User guide
© 2009 Wohler Technologies, Inc. All rights reserved.
7
 AMP1A Series User Guide
Audio Amplifier and Speaker Configuration
Audio Amplifier and Speaker 
Configuration
Audio Amplifiers
All AMP1 Series models contain high performance speakers driven by 
three power amplifiers; two amplifier/driver combinations handle 
midrange and high frequency information in the left and right (stereo) 
speaker channels, while the third amplifier channel sums the left and 
right channel information below the 500 Hz crossover point in the 
woofer (bass) speaker(s). Note that the woofer channel is not a 
dedicated LFE or center channel.
Speaker Configuration
The 1U rack size AMP1 Series products are configured with two 
speakers (left and right) to reproduce mid- and high-range audio 
frequencies (in stereo), but feature two woofer speakers to reproduce 
the summed (combined) low-range audio frequencies from the left and 
right speaker input channels. It should be noted that both woofer 
speakers, which are wired in series, are driven from one woofer 
speaker channel, and are not stereo. See the simplified diagram below 
for a block diagram of the AMP1 Series audio amplifier/speaker 
configuration.










