Drawmer 1977 is a comprehensive channel strip that provides a wide range of features for shaping and enhancing your audio. With a clean preamp, precise EQ, smooth compressor, and versatile saturation, it offers exceptional control over the clarity, tone, and warmth of your recordings. The preamp boasts variable impedance matching for microphones, ensuring optimal performance from any mic. The parametric EQ allows for subtle adjustments to fine-tune your sound or more drastic changes for creative sculpting.
Drawmer 1977 is a comprehensive channel strip that provides a wide range of features for shaping and enhancing your audio. With a clean preamp, precise EQ, smooth compressor, and versatile saturation, it offers exceptional control over the clarity, tone, and warmth of your recordings. The preamp boasts variable impedance matching for microphones, ensuring optimal performance from any mic. The parametric EQ allows for subtle adjustments to fine-tune your sound or more drastic changes for creative sculpting.
DRAWMER
QUICK START GUIDE
This Quick Start Guide is copyrighted © 2023 Drawmer Electronics Ltd.
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.
DOWNLOAD MANUAL
Obtain the 1977 Operator’s Manual at
https://www.drawmer.com/uploads/manuals/1977_operators_manual.pdf
or scan the code to the left using a QR scanner app on your mobile device.
PRODUCT REGISTRATION
Register your 1977 at
https://www.drawmer.com/register.php
or scan the code to the left using a QR scanner app on your mobile device.
Congratulations on the purchase of your 1977 Channel Strip. This quick start guide should provide you with the
very basics to get you started with integrating the 1977 into your studio. More information can be found by
going to the 1977 page on the Drawmer website: www.drawmer.com.
Please address correspondence to:
DRAWMER Electronics LTD
Coleman Street
Parkgate
Rotherham
South Yorkshire
S62 6EL
United Kingdom
CONTACTING DRAWMER
We will be pleased to answer all questions to enhance your usage of DRAWMER equipment.
Telephone: +44 (0)1709 527574
E-mail: [email protected]
Further information on all Drawmer products, dealers,
Authorised service departments and other contact
information can be found on our website: www.drawmer.com
CHANNEL STRIP
Use a fast Attack (0.2mS - 100mS) to catch transients, mid speeds to control the dynamics and slow for buss
compression and drums. Release (0.05S - 2S) settings should be slow enough not to cause pumping, but fast
enough that attenuation triggered by the last note doesn’t linger into the next, this can be automated using the
PGM switch. In addition Big & Air switches are included that alter the compressor side chain to thicken the low
end and add vibrancy to the high end. Above a Gain Reduction Meter shows how many dB's the signal has been
attenuated by.
A Saturate section is located next as part of the compressor stage(see below).
During compression the signal is attenuated so gain may be required to produce the required output level using
the Make Up Gain (-10 to +20dB) control. The amount of gain required in order to bring the signal level to the
same is at input is displayed on the G.R. meter.
A fully hardwired bypass switch toggles the Compressor section to be active or not, and is best used for A/B
comparisons, or to remove the compressor stage from the signal path altogether.
SATURATE
The Saturation circuit is located as part of the compressor stage
and is used to add distortion and warm to a recording. The Saturate
Level (0 to 10) sets the amount of Saturation applied to the signal,
from very subtle, through to warm and to over-driven.
Two switches effect the Type of saturation applied. With both
switches inactive the Saturation control operates throughout the
entire frequency range, however, this can produce unwanted
harshness in the low frequencies and excessive sibilance in the high
frequencies - the switch when active cuts the low frequencies
prior to the saturation stage, thus reducing the harshness of the
saturation giving a warmer sound rather than over-distortion to the
bass. The same is true of the switch, it reduces the harshness
of the saturation in the high frequencies, with the effect of far less
sibilance than may otherwise occur.
The combination of variable Saturation plus the Type switches provide absolute control over the amount of
distortion used and allows the engineer to apply either very subtle saturation or to really drive the saturation
whilst still having control over the harshness that may occur.
