Fischer Amps SHAKER AMP 400 User manual

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Manual
SHAKER AMP 400
[Art. No. 001151]
Dear customer:
Thank you for choosing FISCHER AMPS.
Please read this manual carefully prior to the first use, you will get important information for use
and safety of the unit. These safety and operating instructions should be retained for future
reference.
Should you have further questions, please do not hesitate to contact FISCHER AMPS.
Product Description:
Rackmount Amplifier (19-inch) to operate a low frequency transducer ButtKicker LFE with a power of
500W into 4 ohms. A microphone preamp with add-on 48V phantom power and –20 dB Pad switch is
integrated in the Shaker Amp 400 which allows to connect bass drum microphones directly. The combined
XLR/jack connector is equipped with a parallel out to loop the input signal. The add-on active crossover
(low pass 40 to 200 Hz / 12 dB/oct.) and an add-on high pass with 20 Hz adjust the signal if necessary to
the optimum working frequency of the shaker. The Shaker Amp 400 is perfect for use with the FISCHER
AMPS In Ear Amp or with a mixing console to operate the ButtKicker LFE low frequency transducer (4
ohms version). World-wide application possible 115V/230V AC

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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.

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Actuators and Connections Back Side
(1 )
Mic. / Line-Input (XLR-jack combi plug)
Signal input for the microphone or line input (balanced).
This input also handles unbalanced signals with a mono jack connector.
Unbalanced signals with an XLR connector require that Pin 3 and Pin 1
of the plug are connected to audio ground. Phantom power is only
possible with balanced input signal of the microphone.
(2)
Mic. / Line-Out / Thru-Out (XLR-male)
This input allows to loop the input signal to another unit.
The output and the input have a non-switched connection and function
even when the Shaker Amp is switched off. Here the phantom power is
output as well. This means that when two units are connected (Shaker
Amp and e. g. mixing console), only activate one of the 48V phantom
supplies.
(3)
Jack ¼ ‘’ Input/Output Balanced ¼ ‘’ jack In/Out parallel to the XLR-Input.
(4)
Speakon-Power Amp Out
Speakon output to connect the tactile transducer or loudspeaker. Jack 1
+ and 1 –are assigned at the quadripolar Speakon output.
The amplifier generates 500 watts max. into 4 ohms.
(5)
Binding Post Output parallel to the Speakon Output
(6)
Ground Lift Button Separates the audio ground from the system and cabinet ground. When
there is a ground loop when connecting various appliances, pressing the
Ground Lift button can solve the problem (the cabinet of the Shaker
Amp 400 is still connected with the protective ground of the power
supply).
(7)
Input Voltage Select
115V /230V Switch to adjust the appliance to the country’s supply voltage 230V AC
or 115V AC. Before switchover, always switch off the appliance and
disconnect the mains cable from the operating voltage. Doing so
prevents overload of the internal PSU.
(8)
Fuse holder Fuse holder with the 2.0 A power fuse for use with AC power 230V, for
use with 115V AC change the fuse to a 4 AT.
(9)
AC Power Input Connection
IEC 3 pole jack to plug in the power cable. Pay attention that the mains
voltage is correct.

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Safety Information for the Shaker Amp:
There are air slots at the side of the unit. During operation, the unit produces heat, therefore do not
close these slots (danger of overheating).
There are no parts inside the appliance which need maintenance service.
Before opening the appliance, pull the power plug.
Only operate the appliance at grounded current systems which fulfill VDE requirements. When in
operation, the Shaker Amp needs protective earthing.
Do not expose to humidity. When switched off, clean with a slightly damp cloth.
As loudspeaker connection, provide cable with at least 1.5 sqmm wire cross-section, when the cable
is longer than 6 m 2.5 sqmm wire cross-section.
Do not connect load impedances less than 3 ohms to the amplifier output. Doing so can damage or
overheat the amplifier.

Specifications
Weight:
2.8 kg
Dimensions (W x H x D):
483 x 195 x 44 mm (19’’, 1U high)
Operating Voltage:
115 / 230V AC, 50/60 Hz, switchable
Fuse 2.0AT @ 230V, 4.0AT @ 115V
Output Power:
500W @ 4 ohms
Input Connectors:
Balanced XLR/jack combi connector
and link-out via XLR, In/out jack ¼ ‘’ balanced
Input Gain
Adjustable –8 dB to +60 dB (with -20 dB Pad)
Output Connectors:
Speakon-Out, Binding Post
Crossover (active):
Add-on low pass adjustable from
40 to 200 Hz, 12 dB/oct.
Add-on high pass 20 Hz, 12 dB/oct.
WARRANTY:
The manufacturer grants a warranty of 24 months from the date of purchase by the original owner for defects in
materials or workmanship. When the appliance has been subject to misuse or has been altered, the warranty
expires. When returning the defective unit, enclose the receipt, pack the unit to avoid transit damage, and
return the unit carriage prepaid. The manufacturer does not accept carriage forward consignments.
HANS ULRICH-BREYMANN-STR. 3, D–74706 OSTERBURKEN
Phone: [phone], Fax: [phone]
E-MAIL: [email protected], Internet: www.fischer-amps.de