Drawmer 1968 User Manual

DRAWMER

Dual Channel

Vacuum Tube Compressor

OPERATOR’S MANUAL

Warranty Safety Consideration

Chapter 1 - Introduction

Introduction Installation Audio Connections Power Connection

Chapter 2 - Control Description

Control Description The Quick Setup Procedure

Chapter 3 - General Information

If a fault develops Contacting Drawmer Specification Block Diagram

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CONTENTS

This manual is copyrighted

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., warrants the Drawmer 1968 MkII Dual Channel Vacuum Tube Compressor to conform substantially to the specifications of this manual for a period of one year from the original date of purchase when used in accordance with the specifications detailed in this manual. In the case of a valid warranty claim, your sole and exclusive remedy and Drawmer’s entire liability under any theory of liability will be to, at Drawmer’s discretion, repair or replace the product without charge, or, if not possible, to refund the purchase price to you. This warranty is not transferable. It applies only to the original purchaser of the product.

For warranty service please call your local Drawmer dealer. Alternatively call Drawmer Electronics Ltd. at +44 (0)1709

527574. Then ship the defective product, with transportation and insurance charges pre-paid, to Drawmer Electronics Ltd., Coleman Street, Parkgate, Rotherham, S62 6EL UK. Write the RA number in large letters in a prominent position on the shipping box. Enclose your name, address, telephone number, copy of the original sales invoice and a detailed description of the problem. Drawmer will not accept responsibility for loss or damage during transit.

SAFETY CONSIDERATIONS

REPLACE THE MAINS FUSE ONLY WITH

A FUSE THAT CONFORMS TO IEC127-2.

250 VOLT WORKING, TIME DELAY TYPE

RATED AT 230V=T160mA and 115V=T315mA.

DRAWMER

1968 MkII

Dual Channel

Vacuum Tube Compressor

CAUTION - MAINS FUSE

TO REDUCE THE RISK OF FIRE

AND BODY SIZE OF 20mm x 5mm.

THE MAINS INPUT FUSE MUST BE

This warranty is void if the product has been damaged by misuse, modification or unauthorised repair.

THIS WARRANTY IS IN LIEU OF ALL WARRANTIES, WHETHER ORAL OR WRITTEN, EXPRESSED, IMPLIED OR STATUTORY. DRAWMER MAKES NO OTHER WARRANTY EITHER EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. PURCHASER’S SOLE AND EXCLUSIVE REMEDY UNDER THIS WARRANTY SHALL BE REPAIR OR REPLACEMENT AS SPECIFIED HEREIN.

IN NO EVENT WILL DRAWMER ELECTRONICS LTD. BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT IN THE PRODUCT, INCLUDING LOST PROFITS, DAMAGE TO PROPERTY, AND, TO THE EXTENT PERMITTED BY LAW, DAMAGE FOR PERSONAL INJURY, EVEN IF DRAWMER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Some states and specific countries do not allow the exclusion of implied warranties or limitations on how long an implied warranty may last, so the above limitations may not apply to you. This warranty gives you specific legal rights. You may have additional rights that vary from state to state, and country to country.

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.

In the interests of product development, Drawmer reserve the right to modify or

improve specifications of this product at any time, without prior notice.

DRAWMER 1968 MkII OPERATOR’S MANUAL

CHAPTER 1

DRAWMER

1968 MkII

DUAL CHANNEL VACUUM TUBE COMPRESSOR

INTRODUCTION

The 1968 MkII is a 1U Tube/FET dual channel / ‘stereo

bus’ compressor which by design delivers a transparent

‘open’ sound even during periods of heavy compression.

The original Drawmer 1960 used a tube stage at the front

of the compressor, whilst the 1968 MkII utilisies a J-FET

(Field Effect Transistor) gain reduction circuit that operates

faster than an opto-isolator. The compressor uses a 12AX7

tube makeup gain amplifier where you can add, with the

Output Gain control, up to 20 dB of additional gain.

The need for a ratio control has been removed as the

compressor operates on the soft knee principle where the

onset of compression is progressive.

The 1968 MkII expands attack times to six choices: 2, 9,

15, 25, 30 and 50 ms. Release times come in three fixed

times (100ms, 500 ms and 1 second) and three program-

dependent choices--200 ms to 2 sec, 500 ms to 5 sec

and 1 to 10 seconds--all program-dependent and

automatic.

The 1968 MkII provides full sidechain access for connecting

an external equalizer for vocal stressing or de-essing.

Featured on both channels is a switchable ‘BIG’ and

‘BIGGER’ mode which applies less processing to the

fundamental low frequency but still disciplines the upward

associated harmonics which if untamed can result in a

‘boomy’ or ‘boxy’ sound. The result - a solid bottom end

with enhanced sub-bass and a smoother, wider frequency

response overall. This lets the operator use more

compression on an overall mix with less pumping action

caused by a kick and/or bass instrument.

The outputs of Channels 1 and 2 are monitored on two

yellow illuminated VU meters - with a red warning glow to

signify ‘approaching clipping’. A three-position switch

adjusts the meters to show either normal output level, gain

reduction or VU +10dB mode, which re-scales the meter

for users working at ‘hot’ output levels.

An output switch selects normal compressor output, hard-

wired bypass and sidechain listen.

The key features are as follows:

• 2 Channel Tube/FET Compressor

• 2 soft-knee compressors with variable threshold, attack, release and output gain

• Switchable BIG and BIGGER control on each channel

• Dual mono or true stereo link operation

• Side chain access and side chain listen facility

• VU metering of gain reduction and output levels

• Switchable +10dB mode on VU re-scales the meter for users working at ‘hot’ output levels.

• VU red warning glow to signify ‘approaching clipping’

• Balanced +4dB XLR in/outs

DRAWMER 1968 MkII OPERATOR’S MANUAL

+ 7 hidden pages