Rear panel, Loudspeaker binding posts (outputs), Power input ( ac in) – Cary Audio Design A 306 User Manual
Page 7: Dc trigger input terminals

Rear Panel
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LOUDSPEAKER BINDING POSTS (OUTPUTS):
* Provide audio output. Two pair of custom-made, high-current Cardas binding posts 
 labeled + (positive) and - (negative) are included.
* These binging posts are designed to facilitate high pressure, high contact area 
 connections without the use of tools such as nut drivers. A simple finger-tightening
 actually yields higher contact pressure than traditional hex binding posts. There is
 no need to exert unusual effort when tightening.
* CAUTION! 
 NEVER connect power amplifier outputs to any component other than a loudspeaker.
 NEVER short-circuit power amplifier outputs.
 NEVER connect power amplifier outputs to another power amplifier's outputs.
 DO NOT OVERTIGHTEN the A 306 binding posts. Tight, high-contact pressure
 connections can be achieved with figer-tightening.
 DO NOT FORCE the A 306 binding post "wings" up and over a bent or oversized
 connector. Doing so may result in binding post damage. If the connector obstructs
 "wing"-turning, slide it into place when the binding post opening provides a snug fit.
 Then, use quarter-turns to tighten the connection as needed.
 
 
POWER INPUT ( AC IN):
* Connect to an AC power supply using the included power supply cord.
DC TRIGGER INPUT TERMINALS:
* Provide DC trigger control. One 3.5mm mini-jack is available to receive 12V DC 
 signals from a connected component. Toggling the connected component between
 on and standby will toggle the A 306 into and out of standby.
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RIGHT SPEAKER OUTPUTS
LEFT SPEAKER OUTPUTS
RIGHT SPEAKER OUTPUTS
LEFT SPEAKER OUTPUTS
MAIN INPUTS
RIGHT CHANNEL
LEFT CHANNEL
AC MAINS
TRIGGER INPUT
CARY AUDIO DESIGN, INC.,
 A 306 POWER AMPLIFIER
 MADE IN APEX, NC, USA.
XLR
XLR
RCA
RCA
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Tip + / Ring -
 +3.3 / 24 VAC
