Chandler Limited TG12345 MKIV User manual

For more information, visit www.chandlerlimited.com. © 2021 Chandler Limited, Inc. All Rights Reserved. UM TG12345CB-123121
Abbey Road Studios, EMI, TG, Curve Bender and their associated logos are trademarks of EMI (IP) Limited.
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
BASS PRESENCE 2 PRESENCE 1 TREBLE
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
OUTPUT OUTPUT
IN LEFT IN RIGHT
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
kHz
kHzkHz
Hz
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
12345
BASS PRESENCE 2 PRESENCE 1 TREBLE
kHz
kHzkHz
Hz
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
+3
+4
+5-5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
Chandler Limited®
TG12345 Curve Bender®
User Manual
OFFICIAL
EQUIPMENT
UM TG12345CB-123121

For more information, visit www.chandlerlimited.com. © 2021 Chandler Limited, Inc. All Rights Reserved. UM TG12345CB-123121
Abbey Road Studios, EMI, TG, Curve Bender and their associated logos are trademarks of EMI (IP) Limited.
TG12345 CURVE BENDER
INTRODUCTION ------------------------------------------------- 3
TG12345 Curve Bender ------------------------------------------- 3
History ------------------------------------------------------ 3
SHIPMENT AND STORAGE ----------------------------------------- 4
Packaging ----------------------------------------------------- 4
INSTALLATION -------------------------------------------------- 5
Power ------------------------------------------------------- 5
Audio Input & Output Connections ----------------------------------- 5
OPERATION----------------------------------------------------- 6
Nomenclature ------------------------------------------------- 6
Bypass------------------------------------------------------- 6
Output Gain Control --------------------------------------------- 6
Frequency Bands ------------------------------------------------ 7
Boost/Cut and Multiply-------------------------------------------- 8
Filters ------------------------------------------------------- 8
SERVICE -------------------------------------------------------- 9
United States -------------------------------------------------- 9
International -------------------------------------------------- 9
CE CERTIFICATION ----------------------------------------------- 9

3UM TG12345CB-123121
INTRODUCTION
TG12345 Curve Bender
Thank you for purchasing the Chandler Limited TG12345
Curve Bender EQ, you now own a piece of EMI/Abbey
Road Studios ocial equipment.
Issued in celebration of the 75th anniversary of Abbey Road
Studios, and conceived by Chandler Limited’s Chief Designer
Wade Goeke, the Chandler Limited TG12345 Curve Bender
EQ is based on the vintage EMI TG12345 recording consoles
of the late ’60s and early ‘70s.
Chandler Limited’s TG12345 Curve Bender is a stereo/dual
mono tracking and mastering equalizer, featuring a greatly
expanded control-set over the original equipment. Chandler
Limited’s TG12345 Curve Bender EQ delivers the historic
TG sound with modern conveniences and greater exibility.
Your Chandler Limited TG12345 Curve Bender EQ has been
carefully crafted and built by hand, at Chandler Limited in
Shell Rock IA, U.S.A., using through-hole components for the
ultimate analog experience.
At Chandler Limited we are proud of our American made
products and we hope you like them!
Please feel free to call our shop anytime for help or ques-
tions.
Phone: [phone].
History
Conceived from meetings in 1967 between Abbey Road
and EMI’s Central Research Laboratories teams, the EMI
TG12345 MK.I, a solid-state germanium transistor-based
console was designed as replacement for the earlier valve
based EMI REDD desks.
The equalizer facilities of the revolutionary TG12345 desks,
though limited by modern standards were a large step for-
ward from the REDD console era.
Installed in Abbey Road’s Studio Two in November 1968 and
making its debut on an 8-track recording by the Shadows,
the transistorized desk marked a departure from the earlier
REDD valve consoles.
The EMI TG12345 MK.I desk helped shape the sound of the
Beatles’ nal album, Abbey Road, which was markedly richer
sounding to that of the band’s earlier work.
EMI TG12345 consoles were used on everything from Pink
Floyd’s “The Dark Side of the Moon” and “Wish You Were
Here,” John Lennon’s “Plastic Ono Band,” George Harrison’s
“All Things Must Pass” to epic lm scores including Raiders of
the Lost Ark.
EMI TG12345 consoles encountered many revisions through-
out the ‘70s and became the main recording console used at
the studios until 1983; TG consoles were never commercially
available to the public.
OFFICIAL
EQUIPMENT

