User Guide

CA Series Installation & User Guide v1.2
13
Clearly better sound
Connections and AdjustmentsConnections and Adjustments
Inputs
Each amplier channel has an electronically-balanced input on
a 3-pin, 3.5 mm-pitch screw terminal connector
1
. Twin-core
screened cable should be used when driving the amplier inputs
from a device with a balanced output. Single-core screened
cable can be used when connecting to an unbalanced source.
1
3
2
INPUT: BALANCED
CONNECTION
scn
scn
cold (-)
hot (+)
1
3
2
INPUT: UNBALANCED
CONNECTION
hot (+)
Input Routing
In common with other Cloud power ampliers, each amplier
channel can either be fed with a signal from its own input
(the factory default setting), or with the signal feeding
another channel. This allows the same input signal to feed
several channels without the need for input connectors to be
wired in parallel. CA Series ampliers with fewer channels are
obviously restricted in the range of routing options available
in comparison with models with more channels.
The rear panel INPUT ROUTING DIP switches
2
are used to
select input source for each channel, except Channel 1. Models
CA2500, CA4250, CA6160 and CA8125 have a dedicated
DIP switch bank for input routing: Model CA2250 uses SW4
of the single 8-pole DIP switch. The factory default setting
is with all input routing switches UP, which connects the
input to each amplier channel to the same-numbered input
connector, as indicated on the upper row of numbers. Setting
a switch DOWN parallels the input of that amplier channel
with the input of the amplier channel indicated below the
switch.
Notes:
• Pole 1 of the DIP switch on Models CA2500/4250/
1610/8125 is not concerned with input routing.
• SW4 of the single 8-pole DIP on Models CA2250 selects
the input source for Channel 2 only
OFF 82 3 4 5 6 7
CH INPUT SOURCE
INPUT
ROUTING
1 21 1 1 22
CA8125
2 3 4 5 6
1 21 1 2
CA6160
2 3 4
1 21
CA4250
Amplifier channel is
fed from same-
numbered input
Amplifier channel is fed
with signal selected to
channel indicated below
ON
AUTO POWER DOWN
OFF
CH INPUT SOURCE
INPUT
ROUTING
ON
AUTO POWER DOWN
OFF
CH INPUT SOURCE
INPUT
ROUTING
ON
AUTO POWER DOWN
CH2 INPUT ROUTING
APD ON/OFF
CH2 65Hz HPF
CH1 65Hz HPF
CH1 4Ω /70V or 8Ω /100V
CH2 4Ω /70V or 8Ω /100V
CH1 Hi-Z/Lo-Z
CH2 Hi-Z/Lo-Z
OFF
OFF
OFF
CH2
4Ω /
70V
Hi-Z
ON
ON
ON
CH1
8Ω / 100V
Lo-Z
CA2250
CH INPUT SOURCE
AUTO POWER DOWN
INPUT
ROUTING
OFF 2
1
ON
CA2500