VU METER & OUTPUT
A backlit moving coil VU Meter monitors the level of the output signal, this has a Pad switch that adjusts it to
show either normal output level or, for those working at ‘hot’ output levels, VU +10dB.
The overall EQ/compression/saturation of the signal can be altered using the Mix control by adjusting an
amount of the original signal (dry) with the EQ/compressed/saturated signal (wet) in an effect similar to
‘parallel compression’, and, in addition, a single Fade (Off to +12dB) control modifies the output. Adjust this
to fade out the signal or so that the output signal approaches the desired level only on signal peaks.
Finally a fully balanced hard-wire Preamp Direct switch connects the preamplifier directly to the output
without passing through the E.Q., the compressor and saturation FET’s, or the mix and gain controls at all.
Use this to provide an ultra clean microphone signal or to hear the extent of the effects in an A/B
comparison.
115V-T1A
230
SERIAL #
DATE CODE
DRAWMER ELECTRONICS Ltd
ROTHERHAM,
ENGLAND.
DRAWMER
AC POWER ONLY
50/60Hz 60 VA230V/115V
WARNING:
RISK OF ELECTRIC SHOCK!
DO NOT OPEN. LIVE PARTS INSIDE.
THIS EQUIPMENT MUST BE EARTHED.
NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICE TO QUALIFIED PERSONNEL.
CAUTION:
TO REDUCE THE RISK OF FIRE,
REPLACE FUSES ONLY WITH THE
SAME TYPE AS SHOWN
FUSES TYPE: STANDARD - IEC127-2
RATING:
INPUT
NEGATIVE
(COLD)
POSITIVE
(HOT)
SCREEN
DISCONNECT GROUND
HERE IF GROUND
HUM LOOPS OCCUR
OUTPUT
NEGATIVE
(COLD)
POSITIVE
(HOT)
SCREEN
DISCONNECT GROUND
HERE IF GROUND
HUM LOOPS OCCUR
230V=T250mA/115V=T500mA
230V=T250mA
CHANNEL
STRIP
LINEMIC
INPUT
PREAMP O/P (CLEAN)
OUTPUT SIDE CHAIN
just before it rolls off. Especially useful on kick drums, it magnifies and gives
extra weight to the hit whilst still filtering out any subsonic junk.
Similarly the High band also has a Slope switch that attenuates the High
frequencies in much the same way as the Low slope, at 6dB or 12dB’s per
octave.
In between each E.Q. band is an overload LED that illuminates to indicate
that the E.Q. section has too much overall gain in total and one, or a
combination of the three cut/boost controls should be reduced.
A fully hardwired bypass switch toggles the E.Q. section to be active or not,
and is best used for A/B comparisons, or to remove the E.Q. stage from
the signal path altogether.
COMPRESSOR
A Compression section is located at the centre bottom of the 1977 front
panel with familiar controls such as Threshold, Ratio, Attack and Release,
plus a Gain Reduction Meter, making setup easy & intuitive, as well as an
integrated Saturation section to add various levels of warmth.
Threshold (-40.0dB to +20dB) determines the input level above which soft
knee compression takes place, whilst Ratio determines the amount of
compression to be used: 1:1 provides no compression, 4:1 moderate &
10:1 is approaching limiting. cont.......
DRAWMER ELECTRONICS Ltd
Rotherham ~ S. Yorkshire ~ England
DRAWMER CH 1CH 2
INPUTINPUT OUTPUTOUTPUT
STEREO PARAMETRIC
EQUALISER
WARNING:
CAUTION:
FUSE:
FUSE RATING
AC POWER
AC POWER ONLY
TO REDUCE RISK OF FIRE REPLACE
FUSES ONLY WITH THE SAME TYPE AS SHOWN
IEC127-2
20 x 5mm
50/60Hz
T315mA
T160mA
115V
230V
DO NOT OPEN. NO USER SERVICEABLE PARTS INSIDE.
