q6 one (1) load of 8 minimum per channel pair. Power output is 1200 watts per channel pair. Q1004 one (1) load of 8 minimum per channel pair. Power output is 2000 watts per channel pair.
FRONT PANELS
A500
A700V
A750, A1000, A1004, A1500, A2000, A3000
A4000, A5003
Q6
Q1004, QB1000/600
Q900
1. Power Switch 2. Output Controls 3. Power LEDs 4. Clip LEDs 5.Singnal LEDs A5000 & A6000
Controls the mains power supply to the amplifier Controls the output level (gain) of each channel Top green LEDs. They illuminate when the unit is ON Red LEDs, one per channel. They illuminate when the unit is being driven into clip and indicate the SoftClip system is active. Bottom green LEDs. They illuminate when the signal is present On the A500 & A700V, the signal LEDs are in the middle.
1. Power Switch 2. Output control 3. Output Bargraph
Controls the mains power supply to the amplifier Controls the output level (gain) of each channel Power LED. The bottom green LED, illuminates when the unit is ON Output Voltage LEDs. The column of green LEDs above the power LED. These give indication of the output voltage. Output power willl be determined by load impedance. Illumination of the 70V LED indicates imminent clipping. Clip LED. The top red LED. It illuminates when the amplifier is being driven into clip and indicates the SoftClip system is active. If the Clip threshold is exceeded, the intensity of this LED provides an indication of the degree of overdrive.
BACK PANELS
A500
A700V
A750, A1000, A1004, A1500, A2000, A3000
Q6
QB1000/600
Q1004
A4000
A5003
5
5
1
4
2
4
3
Q900
A5000/A6000
1. Vari Speed Fans 2. Mains Input 3. Mains Fuse 4.Output Connectors
On the A500 & A700V, the fan is internal. On all other models, fans are at the back. These spin at variable speeds depending on the signal level and ambient temperature On the A500 & A700V, mains input is via a detachable 3-core main cable with integral connector. All other models have a fixed, high current 3-core mains cable. Wiring as per standard European colour coding. Correct fuse rating indicated on the back panel legend. Please note the A5003 fuse is internal
Neutrik Speakon sockets. Pin wiring indicated on legend A500, A700, Q6, Q1004, QB1000/600: One per channel A750, A1000, A1004, A1500, A2000, A2500, A3000, A4000, A5000, A5003. A6000, Q900: Two per channel XLR sockets. Pin and wiring indicated on legend. A500, A700v, Q6, Q1004, QB1000/600: One female XLR connector per channel. A750, A1000, A1004, A1500, A2000, A2500, A3000, A4000, A5000, A5003, A6000, Q900 One male and one female XLR connector per channel.
5. Input Connectors
SPECIFICATIONS
Specifications A500
RMS Power Output into 4, watts per channel into 8, watts per chanel No of Channels Power Bandwidth +0dB, - 3dB Slew Rate in excess of Gain Total Harmonic Distortion Typical @ 1 dB below clip 20kHz @ 1dB below clip Signal to Noise Ratio Typical ref. full output, unweighted Worst case 10Hz - 30kHz Crosstalk Typical Worst case 10Hz - 30kHz Damping Factor Input Impedance electronically balanced Common Mode Rejection typically Input Sensitivity ref. full output into 4 ohms Protection Clipping Soft
Soft
A1000 A1004 A1500
600 350 2 2Hz-80kHz 75V/s x 50 0.04% 0.07% -125dB -95dB -115dB -95dB 400 10k Ohm -70dB IV RMS
Q6
600 350 4 2Hz-80kHz 75V/s x 50 0.04% 0.07% -125dB -95dB -115dB -95dB 400 10k Ohm -70dB IV RMS Soft
Q1004
1000 600 4 2Hz-80kHz 75V/s x 65 0.04% 0.07% -125dB -95dB -115dB -95dB 400 10k Ohm -70dB IV RMS Soft
QB1000/600
2 x 1000/ 2 x 600 2 x 600 / 2 x 375 4 2Hz-80kHz 75V/s x 65 / x 50 0.04% 0.07% -125dB -95dB -115dB -95dB 400 10k Ohm -70dB IV RMS Soft Dynamic linear Immediate 5.2kVA 220- 240v 100- 120v 3u 5.25 x 19 x 15 132 x 483 x 381 20kg/44lbs 18kg/40.5lbs
350 200 2 2Hz-40kHz 40V/s x 37.5 0.06% 0.08% -120dB -95dB -115dB -95dB 400 10k Ohm -70dB IV RMS
1000 600 2 2Hz-80kHz 75V/s x 65 0.04% 0.07% -125dB -95dB -115dB -95dB 400 10k Ohm -70dB IV RMS Soft
1250 650 2 2Hz-80kHz 60V/s x 70 0.04% 0.07% -125dB -95dB -115dB -95dB 400 10k Ohm -70dB IV RMS Soft
Load Below 2.4 ohms Dynamic linear Dynamic linear Dynamic linear Dynamic linear Dynamic linear Dynamic linear Immediate Immediate Immediate Immediate Immediate Shorted Output, DC or RF at output Immediate Power Consumption Power Requirements 50/60Hz ac in volts Internally selectable for Dimensions Rack Units 1u
2u
1.2kVA 220- 240v 100-120v
2kVA 220- 240v 100-120v
3.3kVA 220- 240v 100-120v 2u
4kVA 220- 240v 100-120v 2u
4kVA 220- 240v 100-120v 2u
6.6kVA 220- 240v N/A 3u
Height x Width x Depth in inches 1.75 x 19 x 8.5 3.5 x 19 x 15 3.5 x 19 x 15 3.5 x 19 x 15 3.5 x 19 x 15 5.25 x 19 x 15 Height x Width x Depth in mm 44 x 483 x 215 88 x 483 x 381 88 x 483 x 381 88 x 483 x 381 88 x 483 x 381 132 x 483 x 381 Weight Gross in kg/lbs 5.2kg/11.5lbs Net in kg/lbs 4.7kg/9lbs
