CA 4D
|4 CHANNEL POWER AMP
CA 4D
|OPERATING INSTRUCTIONS
9 |
P a g e
OPERATION
KS AUDIO recommends using KS AUDIO SYSTEM-AMPS with KS AUDIO SYSTEM-
LOUDSPEAKERS only! If not, it may damage parts of equipment.
F MOD DIGITAL CONTROLLER CARD
Please check details in the F MOD controller card manual.
AUDIO CONNECTORS – LINE IN/OUT
All line/audio input and output connections are a balanced electronic type conforming to the XLR
international standard, nominal 20 KOhms for matching to a typical 50 ohm impedance line output
(grounding is on pin #1). For very long cable run
installations, a transformer-balanced output is
preferable to avoid ground differentials and 60 Hz
hum loops over mixed type cable runs. The
impedance is 2 x 10kOhm and is discreet
(independent for pin 2 and 3). Multiple devices can
share the same input signal by using the male-female
sockets as a daisychained audio link. A total of only 1 dB of signal loss on the input signal is seen
when up to 20 devices are sharing the same input signal. Digital AES/EBU lines should be run with
110 Ohm cable impedance. You can daisy chain as many products you wish, as the XLR male
outputs feature an active line transmitter.
UNBALANCED INPUT CONNECTIONS
Cable should be connected to Pin1 and
Pin3 of XLR socket when audio is input
under unbalanced. However, the best way
is to connect Pin3 to the shielding line,
which will probably bring interference.
KS AUDIO recommends employing
"balanced input connections”.
POWER-OUTPUTS /SPEAKON
There are 4 Neutrik®-Speakon speaker level output connectors. These 4 audio outputs are
configured automatically by the controller card selected for the system. The bi-amp mode is +1 /-1
for the lows/mids and +2 /-2 for the tweeter. In bridge mode for high-power-subwoofer
applications one amp is on +1/+2 while the other amplifiers runs as -1/-2. The selected