4UM TG12345CB-123121
SHIPMENT AND STORAGE
Packaging
This packaging has been designed specically for Chandler Limited equipment. The cardboard carton and rigid foam sur-
rounds provide protection for shipment and storage. Please retain the container and associated materials for future use.
*Note: PSU rigid foam surrounds and sheets are not included for equipment shipped without a power supply unit inside the
equipment container.
CARDBOARD
CARTON
FACEPLATE
CUTOUT
EQUIPMENT
RIGID FOAM
SURROUND
PSU
RIGID FOAM
SURROUND*
SHEET OF
FOAM*
SHEET OF
FOAM*
PSU FRONT

5UM TG12345CB-123121
Power
The TG12345 Curve Bender is powered remotely by the
Chandler Limited PSU-1 power supply, and connected at the,
four pin, DC POWER connector. The PSU-1 is an external
power supply capable of powering two units; the PSU-1 is
purchased separately.
Note: Legacy PSU-1 power supplies featured external
grounding studs. As of mid 2015, grounding studs have been
removed and resistance applied internally.
Legacy PSU-1 Grounding Notes Only: On the rear of the
legacy PSU-1 power supply are two black banana connec-
tors. These join the audio ground to earth ground with a sol-
id 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 oor in your system. You may also need to join the
audio banana plug to other sections of you studio to obtain
lowest noise oor. 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 nd best results. In some cases it may be best to connect
a 10 ohm resistor between banana plugs.
Audio Input & Output Connections
On the rear panel of the TG12345 Curve Bender exists, two
sets of male and female XLR connectors, one input/output
(I/O) pair for each channel side. All audio XLR connectors
are wired pin 2 hot.
PSU-1 POWER SUPPLY
FUSE
FUSE 1.5 AMPS 250 V
DC POWER TO EQUIPMENT AC POWER
PIN 1) 0vPIN 4) -28v
PIN 2) 48vPIN 3) +28v
DC POWER CABLE - 4 PIN XLR
INPUT OUTPUT
LEFT CHANNEL I/O
INPUT
OUTPUT
RIGHT CHANNEL I/O
PIN 1) 0v
PIN 2) 48v
PIN 3) +28v
PIN 4) -28v
DC POWER
000001
Chandler Limited
TG12345 CURVE BENDER
INSTALLATION

6UM TG12345CB-123121
OPERATION
Nomenclature
You will notice white and gold markings on the controls of
the front panel; this is by design.
Because of the new controls and settings added to the
TG12345 Curve Bender, we have used two colors for control
settings. White labels designate a setting exactly as it would
have been on a vintage TG unit, gold designates selections
chosen by Chandler Limited’s Chief Designer, Wade Goeke.
This way you may accurately recall a standard TG setting or
purposely break all the rules.
Bypass
Each channel “IN LEFT” and “IN RIGHT” of the TG12345
Curve Bender may be fully bypassed by use of these push-
buttons. Their main use is for direct comparison of processed
and unprocessed sound.
When depressed, the button’s LED will illuminate bright
blue, signifying the EQ channel is active.
Conversely, when the button is not depressed, button’s LED
will not be illuminated, and the EQ channel is bypassed.
This bypass functionality is ‘true bypass’, i.e. the TG12345
Curve Bender is completely removed from the signal path.
Note: Very early Chandler Limited TG12345 Curve Bender
EQs were not ‘true bypass’.
Output Gain Control
The Left/Right master output channel gain controls feature
stepped hand-wired gold contact switches for audiophile
quality.
The master output channel gain switches are labeled for +/-
5db and adjustable in .5db steps, and are used for adjusting
unity gain through the unit as you apply equalization.
Revision Note: Prior to 2011, standard version TG12345
Curve Benders featured +/-10db output controls, in 1db
steps.
Historical Note: The TG12345 MK.I amplier was used in
the following TG consoles:
MK.I - was the original prototype desk used to record the
Beatles Abbey Road album; only one of these was ever pro-
duced.
MK.II - Three of these were built for deployment in studios
1, 2, 3 at Abbey Road Studios and a fourth for the mobile
recording section. These desks were used to record John
Lennon’s “Instant Karma,” Paul McCartney’s “Maybe I’m
Amazed” and George Harrison’s “All Things Must Pass” sin-
gles and albums respectively.
MK.III - The TG12345 MK.I amplier was also used in the
MK.III desk.
The TG12345 MK.IV desk was the huge wrap-around TG
desk used to record Pink Floyd’s “Dark Side of the Moon,”
and was the rst implementation of the TG MK.IV silicon
based amplier. The MK.IV amp is prevalent in much of the
Chandler Limited, EMI/Abbey Road Studios reissues.
Initially, MK.IV desks were tted with MK.II and MK.III cas-
settes, however, were upgraded to MK.IVs. Once upgraded
and having quadraphonic capabilities, these TG MK.IV desks
were also known as ‘Mark.Q’.
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
BASS PRESENCE 2 PRESENCE 1 TREBLE
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
OUTPUT OUTPUT
IN LEFT IN RIGHT
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
kHz
kHzkHz
Hz
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
12345
BASS PRESENCE 2 PRESENCE 1 TREBLE
kHz
kHzkHz
Hz
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
+3
+4
+5-5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
BASS PRESENCE 2 PRESENCE 1 TREBLE
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
OUTPUT OUTPUT
IN LEFT IN RIGHT
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
kHz
kHzkHz
Hz
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
12345
BASS PRESENCE 2 PRESENCE 1 TREBLE
kHz
kHzkHz
Hz
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
+3
+4
+5-5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5