10kg/22lbs
13.3kg/29lbs
14kg/31lbs 12.4kg/27lbs
14kg/30.9lbs 12.3kg/27lbs
16kg/34lbs 14kg/29.6lbs
8.4kg/18.5lbs 11.7kg/26lbs
SPECIFICATIONS
Specifications
RMS Power Output 10Hz-20kHz into 2, watts per channel into 4, watts per channel into 8, watts per chanel No of Channels Power Bandwidth +0dB, - 3dB Slew Rate in excess of Gain Total Harmonic Distortion Typical @ 1 dB below clip 20kHz @ 1dB below clip Signal to Noise Ratio Typical ref. full output, unweighted Worst case 10Hz - 30kHz Crosstalk Typical Worst case 10Hz - 30kHz Damping Factor Input Impedance electronically balanced Common Mode Rejection typically Input Sensitivity ref. full output into 4 ohms Protection Clipping Load Below 1.2 ohms Shorted Output, DC or RF at output Power Consumption Power Requirements 50/60Hz ac in volts Internally selectable for Dimensions Rack Units Height x Width x Depth in inches Height x Width x Depth in mm Weight Gross in kg/lbs Net in kg/lbs
13.3kg/29lbs 11.7kg/26lbs 14kg/31lbs 12.4kg/27lbs 16kg/34lbs 14kg/29.6lbs 16kg/34lbs 14kg/29.6lbs 23.5kg/59lbs 21.5kg/47.4lbs 2u 3.5 x 19 x 15 2u 3.5 x 19 x 15 3u 5.25 x 19 x 15 3u 5.25 x 19 x 15 4u 7 x 19 x 15 178 x 483 x 381 220- 240v 100-120v 220- 240v 100-120v 220- 240v N/A 220- 240v N/A 220- 240v 100-120v Soft Immediate 3.9kVA Soft Immediate 5.3kVA Soft Immediate 6.6kVA Soft Dynamic linear Immediate 8kVA Soft Dynamic linear Immediate 5.3kVA per channel Dynamic linear Dynamic linear Dynamic linear IV RMS IV RMS IV RMS IV RMS IV RMS -70dB -70dB -70dB -70dB -70dB 10k Ohm 10k Ohm 10k Ohm 10k Ohm 10k Ohm -115dB -95dB 400 -115dB -95dB 400 -115dB -95dB 400 -115dB -95dB 400 -115dB -95dB 400 -125dB -95dB -125dB -95dB -125dB -95dB -125dB -95dB -125dB -95dB 0.04% 0.07% 0.04% 0.07% 0.04% 0.07% 0.04% 0.07% 0.04% 0.07% 1200 watts 650 watts 350 watts 2 2Hz-80kHz 75V/s x 50 1600 watts 900 watts 500 watts 2 2Hz-80kHz 50V/s x 60 2000 watts 1000 watts 600 watts 2 2Hz-80kHz 65V/s x 65 2500 watts 1500 watts 900 watts 2 2Hz-80kHz 65V/s x 70 3000 watts 2000 watts 1200 watts 2 2Hz-50kHz 50V/s x 90
A2000
A3000
A4000
A5003
A6000
88 x 483 x 381 88 x 483 x 381 132 x 483 x 381 132 x 483 x 381
THE CHEVIN WARRANTY
This precision engineered CHEVIN product is guaranteed against defects due to faulty materials and workmanship for a period of 24 months from the date of the original purchase, subject to the following restrictions. This warranty is only valid in the country of purchase The equipment has not been abused or operated in conjunction with unsuitable or faulty apparatus. The equipment has not been disassembled, modified or tampered with by any person other than our CHEVIN staff or overseas by our own or distributors' staff. The equipment has not suffered damage in transit. Should service be required, notify the dealer from whom you purchased the equipment to arrange for an authorised CHEVIN agent to confirm the need for attention. Do not dispatch the goods without the prior approval of CHEVIN or its authorised agents. If asked to return the goods, pack carefully (preferably in the original carton) and return pre-paid. Insurance is recommended as goods are returned at owner's risk. Packing insurance and freight on the return journey will be paid for by CHEVIN or its authorised agents only if warranty work proves necessary. If warranty work proves unnecessary, goods will be released upon payment by the owner for charges for non-warranty repair work and return packing, insurance and freight. The attached warranty card should be completed and returned to CHEVIN RESEARCH LTD. Failure to register by not returning the warranty card in no way limits or invalidates the warranty, but in the event of service being required, delay may result since warranty work cannot begin until thje original sale has been verified. In case of difficulty, contact CHEVIN RESEARCH LTD. This warranty in no way affects your statutory rights. Head Office: Chevin Research Ltd., 41a IIkley Road, Otley, West Yorkshire LS21 3LP ENGLAND Tel: +44 (0)1943 466060 Fax: +44 (0)1943 466020 www.chevin-research.com sales@chevin-research.com Speakon is a registered trademark of Neutrik AG XLR is a registered trademark of ITT Cannon Ltd.
Trademark Acknowledgements:
This manual is intended for informational purposes only. All information included herein is subject to change without notice. Chevin Research Ltd. shall not be held responsible for any damages, direct or indirect arising from or relating to the use of this manual. c Chevin Research Ltd. 2003. All rights reserved.


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