Bose AmPlus 100 Operations Instructions download pdf (Page 8)

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AmPlus 100 amplifier controls

Figure 3

AmPlus 100 amplifier

controls

All About The AmPlus

100 Amplifier

BASS

LEVEL

Ch2Ch1

OFF

+10

OFF

+10

ZONE 1 ZONE 2

REMOTE

VOLUME

ZONE 1 ZONE 2

LINE OUTPUT

+-+-

INPUT

MODE

2Ch

dual

mono mono

+-+-+-

70/100V

ZONE1

4-16 Ω

ZONE 2

4-16 Ω

XFR

MODE

POWER AMPLIFIER

70/100V 2 Ch

BRIDGED

LEVEL

Zone 2Ch2Ch1

0 0 0-40 dB -40 dB -40 dB

-10-10 -10

-6 -6 -6

Ch1 Ch2

INPUTS A

+- +-

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

module from the 4Ω Channel 2 amplifier outputs. See

“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 (4Ω) 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 (4Ω) 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.

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Bose AmPlus 100 Operations Instructions Page 8

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