JBL M124UK TC 1140 Manual English Tcelectronic Tc1140

User Manual: JBL TC 1140 Manual English Manuals - Support | TC Electronic

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TC1140/2240 PARAMETRIC EQUALIZER/PREAMP
TC parametric equalizer / preamps are top quality audio devices designed for
maximum audio specifications and reliability. They are used by studios, PA
companies, radio stations, theaters and musicians to modify or correct the frequency
response of the sound system.
Applications of the TC parametric equalizers are:
- stereo master equalizing stereo, group or aux outputs from mixing consoles in
order to obtain the desired frequency compensation for the speakers and room
and/or sound effect purposes.
- preamplifying / equalizing signals from dynamic or condenser microphones
(using the jack input), electric guitars and basses, keyboards and other
Instruments before feeding preamp / power amp, mixing console or tape
recorder in the studio. The filters in the TC parametric eq. series perform deeper,
cleaner and more transparent equlization than the filters in most prof. mixing
consoles today.
- eliminating acoustic feedback in monitor systems and resonance frequencies in
speaker systems and acoustic instruments in general by suppressing selected
frequencies up to 50 dB at a narrow bandwidth.
- eliminating hum and buzz in the same way as suppressing feedback and
resonances.
- line driving signals at long distances and equalization of treble-loss.

1

DESCRIPTION OF FRONT PANEL KEYS AND FUNCTIONS
PREAMPLIFIER AND LEVEL CONTROL SECTION

ON:

Lights faintly when the unit is powered on and stronger when
the equalizer section is switched in.

INPUT GAIN:

Adjusts the sensitivity to signal at the input by +/-20dB
The TC equalizer / preamp has extremely high input impedance
at the jack input and is capable of handling high signal levels at
the XLR input. When using the jack input there is an additional
gain of 15 dB, allowing guitar signals, instrument-pickup signals
and hi-fi equipment level signals to be boosted to professional
levels.

OUTPUT LEVEL:

Determines the volume of the output signal. From +6dB to
minus infinity. Unity gain is obtained (all other settings at 0dB)
at approx. '4'.
The strong output (low impedance) of the eq's easily drives any
power amplifier. Overdriving tube-amps, line driving and
eliminating loss of high frequences on long cable lines are tasks
that the eq's perform successfully.

EQ.MATCH:
(EQ-DRIVE)

Level control of the equalized signal.
Enables the level of the equalized signal to match that of output
level with the eq-section switched off. In this way direct
comparison of equalized/unequalized signals can be made.
The match control can be used to do the opposite as well to get
the effect of specific boostings of the equalized signal.
Note that the EQ-MATCH control affects the input level to the
equalizer section, thus enabling a possibility to avoid overload
of the equalizer section with multiple boosts at similar
frequencies.

PPM INDICATOR:

Indicates the available headroom before clipping. This monitors
input and output levels - whichever is higher.
Note that an appropriate signal level is when occasional peaks
of the input signal makes the 0 dB LED light up.

EQ.BYPASS:

Equalizer bypass.
Electronic in/out switching of the equalizer section.
At power on the TC equalizer / preamp defaults to have the
equalizer section switched in.

2

EQUALIZER SECTION
The equalizer section consists of 4 parametric bands. - The term parametric means
that all 3 parameters of a band are adjustable:
Center-frequency, Bandwidth (Q) and the Gain-function (boost/neutral/cut).
CENTER:

The CENTER control allows one to pick exactly the
frequencyband on which a correction is desired. Note the high
'overlapping' of the center•frequencies meaning that all bands
can pick centers in the very useful range 200 to 2000 Hz
BAND I : 20- 2000
BAND II : 50- 5000
BAND III: 100- 10000
BAND IV : 200- 20000
The frequency marking is in kilo (1000)-Hertz:
.02 KHz = 20 Hz
.1 Khz = 100 Hz
.5 KHz = 500 Hz etc.

BANDWITH:

The continuously variable bandwidth adjustment controls how
broad (clockwise) or narrow (counter•clockwise) a band will be
affected by the Gain-Function. Scaling is in the musical term
'octaves' - rather than just narrow or broad.
The bandwidth control is the missing control on a sweepequalizer as known from most mixing consoles. - These
'sweepers' have fixed bandwidths or they sometimes vary as
you adjust the center of the band - These limitations are
normally accepted due to price and limited space on such
mixing panels.
On the TC eq's the bandwidth range is very flexible - you can
pick exactly the group of frequencies to be modified - neither
modifying too much nor too little. The setting of 0.1 octaves
corresponds to the bandwidth of a single band on a 100 band
graphic equalizer. Bands up to 2 octaves can be covered.

FUNCTION:

Boost, neutral ,cut level control.
Determines the level of the band selected by the CENTER and
BANDWIDTH controls. Boosts up to 20dB and typical cuts to 50dB are performed by each of the 4 bands - Take care in the
200-2000 Hz range where the overlapping of the centers allows
you to actually boost 80dB (10000 times) at a particular center.

3

OVERLOAD:

The band-overload indication is helpful in determining which of
the function level controls has been set too high with this input
level at the equalizer-section. Either reduce that particular
FUNCTION-level or EQ-MATCH or reduce the INPUT-GAIN
control - preferably in this order.

4

DESCRIPTION OF REAR PANEL
INPUTS AND OUTPUTS
INPUT, XLR:

Balanced (pin 2: +, pin 3: -)
Input impedance
20 Kohm bal or unbal.
Nominal gain
0 or -6 dB
Total available gain 20 dB.
CMRR 50 to 100 Hz 60 dB min., 80 dB typ.
1000 Hz
40 dB min., 60 dB typ.

OUTPUT, XLR:

Balanced, ground refering (pin 2: +, pin 3: -)
Output impedance 50 Ohm
Max output level
RL = 10 Kohm
+27 dBm (50Vpp)
RL = 10 Kohm
+21 dBm (25Vpp)

INPUT, JACK:

Unbalanced
impedance
Nominal gain
Max input level
Rec.nom. input level

OUTPUT, JACK:

REMOTE
CONTROL:

Unbalanced
Output impedance
Max output level
(RL = 10 Kohm)

1Mohm // 68pF
15 dB
+6 dBm.
-45 to -5 dBm

50 Ohm
+21 dBm (25Vpp)

Remote control in/out switching of the eq is possible using the
EXT.BYPASS jack-socket. Either a momentary or alternating
type of switch can be used, provided an internal selector is set
accordingly. The default factory setting is for a momentary
switch. A remote indication of the eq on status can be obtained
by connecting a LED between ring and gnd, using a stereo jack
plug.
With a stereo eq. use only the upper EXT.BYPASS jack socket
if you want both eq's to switch in/out simultanuously.

5

TECHNICAL SPECIFICATIONS
FREQUENCY
RESPONSE:

10 Hz to 100 KHz, +0, -1 dB

DYNAMIC RANGE: 116 dB (120 dB Bypass)
(All settings flat, except output level control at 4-5.)
DISTORTION:

0.015% (THD) @ 1KHz, 0dBm

SIGNAL TO
NOISE RATIO:

100 dB (104 dB Bypass) @ 16dB headroom.

CHANNEL
SEPERATION:

100 dB (TC 2240) at 1 KHz.

DIMENSIONS:

TC 1140: 482 x 44 x 185 mm. (19 x 1.75 x 7.3 inches).
TC 2240: 482 x 89 x 185 mm. (19 x 3.5 x 7.3 inches).

WEIGHT:

TC 1140: 2.7 kgs. (5 lbs)
TC 2240: 3.5 kgs. (7.7 lbs)

6



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