Power amp mode switch: The CA3000 is a four channel power amplifier, Arranged as channels 1,2,3 and 4.
These are configured as two totally separate stereo amplifiers. Channel 1 and 2 are treated as a pair,
Channel 3 and 4 are treated as a pair. These channels can be used:-
(A) Stereo Mode. All channels run independently
(B) Dual Mono. One signal sent to both amps.
(C) Bridge. Channel 1 and 2 can be bridged together as can 3,4
(Cont)These modes are controlled via the mode selector switch on the rear panel. Channel 1 and 2 are
controlled by (37) and channel 3 and 4 are controlled by (48)
Stereo Mode. Each input is sent to its respective output.
Dual Mono. Channel 1 input is routed to outputs 1 and 2
Channel 3 input is routed to outputs 3 and 4
Channels 2 and 4 inputs are not used.
Bridge. Channel 1 input is routed to bridge connector (60)
Channel 3 input is routed to bridge connector (70)
Only the bridge terminals should be used in bridge mode
The NL4 Speakon (TM) output connectors have four pins, 1+,1-,2+,2-.
In normal operation the 1+ pin carries the hot signal, 1- the cold signal.
Channel 1 output also carries channel 2 output on 2+(hot),2-(cold)
Channel 3 output also carries channel 4 output on 2+(hot),2-(cold)
This is to aid the connection of biamped enclosures and the use of four core loudspeaker cable.
IMPORTANT! Take care not to use 2+,2- if they are not needed as some manufacturers actually join 1+
and 2+ together on their loudspeakers!
Typical wiring for Biamp use would be:
Channel 1 - Lo frequency ( 1+, 1- Channel 1 Speakon output)
Channel 2 - Hi frequency ( 1+, 1- Channel 2 speakon output)
Channel 1-2 Stereo mode
Typical wiring for Triamp use would be:
Channel 1+2 - Lo frequency ( 1+, 1- Bridge Speakon output)
Channel 3 - Mid frequency ( 1+, 1- Channel 3 speakon output)
Channel 4 - Hi frequency ( 1+,1- Channel 4 speakon output)
(Channel 3 and 4 could also be wired biamped as above using one four-pole connector on -
channel 3 output.)
Channel 1/2 Bridge mode
Channel 3/4 Stereo mode.
Ground Link Switch: This switched is used to reduce unwanted interference such as multiple earth loops etc
and does so by isolating the grounds of the input sockets only.
Limiter: (OPTIONAL) Activates the onboard Limiter which prevents the output section being driven into clipping
allowing the amplifier to be run at maximum output without experiencing unwanted distortion.
Jack Socket Channel 1: A jack-input option is provided for Channel 1 here
XLR Input Channel 1: An XLR input option is provided for Channel 1 here. Pin connections for the XLR
connection are Pin 1 0V, Pin 2 Hot and Pin 3 Cold.
Laney
1111
38
39
40
41
37
CA MANUAL
