Simaudio 870A Amplifier - Manual (Page 12)

870A Reference Dual-Mono Power Amplifier
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12
Remote Operation
Figure 4: Remote Operation with 12V Trigger
In figure 4 we have a 740P Preamplifier and 870A
amplifier connected together via their respective 12V
triggers; The 12V trigger output on the 740P is
connected to the 12V trigger input on the 870A
(using a 1/8” mini-jack cable). When you turn on the
740P via remote control (or its Standby button), the
870A will turn on automatically. The same rule
applies when you put the 740P into Standby mode.