User Manual

en
Control elements and connections
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you can turn the relevant tone control toward 0 (maximum
cut).
By cutting certain frequencies instead of
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boosting others, you protect your equipment
from extreme volume peaks (“clipping”) and
get valuable headroom.
(12) The FREQUENCY selector adjusts the frequency of the
MID rotary knob (see (11)). There are fi ve settings available:
220 Hz, 450 Hz, 800 Hz, 1.6 kHz and 3 kHz.
(13) The BRIGHT switch boosts the frequency range centered
at 2 kHz by 6 dB.
(14) To activate the graphic EQ and level features, push this
button or the footswitch (37).
(15) EQ sliders: If you activated the graphic EQ (14), you can
use each slider to emphasize and de-emphasize a specifi c
frequency band. The center frequency of each frequency
band is displayed directly below the corresponding slider.
To boost a frequency band, move the corresponding slider
up. To cut a frequency band, move the corresponding slider
down.
(16) LEVEL slider: To compensate for possible level changes of
the equalized signal, slide this control between +12 and -12.
At “0” level, the BTX neither boosts nor cuts the equalized
signal.
MASTER features
(17) MASTER control: To adjust the speaker volume and the
level of the PREAMP OUTPUT, turn this control toward 0 (no
volume/level) or, alternatively, toward 10 (maximum volume/
level).
(18) The FX ON switch activates the EFFECTS LOOP (see (28),
(29)). The FOOTSWITCH connector may be found on the
rear panel (37).
(19) LIMITER button: The limiter reduces only the signal peaks
that can overdrive the POWER AMP and distort the audio
signal. The limiter prevents the BTX36000 from clipping
these signal peaks. To activate or deactivate the limiter, push
this button.
Typically, the limiter does not affect the perceived signal
dynamics. For this reason we recommend to keep it switched
on at all times.
CROSSOVER section
(20) The FREQUENCY rotary knob adjusts the crossover fre-
quency required in the BI-AMP mode. The frequency range
below the crossover frequency is routed to amplifi er A
(LOW), whereas the range above the crossover frequency
is routed to amplifi er B (HIGH).
(21) The MONO BRIDGE switch activates the mono-bridged
mode. The switch glows when the mode is active.
(22) The BI-AMP switch activates the BI-AMP mode. The switch
glows when the mode is active.
(23) The BALANCE rotary knob adjusts the balance between low
and high frequencies in BI-AMP mode (see (20)).
To understand the different operation modes of the BTX36000,
please read the sections “Modes of operation” and “Bi-amping.”
Rear panel
Rear panel control elements
(24) The unit’s fan is located here. Fan speed adjusts automati-
cally to assure trouble-free operation.
To prevent faulty operation, please make sure
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that the unit is kept at a distance from other
appliances emanating heat.
(25) The SPEAKER OUTPUTS are high-quality professional
speaker connectors. The pin designation of the speaker is
pins 1+ and 1-. For details, refer to the section “Audio con-
nectors”.
In mono-bridged mode, connect one loudspeaker =
to the middle jack MONO BRIDGE.
In any other mode, connect one loudspeaker to =
OUTPUT A/LOW and another to OUTPUT B/HIGH.
Before you connect speakers to the BTX36000,
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turn it off.
(26) The mains connection is established using a cable with an
IEC mains connector. This cable is delivered with the BTX.
(27) BREAKER (automated fuse). After eliminating the cause
of faulty operation, simply push the BREAKER back in and
power up the unit again. The BREAKER acts in place of
common disposable fuses.
Caution
Before engaging the BREAKER switch, you
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should power down the unit (POWER switch
set to OFF)!
EFFECTS LOOP jacks
(28) RETURN CHANNEL A/B: The unbalanced ¼" jacks are used
to route a mono or stereo signal from an external effects unit
back to the BTX.
When using a stereo effects processor, route the =
right part of the effect signal to RETURN CHANNEL
A and the left part of the effect signal to RETURN
CHANNEL B.