THIS EQUIPMENT MUST BE EARTHED.
RISK OF ELECTRIC SHOCK! LIVE PARTS INSIDE.
REFER SERVICE TO QUALIFIED PERSON.
SERIAL NUMBER
EQ for De-essing or Frequency Conscious Compression
1/4” JACK -
SIDE CHAIN INSERT
RETURN
SEND
SCREEN
1/4” JACK -
INSTRUMENT INPUT
HOT
SCREEN
to 1977 INSERT
TRS to XLR Y Lead (EQ insert)
Not all insert points are
wired the same - check
your user manual
TIP
RING
SLEEVE
1 SCREEN
2 HOT
SEND
RETURN
3 COLD
1 SCREEN
2 HOT
3 COLD
E.Q.>Comp / Comp>E.Q.
The 1977 has very comprehensive Equaliser and Compressor stages that
follow the Gain stage. This switch allows the signal path to either route
through the EQ first or the compressor first, as each way creates a distinctly
different tonal quality, and colouration depending on the setting.
E.Q.
The 1977 has a fully parametric three band EQ located top centre of the
front panel. Each band has fully variable frequency that allows you to sweep
and pinpoint specific frequencies (set at LOW, 40Hz to 725Hz, MID, 140Hz
to 13kHz and HIGH, 530Hz to 20kHz) and 12dB’s of Cut and Boost at the
frequencies set within the band. In addition, the MID Band has a fully variable
Bandwidth control (0.25 to 2.75 Octaves) that allows you to either tune into
problem frequencies at the narrow setting, or make more musical
alterations at the wider setting.
In addition the LOW band has a Slope switch that determines how “fast” the
signal is attenuated at the Low frequencies, set in dB’s per octave, and at 6,
9 and 12dB’s plus PEAK. 6dB being more subtle and musical, with 12dB
being more “focused” but noticeable. The Peak setting adds a narrow bell
shaped boost to the 12dB per octave low band filter at the knee frequency
Congratulations on the purchase of your Drawmer 1977, our most comprehensive channel
strip to date. The 1977 front panel is populated left to right firstly with an ultra clean
preamplifier which incorporates mic, line and instrument D.I. with 66dB of stepped gain, and
also mic matching via switched impedance that brings out the best of every mic in your studio.
In the centre of the panel is an incredibly precise three band parametric equaliser that allows
for subtle fine tuning through to signal sculpting, and underneath this a silky smooth soft knee
compressor which incorporates our trademark ‘Big’ and ‘Air’ features and also the ability to
dial in as much warmth as you desire via the 3 types of variable harmonic saturation. A switch
swaps the location of the EQ and compressor in the signal path.
To the right of the unit comes the output section, this includes a wet/dry mix for parallel
processing that allows you to easily dial in how much EQ and compression is used via a single
knob, plus a fade control and large backlit VU meter to achieve perfect output levels.
The result of all these features is a modern take on vintage gear that gives you an incredible
degree of control over
the clarity, tone and
w a r m t h o f y o u r
recordings, helping
you to capture perfect
audio every time.
The 1977 will be supplied with a
power cable and an integral fuse
suitable for domestic power
outlets in your country. If the fuse
blows or the unit is to be used with
a diffe rent mains o perat ing
voltage see the User Manual for
instructions.
