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Drawmer

Drawmer 1961 2U-Dual Vacuum Tube Equaliser

Drawmer 1961 2U-Dual Vacuum Tube Equaliser

Regular price Rs. 265,773.00
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1961

Vacuum Tube Equaliser

1961 front view

vintage tube equaliser

It has long been recognized that vacuum tubes impart a unique 'warmth' and 'musicality' to an audio signal, but many of the 'classic' tube equalizers fall short of the technical performance demanded in today's digital recording age. Designed to complement the widely acclaimed Drawmer 1960 Mic Pre-Amp Vacuum Tube Compressor, the 1961 Vacuum Tube Equalizer combines low noise circuitry with no fewer than twelve active tube stages to provide two channels of exceptional equalization possessing unique 'personality'.

Rather than employ a continuously variable resistor as a means of frequency control, the 1961 utilizes the same rotary 'step' switching system used in vintage designs . This enables the component values for each frequency band to be optimized for uncompromising performance across the entire audio spectrum and also makes setting up more accurate, particularly when treating stereo signals.

A close up of the 1960 front panel showing the channel 1 and 2 compressor stage controls

Control The Warmth

The design of the 1961 allows the user to control the amount of 'warmth' by deciding how hard to drive the tubes giving a sound as 'clean' as the best discrete solid state designs or as 'hot' as the 'hottest' classic tube designs.

The 1961 and 1960 Can be 'interlinked' to provide, in effect, a two channel vacuum tube mixing console, - the perfect mastering or post audio 'sweetening' tool.


Features:

Input level:

A variable input level of -20dB to +20dB ensures compatibility with a wide range of input source material and enables the user to optimize signal level and drive the tubes 'soft' or 'hot' as required. LED bargraph displays give a clear indication of the input signal level.


High Pass Filter:

A variable 12dB/Octave roll-off filter adjustable from - 15Hz to 500Hz section enables the user to remove unwanted low frequencies and sub-sonic noise.


A view of the 1960 looking from the right side of the front panel
A close up view of the 1960 Aux and Mic sections
Equalisation:

Each channel of the 1961 has four main equalizer sections with six carefully chosen overlapping frequencies and a separate tube stage for increased harmonic clarity. Each section also includes variable band width from 0.3 Octave to 3 Octaves and +18dB of Cut and Boost. BASS frequencies (Hz) 20, 32, 50, 80, 125, 200. LO-MID frequencies (Hz) 100, 180, 250, 400, 650, 1K. HI-MID frequencies (kHz) 0.5, 0.8, 1.2, 2.0, 3.2, 5.0. TREBLE frequencies (kHz) 2.5, 4, 6, 10, 15, 25.

Low Pass Filter:

A variable 12dB/Octave roll-off filter adjustable from 2.5kHz to 56kHz enables the user to remove high frequency interference or to band limit excessively high levels of high frequencies.

Output Stage:

Two additional tube stages in the output section of each channel allow the user to achieve 'soft clipping' by adjusting the input level control whilst visually monitoring the effect upon the 'Soft' and 'O/L' (Overload) LED's.



Bypass:

In addition to a master bypass switch, each of the parametric/shelving filters has its own separate bypass switch, making the 1961 very straight forward to set up. It allows instant A-B comparison and also enables the tube output stages to be used to add tube coloration without EQ simply by leaving each channel switched to 'In' and each individual EQ sections switched to 'Out'. The master bypass switch for channel bypasses all the filter sections as well as the output stage vacuum tube circuitry.


Operating Level:

Levels of -10dBu and +4dBu are selectable using a rear panel switch.


Insert Connections:

Insert point 1/4" jack connectors on the rear panel enable direct connection to the Side chain or Insert points of the Drawmer 1960 Mic Pre-Amp/ Vacuum Tube Compressor. The 1961 and 1960, when 'interlinked', produce a powerful package for recording signals direct to tape; gain control, EQ & compression can be applied to mic/line level signals without having to go via a mixing console.


Inputs and Outputs:

The 1961 is provided with balanced inputs and outputs on XLR connections.


A view of the 1960 looking from the right side of the front panel

1961 rear

Features:

  • Dual Channel Equaliser from the legendary 1960's series.
  • Vacuum tube in each EQ filter
  • Mastering style EQ design with selectable frequency for repeatability
  • 4 bands of EQ per channel
  • 6 selectable frequencies, variable bandwidth, variable boost/cut each band
  • Individual variable high and lowpass filters
  • Vacuum tube output
  • +4/-10 operation, selectable each channel
  • Very low noise.
  • 2 rack space
  • Classic Drawmer build quality with rugged steel chassis and aluminium front panel.
  • Designed and Handmade by Drawmer in the United Kingdom.

Specifications:

Description Value
INPUT
INPUT IMPEDANCES XLR 20k Ohms
Mic 47k Ohms
Maximum Input Level +17dB (+21dBu)
OUTPUT
Output Impedance XLR 50 Ohms
INSERT 200 Ohms
FREQUENCY RESPONSE <22Hz to 42KHz -1dB
CROSSTALK @ 10KHz <-80dB
@ 20KHz <-75dB
INPUT CMR 20Hz to 10KHz Better than 40dB
OUTPUT BALANCE 20Hz to 10KHz Better than 40dB
Description Value
NOISE @ UNITY GAIN AV 22Hz - 22KHz -94dB
RMS 22Hz - 22KHz -92dB
% DISTORTION (THD & NOISE) @ 1kHz XLR Input with BYPASS selected <0.1%
XLR Input with NORMAL selected <0.3%
POWER REQUIREMENTS 230Volt or 115V at 50-60hZ 28VA
FUSE RATING @ 230Volt T250mA
@ 115Volt T500mA
Conforming to IEC 127-2
FUSE TYPE 20mm x 5mm, Class 3 Timed-Blo, 250Volt working
CASE Depth 250mm
Width 482mm
Height 88mm
Weight 6.1kg
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