9
Connections
Input Connectors
The Reference Phono 3 provides two sets of
input connectors, labeled Input 1 and Input
2. Both input connectors are single-ended.
Output Connectors
Two pairs of balanced and single-ended
main outputs are provided. The outputs
are connected in parallel. If using both
outputs simultaneously, the combined
input impedance of the preamplifier being
driven by the Reference Phono 3 must
be greater than or equal to 20k Ohms.
A.C. Power Connection
It is important that the Reference Phono 3
be connected via its supplied 20 amp IEC
12-gauge power cord to a secure, dedicated
A.C. power receptacle. Never connect to
convenience power receptacles on other
equipment. Only use the power switch
on the front of the Reference Phono 3
for On/Off control of the preamplifier, or
the IR input, RS232 or remote control.
RS-232 Input
The RS-232 input allows connection of
a control or automation system.
IR Input
The IR input allows a remote IR sensor or
repeater system to be connected to the
Reference Phono 3 for control purposes,
utilizing a standard mono 1/8” connector.
Important
Use the best available speaker wires
and interconnects. Audio Research
cannot emphasize this enough. As
better components and systems are
developed, it becomes increasingly
important to avoid the limitations of
inferior system interconnections.
It is important sonically that your entire
system be connected so that the audio
signal arriving at the speakers has correct,
or ‘absolute’ polarity (i.e., non-inverted).
Summary of Contents for Reference Phono 3
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