Connection
Connector Wiring
1 2
3
XLR OUTPUT
(MALE)
12
3
XLR INPUT
(FEMALE)
IF GROUND HUM LOOPS
OCCUR DISCONNECT
GROUND HERE ON ONE
END OF CABLE
+ (HOT)
(COLD)
SCREEN
FOR UNBALANCED OPERATION CONNECT
PIN 3 AND PIN 1 TOGETHER
DIGITAL AUDIO
DIGITAL AUDIO
WORKSTATION
WORKSTATION
DIGITAL AUDIO
WORKSTATION
20
20
0
40 60 80100%
10 75303
VU
+
CHANNEL
STRIP
GAIN
INSTR. INSTR. THRU
O REV
OUTPUT
SELECT
2.4k
600
200
MIC Z
MIC
+48V
LOW
E.Q. HIGH
MID
SLOPE SLOPE IN
FREQUENCY FREQUENCY BANDWIDTH
/Octave dB /Octave
CUT/
BOOST
Octave
1.5
.25 2.75
.4
.7
1
1.2 1.7
2
2.3
2.6
FREQUENCY
Hz Hz
160
115 230
75 350
55
550
45 680
40 725
1.5k
1.2k 2k
800 2.6k
400
5k
250 10k
140 13k
6dB
6dB
O/LO/L
9dB
12dB
12dB
PEAK 0
12 12
6 6
4 4
2 2
10 10
dB
CUT/
BOOST
0
12 12
6 6
4 4
2 2
10 10
dB
CUT/
BOOST
0
12 12
6 6
4 4
2 2
10 10
Hz
4k
2.8k 7k
1.75k 11k
1k
15k
620 18k
530 20k
PREAMPLIFIER
:1
3
2
1.5
1.2
5
4
10
1mS
2010
50
5
1
.2 100 Sec
1.25
.375
.750
.15
.1
.25
1.5
2
.05
Hz
32 65
13016
dB
7
13
20
010
5
14
22
40 0
1 9
2 8
3 7
4 6
5
10
EQ
PGM
COMPRESSOR
SATURATE
LEVEL
BIG AIR RELEASE
GAIN
MAKE-UP IN
THRESHOLD RATIO ATTACK
30 36
24 42
18 48
12 54
660
0 66
TYPE
PGM.
EQ>
COMP
COMP
>EQ
FREQ. IN
LINE
INSTRUMENT
0
+6 +12
+18
+24
+30
+36
+42
-6
-12
-18
-24
5
1 9
2 8
3 7
46
WET DRY
dB 20
06
3
8
12
16
10
7
4
dB 12
0
10
8
2
5
OFF
20
8
5
2
MIX FADE
+10dB
PAD PREAMP
VU DIRECT
G.R.
1
-dB
25 37101520
DRAWMER
COMP.
PRE-AMP COMPRESSOR SATURATE
EQUALISERE.Q.>COMP SWITCH
OUTPUT
Layout
Controls
PREAMPLIFIER
The peamplifier section is found on the left of the 1977 front panel. A
Source Select six position rotary switch not only selects Instrument D.I.,
Line or Mic sources, but also provides three settings of load impedance at
200, 600 and 2.4k Ohms to aid the matching for a dynamic microphone. In
addition, +48V Phantom Power is available to power a condenser
microphone. NOTE: DO NOT ACTIVATE THE +48V SETTING UNLESS THE
MICROPHONE REQUIRES IT.
An Instrument Input is located in the bottom corner via a 1/4" jack, this is
excellent for use with both active and passive guitar pickup systems as well
as other instruments, such as electronic keyboards, this also has a through
output that provides an unaltered instrument signal . Microphone and line
inputs are found on the rear via XLR’s. A twelve position switch adds Gain in
6dB steps from 0dB to +66dB, making it incredibly easy to have total
control over levels.
The section also includes a Phase Reverse switch that is used should there
be polarity issues, and a variable High Pass Filter that attenuates the audio
between 16 and 130Hz at a slope of 12dB per Octave to remove rumble
etc. that can be switched in or out of the signal path.
-
1
-
2
Drawmer 1977 is a comprehensive channel strip that provides a wide range of features for shaping and enhancing your audio. With a clean preamp, precise EQ, smooth compressor, and versatile saturation, it offers exceptional control over the clarity, tone, and warmth of your recordings. The preamp boasts variable impedance matching for microphones, ensuring optimal performance from any mic. The parametric EQ allows for subtle adjustments to fine-tune your sound or more drastic changes for creative sculpting.
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