Instruction Manual for HPA4 with 1.0.X Firmware – REV B Page 26
listening level. This control makes it easy to
transition between a normal listening level
and a background level. The DIM function is
also accessible from the optional remote
control.
Inputs may be renamed and unused inputs
may be disabled. Input levels can be trimmed
to provide input-to-input level matching.
Screen brightness is adjustable and timers
can be set to dim or shut off the display. The
setup screen can be locked to prevent access
to advanced features.
12V Trigger
The HPA4 has two trigger ports. These can
be connected to other audio components so
that the entire audio system can turn on and
off in a sequenced fashion. The HPA4 will pull
the trigger I/O to 12 volts DC while the HPA4
is on. If the HPA4 is off and an external
device pulls the trigger I/O to 12 volts, the
HPA4 will turn on.
The trigger ports are bi-directional by default,
but they can be configured as inputs or
outputs.
Auto-On Function
The HPA4 can be programmed to
automatically turn on when AC power is
applied.
Casework
The HPA4 is available with a black or silver
faceplate and is designed to match the
Benchmark AHB2 power amplifier. It
occupies the same footprint as the
Benchmark DAC1, DAC2 and DAC3
converters. The case features a milled
faceplate and milled sides. Top, bottom, and
rear panels are made from thick aluminum
and feature a brushed texture. The HPA4 is
built to last and will be a fine addition to your
listening space.
Equipment Placement
Locate the HPA4 where the side panels are
exposed to air. These panels help dissipate
heat and should not be obstructed.
The IR sensor for the remote control is
located to the right of the power switch on
the front panel. Make sure this is visible from
your listening position.
The HPA4 does not emit strong magnetic
fields and for this reason, it will not create
interference with audio devices that are
placed above or below the HPA4.
Please note that most power amplifiers emit
strong magnetic fields. In most cases, the
HPA4 should not be stacked directly above or
below a power amplifier. Allow at least a few
inches of space above or below a power
amplifier. The magnetic fields produced by
the power amplifier may interfere with the
HPA4. One exception is the Benchmark
AHB2 power amplifier. The HPA4 can be
stacked directly above or below an AHB2
without any risk of magnetic interference
from the power amplifier.
The HPA4 can also be stacked directly above
or below Benchmark DAC2 or DAC3
converters. The older DAC1 series converters
emit stronger magnetic fields and should not
be stacked directly above or below the HPA4.
Auto-Ranging Power Supply
The internal power supply automatically
senses the AC line voltage. There are no
settings or fuses to change for international
operation. Select a grounded IEC power cord
that matches the AC outlets in your country.
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