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DL441 OPERATORS’ MANUAL

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DRAWMER DL441

Quad Compressor Limiter

SAFETY CONSIDERATIONS

CAUTION - MAINS FUSE

TO REDUCE THE RISK OF FIRE REPLACE THE MAINS FUSE ONLY WITH

THE SAME TYPE, WHICH MUST BE A CLASS 3, 230 VOLT, TIME DELAY

TYPE, RATED AT 63mA WHERE THE MAINS INPUT VOLTAGE SWITCH IS

SET TO 230 VOLTS AC. AND 125mA WHERE THE MAINS INPUT VOLTAGE

IS 115 VOLTS AC.

ALL FUSES MUST COMPLY WITH IEC 127-2.

 THE FUSE BODY SIZE IS 20mm x 5mm.

CAUTION - MAINS CABLE

DO NOT

 ATTEMPT TO CHANGE OR TAMPER WITH THE SUPPLIED MAINS

CABLE.

CAUTION - SERVICING

DO NOT

 PERFORM ANY SERVICING. REFER ALL SERVICING TO

QUALIFIED SERVICE PERSONNEL. 

WARNING

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE

THIS EQUIPMENT TO RAIN OR MOISTURE.

Summary of Contents for dl441

Page 1: ...ERATIONS page 1 INTRODUCTION page 2 INSTALLATION page 3 CONTROL DESCRIPTIONS page 5 C Compressor page 5 C Peak Limit page 6 C Stereo Link page 6 OPERATION page 7 IF A FAULT DEVELOPS page 8 CONTACTING...

Page 2: ...umber copy of the original sales invoice and a detailed description of the problem Drawmer will not accept responsibility for loss or damage during transit This warranty is void if the product has bee...

Page 3: ...INPUT VOLTAGE SWITCH IS SET TO 230 VOLTS AC AND 125mA WHERE THE MAINS INPUT VOLTAGE IS 115 VOLTS AC ALL FUSES MUST COMPLY WITH IEC 127 2 THE FUSE BODY SIZE IS 20mm x 5mm CAUTION MAINS CABLE DO NOT AT...

Page 4: ...ue stereo operation Traditionally soft knee compressors are preferable for unobtrusive level control or for the control of finished mixes whereas ratio type compressors are generally considered more s...

Page 5: ...it maybe exposed to high levels of disturbance such as found close to a TV or radio transmitter we advise that the unit is operated in a balanced configuration The screens of the signal cables should...

Page 6: ...apping screws holding the voltage selection switch cover plate on the rear panel 3 Remove the cover plate and slide the switch fully to its opposite end 4 Rotate the cover plate one half turn 180E and...

Page 7: ...ximately 15dB above which level conventional ratio compression is applied For this reason the signal level may appear to fall when the compressor is switched from Hard to Soft Knee operation and some...

Page 8: ...al will not be permitted to exceed This limiter is very fast acting enabling it to control any peaks without audible distortion If the output signal is so high as to cause the limiter to operate for m...

Page 9: ...d partly by observing the gain reduction meter Normally a maximum gain reduction of between 8dB and 12dB will be adequate If more gain reduction appears necessary it is worth considering applying a co...

Page 10: ...riginal sales invoice and a detailed description of the problem Authorised returns should be prepaid and must be insured All Drawmer products are packaged in specially designed containers for protecti...

Page 11: ...er than 40dB 20Hz to 10kHz NOISE AT UNITY GAIN reference 4dBu Wideband 22Hz 22KHz CCIR ARM IEC A Q Pk CCIR AV 90dB 98dB 99dB 100dB 88dB RMS 89dB 96dB 97dB 98dB DISTORTION 100Hz 1KHz 10KHz Unity Gain 4...

Page 12: ...DL441 OPERATORS MANUAL 10 BLOCK DIAGRAM...

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