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230 V~ / 50 Hz
8
5.2 Outputs
The XLR jacks (13), the 6 .3 mm jacks (12) or
the RCA jacks (11) can be used as output for
each channel . The XLR jacks and 6 .3 mm jacks
are balanced; however, they can also be used
independently of the inputs for unbalanced
connections: Do not connect the pin 3 at the
XLR plug or the contact for signal "–" at the
6 .3 mm plug .
5.3 Mains connection
Finally, connect the equalizer to a mains socket
(230 V/ 50 Hz) . Prior to switching on the equal-
izer for the first time, set all controls to mid-
position and disengage the buttons EQ (2) .
6 Equalizer Adjustment
6.1 Switching-on / Groundlift switch
1) Prior to switching on the equalizer for the
first time, set all controls to mid-position
and disengage the buttons EQ (2) .
2) Switch on the equalizer with the POWER
switch (7) . Depending on the presettings,
specific LED indicators will light up .
3) When there is a hum noise caused by a
ground loop (e . g . ground connection from
the housing to the rack and then to another
housing), set the GROUNDLIFT switch (9)
at the equalizer to the position LIFT . This
will separate the signal ground from the
housing ground .
4) Send an input signal to the equalizer . When
one of the LED indicators PEAK (3) lights up,
reduce the input level of the corresponding
channel with the control LEVEL (6) .
6.2 General information
on the frequency ranges
The human hearing range is approx . between
20 Hz and 20 kHz; the upper limit depends to
a large extent on the age . For persons at the
age of 65, for example, the upper limit is gen-
erally below 10 kHz . The highest sensitivity of
the human ear is in the range between approx .
1 to 4 kHz; therefore, changes to the equalizer
settings in this range can be heard more clearly
than changes to high or low frequencies .
The figure on page 3 shows the fun-
damentals and overtones of some musical in-
struments as well as of the human voice . The
fundamental frequency range (white) indicates
the pitch that can be played . The harmonic
frequency range (grey) shows the frequencies
responsible for the sound characteristics of the
instruments .
6.3 Adjustment of the
frequency range level
Caution! Extensive boosting of the frequency
band levels, especially in the bass and tweeter
ranges, may quickly overload and damage
the speakers .
CHB
IN
GROUNDLIFT
LIFT
GND
OUT
OUT
9
10
11
12
Set any additional equalizers in the music
system, e . g . at the amplifier, to zero (mid-
position) first and then do not change them
any more .
1) Press the buttons EQ (2) to activate the
adjustments . As long as all controls are in
mid-position, the sound will not change .
2) The buttons L-CUT (5) should be pressed .
This will activate the subsonic filters and
protect the bass speakers against frequen-
cies which are too low .
3) The buttons RANGE (4) should not be
pressed for the time being . The green LED
"±6" will light up and the control range
of the controls (1) will be set to ±6 dB; this
setting will allow for fine level adjustments .
If the 6 dB control range is not sufficient,
first set the controls (1) to mid-position and
then use the buttons RANGE (4) to set the
control range to ±12 dB . The red LED indi-
cator "±12 dB" will light up .
4) For each channel, the individual controls
for the frequency range levels (1) should be
separately adjusted as follows:
6.3.1 Subwoofer range (25 Hz, 40 Hz)
There are hardly any instruments that produce
such low frequencies . The controls for this
range are used to suppress interference noise
that may occur (e . g . rumble of turntables, sub-
sonic noise); the controls must be accordingly
set to the negative (lower) range .
6.3.2 Bass frequency range
(63 Hz, 100 Hz, 160 Hz, 250 Hz)
The fundamentals of many musical instruments
are in this range . If this range is boosted too
much, there will be a thick, muddy sound . If
it is attenuated too much, there will be a thin,
weak sound .
When the speakers are placed at an unfa-
vourable location (in room corners, too close
to the wall, in shelf systems on the floor), the
bass frequencies will be boosted; in this case,
compensate the bass frequencies by means of
one or more controls .
6.3.3 Midrange
(400 Hz, 630 Hz, 1 kHz, 1.6 kHz, 2.5 kHz)
The human ear is most sensitive to this range:
changes to the equalizer settings in this range
can be heard most clearly . Especially for pop
music and sometimes for radio transmissions,
this range is boosted to obtain a more aggres-
sive effect or to improve voice audibility . For a
more natural reproduction, attenuate the range .
On the other hand, it can be useful to
boost the frequency range to emphasize a solo
instrument, vocals or speech .
6.3.4 Tweeter range (4 kHz, 6.3 kHz, 10 kHz)
Many instrument harmonics are in this fre-
quency range; therefore, it defines if the repro-
duction is transparent and clear or diffuse and
OUT
IN
IN
IN
OUT
13
14
15
10
11
CHA
OUT
IN
OUT
IN
12
13
14
15
dull . Soft materials such as curtains, upholstery
and thick carpets attenuate these frequencies
substantially . To compensate this loss, the fre-
quencies can be boosted .
6.3.5 Supertweeter range (16 kHz)
Many, especially older people are not able to
hear this range any more . However, since these
frequencies are also attenuated by room furni-
ture and decorations, they can be boosted to
make them sound more brilliant .
On the other hand, it can be useful to
attenuate this frequency range to filter interfer-
ence noise, e .g . humming with poor cassette
recordings or poor reception quality of radio
transmissions .
6.4 Input levels
When all frequency range levels have been set
to their optimum values, adjust the controls
LEVEL (6) in such a way that the volume will
not change when the buttons EQ (2) are dis-
engaged to by-pass the equalizer . However,
attenuate the input level when it is too high
and the LED indicators PEAK (3) light up .
7 Specifications
Frequency range: . . . . .10 – 20 000 Hz
Control range: . . . . . . .switchable to
±6 / ±12 dB
Control frequencies: . . .2 ×
25 / 40 / 63 / 100 / 160 /
250 / 400 / 630 Hz /
1 / 1 .6 / 2 .5 / 4 / 6 .3 / 10 /
16 kHz
Subsonic filter (Low Cut): 20 Hz / –3 dB
Inputs: . . . . . . . . . . . . .0 .775 V/ 50 kΩ
Outputs: . . . . . . . . . . . .0 .775 V/ 600 Ω
S / N ratio: . . . . . . . . . . .> 66 dB
THD: . . . . . . . . . . . . . . .< 0 .1 %
Power supply: . . . . . . . .230 V/ 50 Hz
Power consumption: . . .10 VA max .
Dimensions w/o feet
(W × H × D): . . . . . . . . .482 × 44 .5 × 165 mm,
1 rack space
Weight: . . . . . . . . . . . .2 .5 kg
Plugs for connection
Input / Output 6,3 mm jack Input XLR Output XLR
1
–
GND
+
GND = ground
– = signal –
+ = signal +
Subject to technical modification .
All rights reserved by MONACOR
GmbH & Co. KG. No part of this instruction manual
may be reproduced in any form or by any means for
any commercial use.
➁
2
2
1
3
3
1 = ground
2 = signal +
3 = signal –
INTERNATIONAL
®
7
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