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CA2

1.1 Description

The CA2 preamplifier has been designed to partner ATC active, and with an

appropriate power amplifier, passive loudspeaker systems. It incorporates 4 line-level

stereo inputs, a high sensitivity phono amplifier input, and a tape monitor input on

RCA phono sockets. One stereo record output, a main stereo output and a sub

output on RCA phono sockets, together with a main stereo output on XLR sockets

and a headphone output on a ¼ ” jack socket.

The phono amplifier stage carries an array of slide switches that enable optimal

matching to phono cartridges of various output voltages and load requirements.

Selection of CA2 inputs is achieved via a five position rotary control using gold

plated relays for silent switching. Output volume adjustment is achieved through a

precision motorized potentiometer. The tape monitor function can be selected from

a front panel push button. The tape output is a duplicate of the source selected by

the input selector. Standby is also accessible from a front panel push button. Mains

power is applied from a rear panel mounted switch.

All CA2 functions are duplicated on the ATC SCAR-B remote handset.

Preamplifier

1.2 Inputs

The CA2 accepts unbalanced RCA phono style input plugs. The signal is present on

the centre conductor of an unbalanced input and the signal return is made via the

screened outer. If there is any hum present on the output this must be traced to its

source and not suppressed by the removal of screens and earths. Removal of the

screen on an unbalanced input will result in uncontrollably loud hum. The input

sockets are illustrated in Diagram 1.

Inputs labeled CD, TUNER, AV and AUX1 are at line sensitivity and are electrically

identical. A line level signal from any source equipment may be connected to any of

these inputs.

The right-hand (viewed from the rear) pair of AUX2/PHONO input sockets function

as a high sensitivity phono input. All inputs are via RCA phono connectors.

Diagram 1 - CA2 rear panel and connection sockets

ATC CA2 User Manual

Other manuals for ATC CA2