Shaker-Amp-400-E-2016-12.doc
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Actuators and Connections Front Side
(1)
Power Switch
(with control lamp)
Activate mains voltage. The Shaker Amps does not consume electric
current when switched off.
(2)
Volume Control:
Adjust volume (intensity) of the power amp output.
(3)
Add-On High Cut:
This pushbutton activates the adjustable high cut (low pass). Tactile
transducers are designed to reproduce bass frequencies which requires
filtering of the high frequencies. The optimum crossover frequency is
adjusted by means of the high-cut control.
(4)
Add-On Low Cut:
The add-on low cut (high pass) filters extreme low frequency signals
below 20 Hz. This prevents the transmission of unwanted air noise when
the bass drum is operated directly.
(5)
High-Cut Control:
Adjust upper crossover frequency when the high-cut is activated.
70 to 90 Hz is a practice-oriented value for the bass drum.
(6)
Signal LEDs:
The signal LEDs indicate the input level after the gain input.
The level is adjusted with the gain control so that the yellow 0 dB LED
lights with incoming signals. The red LED should only flash when there
are loud signals. When the level is adjusted too high, the red LED lights
constantly. If so, the integrated limiter reduces the level to avoid
damage at the tactile transducer or overload of the amplifier.
(7)
Pad Switch (- 20 dB):
The Pad switch attenuates the level by -20 dB before the input stage.
When the input signal has a higher level and thus the red LED lights,
press this button to adjust the optimum input gain.
(8)
48V Phantom Power:
Activation of microphone phantom power 48V to operate condenser
microphones at the XLR input. Only switch on phantom power when a
condenser microphone is connected.
(9)
Gain Control:
Adjust gain of the microphone input. When the Pad switch is pushed the
adjusted gain is reduced by -20 dB.
(10)
Protect LED:
Detects problems with the power amplifier stage in case of a failure or a
shortcut from the connection to the shaker. Please check whether there
is a short circuit in the loudspeaker- or shaker connection.
