Hafler JF2000 Owner's Manual page 8

Bridging applies much more power to the speaker load than
either amplifier channel would alone. For an 8-Ohm speaker,
the JF2000 is rated for a minimum output of 200 Watts for a
single channel. For both channels bridged into the same
speaker, the minimum output would be 600 Watts.
When the application calls for higher power levels than you
can get from the JF2000
bridged mono mode.
USE CAUTION! Most speakers cannot handle the power of
the JF2000 in bridged mono mode.
Typical applications include: driving large (mono) subwoofers,
large power hungry speaker systems, or bi-amp applications
where large amounts of power are required.
In order to use both channels of input to sum the signal to
drive a mono speaker, set the input switch to stereo (IN) and
the output switch to mono (OUT). The amplifier's left channel
red binding post connect to the positive (+) speaker terminal
and the right channel red binding post connects to the
negative (-) speaker terminal. (Refer to Figure 4)
in normal stereo, you can use the
Figure 4
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