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Connections and Adjustments
Connections and Adjustments
Inputs
Each amplifier channel has an electronically-balanced input on
a 3-pin, 3.5 mm-pitch screw terminal connector
screened cable should be used when driving the amplifier inputs
from a device with a balanced output. Single-core screened
cable can be used when connecting to an unbalanced source.
scn
INPUT: BALANCED
CONNECTION
scn
INPUT: UNBALANCED
CONNECTION
OFF
Amplifier channel is
fed from same-
numbered input
ON
INPUT
ROUTING
CH INPUT SOURCE
OFF
2
3
4
ON
1
1
2
AUTO POWER DOWN
CA4250
. Twin-core
1
1
2
3
cold (-)
hot (+)
3
1
2
hot (+)
INPUT
ROUTING
CH INPUT SOURCE
2
3
4
5
6
7
8
1
1
2
1
2
1
2
AUTO POWER DOWN
CA8125
INPUT
ROUTING
CH INPUT SOURCE
OFF
2
ON
1
AUTO POWER DOWN
CA2500
Input Routing
In common with other Cloud power amplifiers, each amplifier
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 amplifiers 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
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 amplifier channel to the same-numbered input
connector, as indicated on the upper row of numbers. Setting
a switch DOWN parallels the input of that amplifier channel
with the input of the amplifier 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
Amplifier channel is fed
with signal selected to
channel indicated below
ON
CH2 Hi-Z/Lo-Z
CH1 Hi-Z/Lo-Z
CH2 4Ω /70V or 8Ω /100V
CH1 4Ω /70V or 8Ω /100V
CH2 INPUT ROUTING
APD ON/OFF
CH2 65Hz HPF
CH1 65Hz HPF
C l e a r l y b e t t e r s o u n d
are used to
2
INPUT
ROUTING
CH INPUT SOURCE
2
3
4
5
6
1
1
2
1
2
AUTO POWER DOWN
CA6160
CA2250
CA Series Installation & User Guide v1.0
13