Rear Panel Features, AUTO/ON/OFF Switch

CHAPTER 1

Rear Panel Features

1 2

MINIMUM SPEAKER LOAD IMPEDANCE 4 OHMS

1. AUTO/ON/OFF Switch

Your Theater Grand Ampliﬁer is designed with an automatic on/off circuit.

•In the AUTO-ON position, the ampliﬁer will automatically turn on if an audio signal is pres- ent at any of the inputs, or

if it receives a 12 VDC input voltage at the trigger inputs. The ampliﬁer will go to standby after a few seconds if the trig- ger voltage is removed, or after approximately 30 minutes in the absence of an audio signal.

•In the ON position, the ampli- ﬁer is always on, regardless of input signals or 12 VDC trigger.

•In the OFF position, the ampli- ﬁer is in standby, regardless of input signals or 12 VDC trigger.

•See page 7 for details of the front panel LED status.

2. 12 VDC Trigger Input

Although the AUTO-ON signal sensing turn-on is adequate for most installations, the 12 VDC trigger inputs are offered as an optional way to turn on the ampliﬁer.

The Sunﬁre Theater Grand II, III, IV and TGP-5 Processors have a com- patible 12 VDC trigger output (see page 11). This can be used to auto- matically turn on the ampliﬁer when the processor is turned on.

1/8" mono mini jacks are provided for ease of installation, along with a terminal strip to allow more ﬂexibility for custom-wired installations. The terminal strip and both mini jacks are internally connected in parallel, allow- ing 'daisy chaining' to turn on multiple ampliﬁers.

Any 1/8" miniplug mono or stereo interconnect cable will sufﬁce to con- nect the trigger output of the Theater Grand Processor to the ampliﬁer.

Do not exceed 18 VDC on this input. (CAUTION: Do not connect AC line voltage to this input!)

The voltage range for the trigger input is from 5 to 18 VDC. The input impedance is approximately 600 Ω (20 mA @ 12V).

3. RCA Inputs

Your Theater Grand Ampliﬁer has

three sets of inputs for each of the ﬁve channels. Two are unbalanced RCA inputs and one is a balanced XLR type.

The two RCA inputs for each chan- nel are joined together internally, and either one can be connected to the corresponding output of your pream- pliﬁer.

The second RCA input can be used as a daisy-chaining output, sending the preampliﬁer output signal to an- other channel or to another ampliﬁer.

User's Manual