7UM TG12345CB-123121
Frequency Bands
The TG12345 Curve Bender has four frequency bands per
left and right channels— Bass, Presence 1, Presence 2, and
Treble.
The Treble and Bass bands are peak or shelf switchable.
Note: Historic frequencies are marked in white, and modern
additions in gold.
Treble
The ‘TREBLE’ band on the Curve Bender is Peak or Shelf
switchable, featuring eight frequency selections (3.6, 4.2, 6.5,
8.1, 10, 12, 16kHz, and 20kHz) and an “OUT” or band by-
pass position.
Presence 1
The ‘PRESENCE 1’ or mid band on the Curve Bender is a
Bell type, featuring 8 frequency selections (.8, 1.2, 1.8, 2.8,
3.6, 4.2, 6.5, 8.1kHz) and an “OUT” or band bypass position.
Presence 2
The ‘PRESENCE 2’ or mid band on the Curve Bender is a Bell
type, featuring 8 frequency selections (.3, .5, .8, 1.2, 1.8, 2.8,
3.6kHz) and an “OUT” or band bypass position.
Bass
The ‘BASS’ band on the Curve Bender is Peak or Shelf
switchable, featuring 7 frequency selections (35, 50, 70, 91,
150, 200, 300Hz) and an “OUT” or band bypass position.
Note: Beginning with the TG12345 MK.II desk, the low fre-
quency had a single shelving selection and the presence had
eight peaking selections. In the spirit of making the ultimate
TG EQ, we reproduced the curves of the shelving and peak-
ing bands so that the treble and bass sections can now use
the curves of each. I.e. You may now peak or shelf on the
bottom or top.
Historic frequency selections were as follows— .5, .8, 1.2,
1.8, 2.8, 4.2, 6.5, 10kHz, and low shelf at 50Hz.
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
BASS PRESENCE 2 PRESENCE 1 TREBLE
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
OUTPUT OUTPUT
IN LEFT IN RIGHT
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
kHz
kHzkHz
Hz
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
12345
BASS PRESENCE 2 PRESENCE 1 TREBLE
kHz
kHzkHz
Hz
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
+3
+4
+5-5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
BASS PRESENCE 2 PRESENCE 1 TREBLE
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
OUTPUT OUTPUT
IN LEFT IN RIGHT
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
kHz
kHzkHz
Hz
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
12345
BASS PRESENCE 2 PRESENCE 1 TREBLE
kHz
kHzkHz
Hz
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
+3
+4
+5-5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
BASS PRESENCE 2 PRESENCE 1 TREBLE
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
OUTPUT OUTPUT
IN LEFT IN RIGHT
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
kHz
kHzkHz
Hz
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
12345
BASS PRESENCE 2 PRESENCE 1 TREBLE
kHz
kHzkHz
Hz
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
+3
+4
+5-5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
BASS PRESENCE 2 PRESENCE 1 TREBLE
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8
1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
OUTPUT OUTPUT
IN LEFT IN RIGHT
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
kHz
kHzkHz
Hz
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
12345
BASS PRESENCE 2 PRESENCE 1 TREBLE
kHz
kHzkHz
Hz
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
+3
+4
+5-5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5

