Soundstream 644s 用户指南

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The REFERENCE644s amplifier has the ability to operate in any one of the 
following modes: 

 with identical left and right stereo channels for 

maximum fidelity.  Best choice for satellite speakers.  Use this mode unless 
Mixed-Mono is necessary. 

 in order to drive stereo and mono simultaneously; works well 

for center channels.  It can be used anytime you need a summed mono 
channel.  Somewhat sacrifices sonic accuracy as additional circuitry is 
introduced to one channel.  In Mixed-Mono, the left channel is inverted, see 
diagram below or on the bottom of the amplifier. 

 for dedicated single channel operation; ideal for driving 

subwoofers.  It is also used when large amounts of power are necessary for 
single speakers.  In bridged mono, only the right channel input is active.