AHB2
Instruction Manual Rev F
Page 9
Quick Start Guide
Overview
Connect all cables before turning the unit on.
Check the settings of the
MODE
and
SENSITIVITY
switches before turning the unit on.
Turn down the audio source before turning the unit on for the first time.
1. Set the MODE Switch
The
MODE
switch is very important, make sure it is set correctly for your application. An incorrect
setting will not cause damage, but it may cause low output levels, a missing channel, or a polarity
inversion.
The
AHB2
power amplifier can be run in two modes:
STEREO
mode - Two output channels
MONO
mode - One output channel in bridged mono
The bridged
MONO
mode will deliver almost 4 times as much power into an 8-Ohm speaker, and
will do so without any increase in distortion. The
MONO
mode is an excellent choice for high-power
applications. In
MONO
mode, two amplifiers will be required for stereo operation.
Set this switch to
STEREO
if the
AHB2
is driving a stereo pair of speakers.
Set this switch to
STEREO
if the
AHB2
is driving two channels of a multi-channel system.
Set this switch to
STEREO
if the
AHB2
is driving a biamped two-way speaker.
Set this switch to
MONO
if the
AHB2
is driving one speaker.
2. Set the SENSITIVITY Switch
The
SENSITIVITY
switch must be set properly in order to maximize the signal to noise ratio of
your audio system. If this switch is set too low, you will not be able to drive the amplifier to its
rated output. If this switch is set too high, the noise produced by your preamplifier will be amplified
more than is necessary.
If you are using an unbalanced input, you must use one of the top two switch positions.
If you are using a balanced input, you will usually need to use one of the bottom two switch
positions.
Set this switch all the way down if you are using professional balanced sources.
Raise the switch to increase the output level.
Lower the switch to decrease the output level.
When set properly, you should be able to drive the amplifier to the onset of clipping when your
volume control is set near maximum.