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12 Volt Jacks
12V In Jack
The A 31 12V input uses a 3.5mm jack (mono). To use the 12V trigger, insert the trigger wire
plug into this jack and the plug at the wire’s other end into the AV receiver or preamp’s 12V
output jack. We have included a 3.5mm to 3.5mm trigger wire as well as a 3.5mm to 2.5mm
trigger wire.
Note: If the controller’s trigger output is a + and – terminal, you can cut the 3.5mm plug
off one end of the included trigger wire and attach the bare wires to these terminals. The
lead with the white stripe on it corresponds to the plug’s tip and the unmarked lead
corresponds to the sleeve of the plug. The trigger plug tip is + (positive) and its sleeve –
(negative).
Note: The A 31 trigger circuit draws a negligible 15 mA. The total load on your preamp’s
trigger output(s) is the sum of the trigger current drawn by each of the components
you’ve looped together. Check the maximum capacity of your AV receiver, processor or
home controller’s trigger outputs so you do not overload them by connecting too many
power amplifiers. Typical ratings are 50mA to 100mA.
12V Loop Out Jack
The Trigger Out jack lets you loop or “daisy-chain” the incoming trigger voltage to an
additional A 31 or another component(s).
3.5mm vs. 2.5mm jacks
Some other Parasound power amplifiers and preamplifiers might use 2.5mm “sub-mini”
trigger jacks. To use the A 31 with products that use a 2.5mm jack we have included a
trigger wire with a 3.5mm plug at one end and a 2.5mm plug at the other end.
AC Power Cord
The IEC standard AC cord supplied with your A 31 is an audiophile-grade component.
Please connect it directly to an AC wall outlet or power conditioner that is always “live.” If
possible, plug your A 31 into the same AC outlet that your preamplifier is plugged into. If
different AC outlets are used for the A 31 and the preamplifier the ground potential may be
higher or lower between the outlets, resulting in audible hum.