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Drawmer DL241 User Manual

Drawmer DL241
14 pages
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DL241
DUAL AUTO COMPRESSOR
OPERATORS MANUAL
CONTENTS
SAFETY CONSIDERATIONS page 1
INTRODUCTION page 2
INSTALLATION page 3
CONTROL DESCRIPTIONS page 5
OPERATION page 8
IF A FAULT DEVELOPS page 10
CONTACTING DRAWMER page 10
TECHNICAL SPECIFICATION page 11
BLOCK DIAGRAM page 12
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Drawmer DL241 Specifications

General IconGeneral
Channels2
Input ConnectorsXLR, 1/4" TRS
Output ConnectorsXLR, 1/4" TRS
SidechainYes
Compression Ratio1:1 to ∞:1
ControlsThreshold, Ratio, Attack, Release, Bypass
Frequency Response20 Hz to 20 kHz
THD + Noise< 0.05%
Signal to Noise Ratio>90dB
Dynamic Range> 100 dB
Sidechain FilterHigh-pass filter
Power Supply115/230V AC, 50/60Hz
Dimensions482 x 44 x 200 mm

Summary

Safety Considerations

Mains Fuse and Cable Safety

Replace fuses with correct type; do not tamper with mains cable.

Servicing and Environmental Precautions

Refer servicing to qualified personnel; avoid exposure to rain or moisture.

Electrical Hazard Warning

Caution against electric shock and opening the unit.

Introduction to the DL241

DL241 Overview and Design

Dual channel compressor/limiter with expander and peak limiter for studio and live sound.

Compressor Functionality

Combines ratio and soft-knee approaches for flexible level control.

Expander Operation

Programme Adaptive expander reduces noise during pauses without affecting wanted sounds.

Peak Limiter Use

Sets an absolute output limit for fast peak control and creative effects.

Installation and Connections

Rack Mounting Guidelines

Designed for 19" rack mounting, occupies 1U; advice on heat and washers.

Audio Connection Types

Details balanced/unbalanced wiring for jacks and XLR, and operating level selection.

Interference and Ground Loop Management

Advice on managing interference and ground loop issues for optimal audio quality.

Power Connection and Voltage Selection

Voltage Selection and Fuse Replacement Procedure

Procedure to change mains voltage via rear panel switch and replace the fuse.

Control Descriptions

Expander Controls: Threshold and Release

Explains the Expander Threshold and Release controls for setting up gating action.

Compressor Controls

Compressor Threshold and Ratio

Sets input level for gain reduction and the final compression ratio.

Gain Reduction Meter and Attack/Release

Monitoring gain reduction and setting compressor response and recovery times.

Auto Mode and Gain Adjustment

Utilizing auto optimization for attack/release and adjusting output gain.

Output and Peak Limiter Controls

Output Level Meter and Bypass

Monitors output signal level and enables a hard-wire bypass of processing.

Peak Limiter Level Setting

Sets an absolute output limit to prevent peaks without distortion.

Stereo Linking Functionality

Configures stereo mode where left channel controls act as masters for both channels.

Operation Guide

Connecting and Setting Up

Connecting the unit and initial setup for single channel or stereo link modes.

Compressor/Limiter Adjustment

Setting Threshold, Ratio, Attack, and Release for optimal compression.

Expander and Gain Control

Setting expander threshold and gain control for desired output level.

Peak Limiter and Bypass Usage

Setting peak limiter and effectively bypassing compressor/limiter functions.

Troubleshooting and Contact

Handling Faults and Warranty Service

Procedure for reporting faults and obtaining warranty service.

Contacting Drawmer Support

Information for application questions and technical help line.

Technical Specifications

Input/Output and Bandwidth

Specifications for input/output impedance, level, and frequency response.

Noise and Distortion Levels

Measured noise at unity gain and distortion across different frequencies.

Power Requirements and Physical Data

Details power consumption, fuse ratings, case size, and weight.

Block Diagram

DL241 Signal Flow

Visual representation of signal paths through the unit's channels and modules.