Operation Modes; Stereo Operation; Parallel Operation; Bridged Operation - Bose Entero 440 Guia Del Instalador

12. Operation Modes

12.Operation Modes

12.1 Stereo Operation

12.2 Parallel Operation

12.3 Bridged Operation

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On the rear of the amplifier you'll find two mode-select DIP switches with each two single switches for
the operation modes PARALLEL and BRIDGE (Entero
switches are OFF, the amplifier channels are in the regular STEREO mode.
In the Stereo operation mode, each channel will work independently from each other. Input connector 1
will generate signal on output connector 1 and so on.
If EQ cards are required, see chapter 10.5; each channel needs its own EQ card.
Entero 440/840
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Both inputs of the channel pair must be fed with the same signal by connecting the input cable parallel
to both input connectors.
If EQ cards are required, see chapter 10.5; each channel needs its own EQ card.
Entero 4100/4200/4400
For parallel operation, turn the amplifier off and set the mode select switch of the chosen power
amplifier pair to the PARALLEL position. Both channels are then driven by the signal connected to the
first channel of the pair (channel 1 and 2 by input 1, channel 3 and 4 by input 3).
Only the inputs of channel 1 and 3 are active, channels 2 and 4 are out of circuit.
If EQ cards are required, see chapter 10.5; only channel 1 and 3 need their own EQ card.
Channels can be used in BRIDGE mode. Channel 1 and 2 and channel 3and 4 can be used as an
independent channel pair.
Entero 440/840
Switch the amplifier off. The input signal should be wired to the first channel of the channel pair in the
regular mode and wired to the second channel in inverse mode (the positive pole to the negative pin and
the negative pole to the positive pin).
The amplified signal is available at the positive pins of both channels of the channel pair (positive pin of
channel 1 and positive pin of channel 2). Be careful to make these connections in the proper way.
The load impedance for the bridged operation is between 4 and 16 Ohm.
If EQ cards are required, see chapter 10.5; each channel needs its own EQ card.
Entero 4100/4200/4400
Switch the amplifier off and set the respective DIP switch to BRIDGED. The input signal for a channel pair
should be fed to the first input connector (channel pair 1 and 2: input 1, channel pair 3 and 4: input 3).
The output signal is available between the positive output pins of both channels (output signal of
channel 1 and 2 at 1+ and 2+, output signal of channels 3 and 4 at 3+ and 4+).
The load impedance for the bridged operation is between 4 and 16 Ohm.
If EQ cards are required, see chapter 10.5; each channel needs its own EQ card.
4100, 4200 and 4400 only). In case both single
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