FFA FFA-10000 - Audio signal input connections

Each amplifier channel has an input (female XLR) and parallel link (male XLR). The inputs are 20k
Ohm electronically balanced. The ‘link’ XLR can be used either to link channel A and B together
to provide a ‘mono’ signal (for example mono bass signals) or to carry a signal to a further
adjacent amplifier.
Four channel models have input and parallel link on each channel.
We recommend for best audio and noise performance use balanced audio signal cable only, wired as follows:
XLR pin 1 = ground
XLR pin 2 = signal ‘HOT’ or in phase + positive.
XLR pin 3 = signal ‘COLD’ or out of phase – negative.
Unbalanced connections can be used if pins 1 and 3 are connected together via a wire link. Pin 2 is signal HOT + in phase.
IMPORTANT ! At all times ‘pin 1’ must be connected to the shield of the audio signal cable as this will ensure
continued compliance with EMC legislation.
AUDIO SIGNAL LEVEL CONTROL
Each channel has a 41 step potentiometer located on the front panel of the amplifier.
Amplifier gain = 32 dB.
Warning! This appliance must be earthed at all times.
The FFA-4004 and FFA-6004 have a single Neutrik powercon power inlet which requires a maximum of 16A, 230V ac 50/60 Hz.
The FFA-6000, FFA-8000 and FFA-10000 amplifiers have two individual power supplies fitted with a Neutrik powercon mains inlet for
each amplifier channel. Two 16A 230V ac circuits are required per FFA-6000, FFA-8000 and FFA-10000 amplifier. Total 32A 230V ac.
The 2 amplifier channels are totally independent of each other and should a channel fail this will not affect the other channel.
The amplifier must be connected to an AC source with a three wire cable as supplied with the amplifier. The rack the amplifier is
mounted in must also be connected to the same grounding circuit. The amplifier must not be used if the earth connection is
not properly terminated – this is very important for personal safety and system ground control.
The wires in the mains lead are colour coded:
green and yellow = earth
blue = neutral
brown = live
Mains power supply requirement
FFA-4004 – 16A max
FFA-6004 – 16A max
FFA-6000 – 2 x 16A max
FFA-8000 – 2 x 16A max
FFA-10000 – 2 x 16A max
Power operational range
230V ac 50/60 Hz +- 10%
Audio signal input connections
2 channel
4 channel
PIN 1 GND
PIN 2 HOT(+)
PIN 3 COLD(-)
BALANCED
INPUTS
PUSH PUSH
PIN 1 GND
PIN 2 HOT(+)
PIN 3 COLD(-)
B
A
PARALLEL SIGNAL LINK
BALANCED
INPUTS
PIN 1 GND
PIN 2 HOT(+)
PIN 3 COLD(-)
D C B A
PUSH PUSH PUSH PUSH
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