8UM TG12345CB-123121
Boost/Cut and Multiply
Each frequency band features a boost/cut control, and an
x1/x1.5 multiply toggle switch.
Boosting or cutting of a selected frequency is achieved by
adjustment of the boost/cut control for the desired result.
The boost/cut control is stepped and labeled +/-5.
For greater exibility, the amount of boost/cut available is
inuenced by the position of the x1/x1.5 multiply toggle
switch.
A setting of x1 provides both a wider Q curve and a boost/
cut of +/-5db in .5db steps.
A setting of x1.5 provides both a sharpening of Q curve and
a boost/cut of up to +/-13.5db.
Setting the x1/x1.5 multiplier switch to the center ‘OUT’ po-
sition, bypasses the band, allowing for quick AB listening of
the band without losing your frequency position.
Note: The multiply toggle switch is not a frequency multi-
plier.
Revision Note: Prior to 2011, there were two versions of
the TG12345 Curve Bender, Standard and Mastering. The
standard TG12345 Curve Bender oered boost/cut in 1db
steps and its controls were labeled for +/-10; mastering ver-
sions provided boost/cut in .5db steps. In late 2011, standard
and mastering versions of the TG12345 Curve Bender EQs
were combined into a single and more exible unit.
Filters
The TG12345 Curve Bender EQ features both a high and
low-pass lter facility per Left and Right channel.
Historical Note: The original Curve Bender and TG12345
console did not have high or low-pass lters; we thought it
was important to add them.
Although we selected our own frequencies, it is an important
fact that new circuitry was not invented to add this feature.
Simply put, appropriate circuits and ampliers were bor-
rowed and slightly modied from existing TG ampliers to
maintain authenticity throughout the unit.
High-Pass
The high-pass lter features
10 frequency options (20, 30,
40, 50, 60, 80, 100, 160, 200,
320Hz,) at a gentle slope, and
an “OUT” position to bypass
the control.
Low-Pass
The low-pass lter features 9
frequency options (30, 20, 18,
14, 10, 8.1, 5, 3, 2kHz,) at a
gentle slope, and an “OUT” po-
sition to bypass the control.
Tip: Use the low-pass lter as
a way to create a great low-
drums sound.
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
BASS PRESENCE 2 PRESENCE 1 TREBLE
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
OUTPUT OUTPUT
IN LEFT IN RIGHT
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
kHz
kHzkHz
Hz
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
12345
BASS PRESENCE 2 PRESENCE 1 TREBLE
kHz
kHzkHz
Hz
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
+3
+4
+5-5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
BASS PRESENCE 2 PRESENCE 1 TREBLE
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
OUTPUT OUTPUT
IN LEFT IN RIGHT
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
kHz
kHzkHz
Hz
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
12345
BASS PRESENCE 2 PRESENCE 1 TREBLE
kHz
kHzkHz
Hz
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
+3
+4
+5-5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
BASS PRESENCE 2 PRESENCE 1 TREBLE
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
OUTPUT OUTPUT
IN LEFT IN RIGHT
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
OUT
X 1
X 1.5
kHz
kHzkHz
Hz
35
50
70
91 150
200
300
OUT
.3
.4
.5
.8 1.2
1.8
2.8
OUT
3.6
.8
1.2
1.8
2.8 3.6
4.2
6.5
OUT
8.1
3.6
4.2
6.5
8.1 10
12
16
OUT
20
12345
BASS PRESENCE 2 PRESENCE 1 TREBLE
kHz
kHzkHz
Hz
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
+3
+4
+5-5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5
-4
-3
-2
-1 0
+1
+2
-5
+3
+4
+5

9UM TG12345CB-123121
SERVICE
United States
Prior to sending in equipment for repair, please contact our
shop at the number below. We will assist you in trouble-
shooting, and if needed, we will issue an RMA# to return the
equipment for service.
Send Repairs To:
Chandler Limited, Inc.
Attention: Repairs
222 S. Cherry St.
PO Box 38 (if sending via the postal service)
Shell Rock IA 50670
Phone: [phone]
Email: [email protected]
International
Repair of Chandler Limited products purchased, outside of
the United States, is provided by local or regional authorized
Chandler Limited distributors. To obtain service or repairs,
please contact your local dealer or regional distributor for
further instruction.
Visit chandlerlimited.com for a list of authorized International
Distributors.
CE CERTIFICATION
Chandler Limited declares under its sole responsibility that all
products manufactured by them are in compliance with Elec-
tromagnetic Compatibility (EMC) Directive 2014/30/EU;
Standards: EN55103-1:2009+A1:2012; EN55103-2:2009;
EN55013:2013 and Low Voltage Directive (LVD) 2014/35/
EU; Standards: EN60065:2002+A1:2006+A11:2008+A2:20
10+A12:2011.

