AHB2
Instruction Manual Rev F
Page 12
Bidirectional 12 Volt Trigger
Benchmark has reinvented the 12 volt trigger by adding bidirectional signaling. The trigger
connection on the
AHB2
can be used as an input, an output, or both. It is compatible with any
common 12 volt trigger input or output. The
12V TRIGGER
can be used to turn the
AHB2
power
amplifier on or off automatically in sequence with other audio system components. The
AHB2
can
also turn other connected components on and off.
Linking Multiple Audio Components
Two or more
AHB2
power amplifiers can be linked together with
12V TRIGGER CABLES
, so that
all units power up and down together. This group of amplifiers can be linked to a group of
Benchmark
DAC2
D/A converters. In such a system, any power button can be used to turn the
system on or off.
Trigger Wiring
The
AHB2
has two bi-directional
12V TRIGGER I/O
jacks. These jacks are 1/8" (3.5 mm) TRS
connectors. The tip is wired to the
12V TRIGGER I/O
bus. The sleeve is wired to chassis ground.
There is no connection to the ring.
Trigger Cables
The
AHB2
includes one 3-foot (1 m)
12V TRIGGER CABLE
. This cable has a 1/8" (3.5 mm) TRS
connector at each end.
Automatic Power-Down Feature
45 Minute Timer
The
AHB2
has an audio signal presence detector on each input channel. If no audio is detected for
a period of 45 minutes, the
AHB2
will automatically shut down to save energy. This feature is
required by law in many countries, and can contribute to significant energy savings.
Activates the 12V TRIGGER
When the
AHB2
executes an automatic power down, it will pull the
12V TRIGGER
low to shut
down any equipment attached to the trigger bus.
No Warm-Up Required
Unlike most power amplifiers, the
AHB2
reaches its full rated performance very quickly. Full rated
performance is reached in less than one minute. For this reason, there is absolutely no reason to
keep the
AHB2
powered on when not in use. The feed-forward error correction circuits in the
AHB2
keep it very stable over a wide range of operating temperatures.