All About The Amplus 100 Amplifier; Amplus 100 Amplifier Controls - Bose AmPlus 100 Installer's Manual

All About The AmPlus
Figure 3
AmPlus 100 amplifier
controls
8
TM
100 Amplifier

AmPlus 100 amplifier controls

INPUTS A INPUT LEVEL
MODE
Ch1 Ch2
Ch1 Ch2
-6 -6
-10 -10
dual
2Ch mono mono
-40 dB 0 -40 dB
+ - + -
Inputs – The amplifier comes with two balanced inputs. They can be left and right
channels from a stereo source or two distinct monophonic (mono) sources for 2-zone
applications. Two mono sources can also be "mixed" for single zone applications.
Input Mode – This switch determines how the Channel 1/Channel 2 inputs are
presented to the power amplifier section of the AmPlus 100 amplifier. There are three
possible modes.
1. In the 2-Channel/Mix position, the inputs remain separate, not summed. Channel
1 and Channel 2 level potentiometers (pots) are active in this mode. Use this
mode for:
a. Stereo (2-channel).
b. Two distinct sources in a two-zone application (2-channel), one source per zone.
c. Two distinct sources in a single bridged mono zone (Mix).
Note: In Mix mode both sources, Channel 1 and Channel 2, are presented to the
amplifier simultaneously. When the internal source mix switch is in the "mix" position
(Figure 5), the Channel 1 attenuation controls the source connected to the Channel 1
input. The Channel 2 attenuation controls the source connected to the Channel 2
input.
2. Dual Mono – The Channel 1 and Channel 2 inputs are summed to mono and
presented to the amplifiers as one mono signal. This mode may also be used
when driving a 70/100V load from the Channel 1 amplifier outputs and a Bose
Model 1B Acoustimass
"Zone 2 level adjust".
3. Mono Mode – Both inputs, Channel 1 and Channel 2, are summed to mono. Only
the Channel 1 level pot is active.
Level – Channel 1 level adjust – In 2-channel (stereo) mode, this pot affects the signal
level at the Channel 1 low impedance (4 ) outputs. In dual mono mode, it controls
the zone 1 level. In mono mode, it controls the level of all outputs.
Channel 2 level adjust – In 2-channel (stereo) mode, this pot controls the signal level
at the Channel 2 low impedance (4 ) outputs. This pot is not active in dual mono or
mono modes.
Zone 2 level adjust – This pot is active only when the input mode is dual mono. In this
mode, this pot controls the signal level at the Channel 2 low impedance outputs. This
pot is a slave to the Channel 1 pot; that is, the Channel 1 pot controls the level of both
zones in a 2-zone system. However, the zone 2 pot can be used to fine-tune the level
of the second listening zone without affecting zone 1. This pot may also be used to
fine-tune the bass level when using the AmPlus 100 amplifier to drive a 70/100V load
connected to the 70/100V output and a Model 1B Acoustimass module connected to
the Channel 2 output.
BASS
REMOTE LINE OUTPUT
LEVEL VOLUME
Zone 2 Ch1 Ch2
-6 ZONE 1 ZONE 2 ZONE 1
-10
0 -40 dB 0 OFF +10 OFF +10
+ -
®
module from the 4 Channel 2 amplifier outputs. See
POWER AMPLIFIER
ZONE 2 70/100V ZONE1 ZONE 2 XFR
4-16 4-16 CT
+ - + - + - + -
70/100V
BRIDGED
®
MODE
2 Ch