Sunfire TGA7401 - Manual (Page 8)

User's Manual
8
Rear Panel Features
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 volt-
age at the trigger inputs. The
amplifier will automatically turn
off after a few seconds if the
trigger voltage is removed, or
after approximately 30 minutes
in the absence of an audio
signal.
• In the power on position, the
amplifier is always on, regard-
less of input signals or 12 VDC
trigger.
• In the power off position, the
amplifier is always off, regard-
less 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
TGP-5,and TGP-401 Processors have
a compatible 12 VDC trigger output
(see page 11). This can be used to
automatically 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.
The supplied 1/8" mini-plug mono
cable can be used to connect 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
seven 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.
CHAPTER 1
+ -
RIGHT
TWEETER
(CURRENT
SOURCE)
+ -
RIGHT
WOOFER
+ -
LEFT
WOOFER
+ -
LEFT
TWEETER
(CURRENT
SOURCE)
R
L
UNBALANCED
PREAMP OUTPUTS
LOUDSPEAKERS
5
8
6
9
1 2 3 4
7
6 6 5
6 6 6 6 7 10 7 11