Chandler Limited Curve Bender with 1/2 dB steps User Manual

The EMI TG12345 Curve Bender is the ultimate TG equalizer issued in celebration of the 75th
birthday of Abbey Road Studios. The Curve Bender was conceived by Chandler Limited designer
Wade Goeke and is based on the vintage EMI TG12345 desk used to record The Beatles and Pink Floyd.
This newest EMI equalizer continues the tradition of EMI EQs started in 1954 with the RS57, the 1969
TG12345 and the 1974 TG12412. Wade turned the nine selections of the vintage version into 51 EQ
points plus a multiply switch that increases the boost/cut to 5db to 15db (as well as sharpening the Q), filters,
and bell/shelf selections on the high and low bands.

NOTE ON FRONT PANEL LABELING - You will notice white and yellow markings on the controls
of the front panel. This is not a mistake :-) Because of the new controls and settings added to the
Curve Bender we have used two colors for control labels. White labels designate a setting exactly
as it would have been on a vintage TG unit. Yellow designates selections chosen by Wade.
This way you may accurately recall a standard TG setting or purposely break all the rules.

Connections - All connections on the Curve Bender are transformer balanced with pin 2 hot.

Power supply - This is designed to be used with Chandler Limited PSU-1 MKII power supply.

The power pin out is as follows:

1) chassis and audio ground

2) 48 volt

3) +28 volt

4) -28 volt

Notes on Grounding - On the back or the power supply are two black banana connectors.
These join the audio ground to earth ground with a solid wire between them. Depending on your
studio you may want this connected or disconnected. Turn up your monitors or headphones a bit
and experiment with which has a lower noise floor in your system. You may also need to join the audio
banana plug to other sections of you studio to obtain lowest noise floor. The audio banana is located
closest to the edge of the power supply case. Use something simple like a guitar cord and touch the tip
to other portions of your studio to find best results. In some cases it may be best to connect a 10 ohm
resistor between banana plugs.

CURVE BENDER

with 1/2 dB steps

Controls and Features

FULL BYPASS - Each channel of the Curve Bender may be fully bypassed by use of these

pushbuttons.

HIGH PASS/LOW PASS - Although the original Curve Bender and TG12345 console did not

frequencies, it is an important fact that new circuitry was not invented to add this feature. Simply

Frequencies are:
High Pass - 20, 30, 40, 50, 60, 80, 100, 160, 200, 320 Hz at a gentle slope.

Low Pass - 30, 20, 18, 14, 10, 8.1, 5, 3, 2 kHz at a gentle slope.

OUTPUT GAIN - Each channel has a gain switch with +/-5db adjustment
in 1/2 db steps for adjusting unity gain through the unit as you apply equalization. The switch is a
hand-wired gold contact switch for audiophile quality.

IN LEFT

IN RIGHT

60

50

40

30

20

OUT

HIGH PASS

80

100

160

200

320

10k

12k

14k

18k

20k

30k

LOW PASS

8.1k

5k

3k

2k

OUT

-4

-3

-2

-1

0

+ 1

+2

-5

+3

+4

+5

Its main use is for direct comparison of processed sound.