10UM TG12345CB-123121
Product Limited Warranty
During the rst year from the date of the original purchase, this product is warranted to be free from
defects in materials and workmanship under normal use, service and maintenance. This warranty ap-
plies to the original purchaser and is subject to the following terms and conditions:
What Is Covered: The product’s components as originally installed by the manufacturer that are de-
fective in materials or workmanship under normal use, service and maintenance.
What Is Not Covered By This Warranty: This warranty does not extend to or cover:
1. Any defect due to the negligence of others; failure to install, operate or maintain the product properly; unreasonable
use; accidents; alteration; use of unauthorized or non-standardized parts; acts of God; theft; vandalism; electrical
malfunctions (i.e., resulting from power surges, shorted or overloaded circuits, etc.), use of any power source other
than supplied by manufacturer; repair by anyone other than an authorized Chandler Limited representative; or
damage resulting from improper packing or mishandling by a shipper.
2. Normal wear and tear of parts.
3. Shipping, handling, packaging and delivery costs of the product.
Who Is Covered: The original purchaser.
Repair During The First Year: During the rst year, all defective product components that are cov-
ered by this Limited Warranty will be repaired free of charge including parts and labor. The purchaser
will pay shipping costs AND a $35 handling fee per unit.
What You Must Do for Warranty Service (in the United States): If you live in the United States and
your product was purchased through a U.S. Dealer, please contact your dealer OR call 319-885-4200
or e-mail [email protected].
What You Must Do for Warranty Service (outside of the United States): For warranty service if you live outside
of the United States, please contact the dealer where you purchased the product.
Any products returned to Chandler Limited for repair should include: (1) complete description of the
problem; (2) name, address, phone number, fax number, and/or e-mail address; (3) receipt of original
purchase; (4) power supply and all accessories and cables. The purchaser is responsible for the ship-
ping costs to and from Chandler Limited. Chandler Limited is not responsible for damage resulting
from improper packing and/or mishandling by a shipper.
If sent by UPS or Federal Express, ship to: Chandler Limited, 222 South Cherry Street, Shell Rock IA
50670
If sent by Postal Service, ship to: Chandler Limited, PO Box 38, Shell Rock IA 50670
The foregoing expresses Chandler Limited’s obligations and liabilities with respect to the quality of
the product, its components and accessories. All other warranties, express or implied, including the
warranties of merchantability or tness for a particular purpose are disclaimed. Chandler Limited shall
not be liable for the loss or use of the product, its components and accessories, inconvenience, loss
or any other damages, direct or consequences arising out of the use of, or inability to use the product
or its components or damages resulting from or attributable to defects in the products or its compo-
nents. No one other than Chandler Limited has authority to extend or modify the terms of this limited
warranty in any manner whatsoever.

11UM TG12345CB-123121
DISCLAIMER OF WARRANTY
EXCEPT FOR THE FOREGOING WARRANTIES, CHANDLER LIMITED HEREBY DISCLAIMS AND EX-
CLUDES ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO
ANY AND/OR ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND/OR ANY WARRANTY WITH REGARD TO ANY CLAIM OF INFRINGEMENT THAT
MAY BE PROVIDED IN SECTION 2-312(3) OF THE UNIFORM COMMERCIAL CODE AND/OR IN ANY
OTHER COMPARABLE STATE STATUTE.
LIMITATION OF LIABILITY
THE LIABILITY OF CHANDLER LIMITED, IF ANY, AND PURCHASER’S SOLE AND EXCLUSIVE REM-
EDY FOR DAMAGES FOR ANY CLAIM OF ANY KIND WHATSOEVER, REGARDLESS OF THE LE-
GAL THEORY AND WHETHER ARISING IN TORT OR CONTRACT, SHALL NOT BE GREATER THAN
THE ACTUAL PURCHASE PRICE OF THE PRODUCT WITH RESPECT TO WHICH SUCH CLAIM IS
MADE. IN NO EVENT SHALL CHANDLER LIMITED BE LIABLE TO PURCHASER FOR ANY SPECIAL,
INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OF ANY KIND INCLUDING, BUT NOT
LIMITED TO, COMPENSATION, REIMBURSEMENT OR DAMAGES ON ACCOUNT OF THE LOSS OF
PRESENT OR PROSPECTIVE PROFITS OR FOR ANY OTHER REASON WHATSOEVER.