Parallel Mode; Bi-Amping; The Compressor; About Speaker Impedance - Bugera BTX36000 User Manual

always a separate input signal as well as a separate output signal.
2-channel mode is active when the button (21) is not lit (off).
Examples:
2-channel (stereo) playback
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Two independent mono signals, such as instrument
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signal and monitor mix
Bi-amp operation, whereby bass frequencies are
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run on channel A, and high frequencies on channel
B (see 4.2 "Bi-amping").
Stereo Effects Processor
ULTRABASS BA410
(Full-Range Loudspeaker)
2-channel mode (stereo)

Parallel mode

Parallel mode is identical to 2-channel mode, except that the inputs
of both channels are internally connected in parallel. Channels A
and B transmit the same signal which is useful for live applications
with speakers positioned far apart.

Bi-amping

The BTX's active crossover is able to split up the signal into two
frequency bands. The mono signal's low-frequency range (chan-
nel A) is separated from the high-frequency range (channel B).
The crossover frequency may be adjusted over the range of
50 Hz – 1 kHz, allowing you to select the frequency that corre-
sponds to the speakers available to you:
OUTPUT A: subwoofer, OUTPUT B: full-range loud-
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speaker (Example: EUROLIVE E1800X and ULTRA-
BASS BB410) > crossover frequency: < 200 Hz
OUTPUT A, B: different full-range loudspeakers
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(Example: ULTRABASS BB115 and ULTRABASS BB210)
> crossover frequency: > 300 Hz
BTX36000
(Stereo Mode)

The compressor

A compressor is used to limit the dynamic range of a signal. Signal
peaks are lowered and soft signals are raised in volume, thus
reducing the difference between the highest and the lowest signal
levels. The result is a much more powerful sound.
Some playing techniques, such as slapping, lead to high-level
differences. In this case, a compressor can be used to make
the low-level dead notes clearly audible, which gives the bass
line even more groove. What is more, the sustain of long notes
is extended.
Compressors work best if provided with high input signals. If the
signal level is low, the effect will be activated only with high set-
tings. If so, enabling the compressor can lead to extreme level
differences. If GAIN is high, the compressor comes in quite early.
In this case, you don't need to turn up the COMPRESSION control
that far to achieve an effect. Experiment with it to find the best
setting for your needs!
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About speaker impedance

The total impedance of the speakers that you connect to the
BTX36000 affects the power output. The minimum speaker im-
pedance is 2 Ohms in stereo mode and 4 Ohms in mono-bridged
mode. The BTX36000 supplies the most power into the minimum
speaker impedance.
How to calculate the speaker impedance
When using more than one speaker and each connecting to an-
other BTX speaker jack, the speakers are connected in parallel.
To calculate the resulting total impedance of the speakers, use
the following formula—
Applications
Effects Processor
ULTRABASS BA410
Full-Range Loudspeaker
ULTRABASS BA115
Bass Loudspeaker
Bi-amp operation
Turn on the compressor
(7).
Turn the COMPRESSION rotary knob (8) slowly to
the right to increase the level of compression.
Use the ON (ACTIVE) switch to compare the com-
pressed signal with the uncompressed signal.
BTX36000
(Bi-Amp Mode)
7
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