Fischer Amps In Ear Amp, Manual

4

Actuators and Connections Back Side 

 
 
 
 
 
 
 
 
 
 
 
(1 / 2) 

Combined XLR- 
Jack Connections 
Channel 1 (left), Channel 2 (right) 
 

Connections of the input signal from the mixing console or other audio 
sources. Assignment of the combined XLR connection:  

XLR 

stereo jack 1/4“ 

Pin 1 = Ground  

sleeve 

Pin 2 =  

tip 

Pin 3 = Signal –  

ring 

 
With asymmetric wiring with XLR cables, PIN 3 should be assigned to 
ground (bridge in connection plug). Nominal input level 0dBu, adjustable 
at front side from –10 dB to +12 dB, input impedance 10kohms.  

(3 / 4) 

Link Outputs 
Channel 1 and 2 

XLR outputs to loop input signals to more Amps.  

Pin assignment: Pin 1 = Ground, Pin 2 = Signal (+), Pin 3 = Signal (-) 

Please note: With asymmetric connection of inputs 1 and 2, the signal 
at the Link Out connectors is unbalanced as well and will not be 
balanced internally.  

(5) 

Switch Shaker-Amp Line Out 

When the switch is pressed, the signal at the Shaker Amp Line Out 
passes a low pass with a cutoff frequency of 80 Hz / 24 dB-octave. This 
feature is very helpful when using a standard PA amplifier without 
integrated frequency crossover for the shaker. The cutoff frequency of 
80 Hz corresponds to the optimum working level of the bass shakers.  
When the switch is not pressed, the signal is output full range. This is 
also the correct switch position when operating the ButtKicker Amplifier 
BKA 1000-4 in combination with the Fischer Amps In Ear Amp, as the 
BKA has an integrated, controllable low pass.  

(6) 

Line-Output To Shaker Amp 

Unbalanced connection (jack 1/4“) for an amplifier to control a bass  
shaker. Nominal working level 0 dB. The added signals of channel 1 

and 2 and switchable of channel 3 and 4 are at this output (after the 
gain control and before the earphone amplifier). No matter of the 
adjusted earphone volume level, the shaker output can be switched 
from full range to low pass with a cutoff frequency of 80Hz/24 dB/oct. 

(7) 

Power In 

2-pole power connector for the power cable. The In Ear Amp has an  
internal encapsulated and isolated switching power supply, therefore 
there is no need to connect the Amp to GND. This also prevents hum 
noise occurs. The switching power supply has an input voltage of 90 to 
250VAC 50-60Hz, so the Amp can be used world-wide.