BSS Audio FCS-930/960 User Manual v3.0
Page 5
4 Unpacking
As part of the BSS system of quality control, we check every product carefully
before packing to ensure that it reaches you in flawless condition.
Before you go any further, please check the unit for any physical damage and
retain the shipping carton and all relevant packing materials for use, should the
unit need returning.
In the event that damage has occurred, please notify your dealer immediately, so
that a written claim to cover the damages can be initiated. Refer to section 11.0;
Warranty Information, for more info on the warranty, and also to record your
dealer details.
5 Audio connections
The FCS-930/960 audio inputs are RFI filtered and electronically balanced, with
the outputs electronically balanced and floating. They are designed to operate at
any signal level up to +20dBu and will drive into loads of 600 ohms or greater.
They will be ‘fuss free’, regardless of your installation’s complexity.
Note that pin 1 of the input XLR is not connected to ground.
5.1 Balanced wiring
Whether your system is wired to a ‘pin 3 hot’ or a ‘pin 2 hot’ convention will not
matter as long as your wiring to both the input and output 3 pin XLR connectors
are the same. As is common with all other BSS equipment of this type, we follow
the convention of ‘screen goes forward with the signal’. Input cable screening
therefore needs to be derived from the signal source end as pin 1 is ground lifted
for the inputs. You should use high quality audio cable with 2 cores + screen for
low noise and reliability, and to sidestep potential problems.
5.2 Unbalanced wiring
If the equipment driving the FCS-930/960 has only unbalanced outputs then you
will need to add a wire jumper such that the screen connection on Pin 1 of the XLR
is shorted to either Pin 2 OR Pin 3, depending on the wiring convention of the
unbalanced equipment.
If the equipment being connected to the FCS-930/960 outputs has only unbalanced
inputs, then we recommend that you still use a balanced (i.e. 2 core shielded)
cable. The interconnecting cable should have it’s screen grounded by pin 1 of the
FCS-930/960 output, the pin 3 output should be connected to the unbalanced
input 0v ground, and the pin 2 output should be connected to the live input. There
should be no connection between the cable screen and 0v/chassis ground
connection of the unbalanced equipment. Strict adherence to this will help to
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