Operator`s manual

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DRAWMER

Three-Band Stereo

FET Compressor

OPERATOR’S MANUAL

CONTENTS

Warranty

Safety Consideration

Chapter 1 - Introduction

Introduction

Installation

Power Connection

Audio Connections

Chapter 2 - Control Description

Control Description

Quick Setup Procedure

Chapter 3 - General Information

If a fault develops

Contacting Drawmer

Specification

Block Diagram

Recall Sheet

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Summary of content (12 pages)

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DRAWMER Three-Band Stereo FET Compressor OPERATOR’S MANUAL CONTENTS Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Safety Consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Chapter 1 - Introduction Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Installation . . . . . . . . . . . . . . . .
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COPYRIGHT This manual is copyrighted © 2014 by Drawmer Electronics Ltd. With all rights reserved. Under copyright laws, no part of this publication may be reproduced, transmitted, stored in a retrieval system or translated into any language in any form by any means, mechanical, optical, electronic, recording, or otherwise, without the written permission of Drawmer Electronics Ltd. ONE YEAR LIMITED WARRANTY Drawmer Electronics Ltd.
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CHAPTER 1 DRAWMER THREE-BAND STEREO FET COMPRESSOR INTRODUCTION The 1973 is a Three Band Compressor with the versatility, control and ability to shape sound that no full band compressor could ever provide and at an affordable price. Expanding on the renowned range of dynamics processors DRAWMER introduce an affordable Three Band Stereo FET Compressor that every engineer will completely appreciate - the 1973.
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INSTALLATION The 1961 is designed for standard 19" rack mounting and occupies 2U of rack space. Fibre or plastic washers may be used to prevent the front panel becoming marked by the mounting bolts. - Care should be taken in the choice of positioning. The unit should not be mounted where other equipment obstructs the normal air flow. The unit should not be situated near any heat source, such as a radiator, stove or a high power amplifier that would generate heat.
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AUDIO CONNECTIONS A typical setup for connecting the 1973 would be by the use of a Y-lead between the two input and output xlr’s on the rear of the 1973 and insert point for the respective channel of the desk - this would be repeated for both channels. The wiring of the Y-lead can be seen below. The inputs and outputs are electronically balanced on conventionally wired XLRs (pin 1 screen, pin 2 hot, pin 3 cold and XLR shell is connected to chassis). The operating level is nominally +4dBu.
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CHAPTER 2 CONTROL DESCRIPTION The 1973 shares similar parameters to a standard full band compressor, such as the Drawmer 1968, the difference being that the stereo signal is split into low, mid and high bands, each one processed separately without affecting the other, and then summed back into a stereo signal again before output.
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The following diagram provides a good, but general, idea of some useful frequencies that will aid in setting the crossover frequencies: LOW BAND, MID BAND, HIGH BAND 3 Threshold: infinity - -32dB all bands Determines the level below which compression starts to take place. The 1973 incorporates a Soft Knee, more compression is applied automatically as the input signal level increases, negating the need for a Ratio control.
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Big: Off - On low band only Big is located only on the low band and when on reduces the side-chain's sensitivity to low frequencies, with the result that less gain reduction is applied, creating the effect that the bass is louder or 'bigger'. The 'BIG' mode enables application in buss compression situations where you still want thick and warm tone yet complete dynamics control.
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QUICK SETUP PROCEDURE Please note that the following procedure is only a guide. All audio is different, requiring numerous settings, however, this should give a good staring point: 1) Set the compressor settings to be the same on all bands - Threshold fully counter-clockwise, Gain at 0dB, the Attack in a mid position (2 or 3) and Release set to F(ast). The overall Gain control should be set to 0dB, and the Mix at 0 (Wet).
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CHAPTER 3 GENERAL INFORMATION IF A FAULT DEVELOPS CONTACTING DRAWMER For warranty service please call Drawmer Electronics Ltd. or their nearest authorised service facility, giving full details of the difficulty. Drawmer Electronics Ltd., will be pleased to answer all ap plic atio n qu estion s to enh an ce you r usag e of this equipment. Please address correspondence to: A list of all main dealers can be found on the Drawmer webpages.
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BLOCK DIAGRAM 1973 ver 01 A 04/02/14 DRAWMER 1973 OPERATOR’S MANUAL 11
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DRAWMER 1973 OPERATOR’S MANUAL