Proceed PDSD - Manual (Page 58)

58
dipolar surround placement
sub L sur
R sur
R
C
L
If more traditional speakers are used, you may want to consider placing them
such that their output is scattered across the rear of the room. (See diagram.)
This placement provides a diffuse soundfield somewhat similar to the dipolar
speakers. Often, the best results will be obtained by placing them relatively high
and slightly behind the listener, cross-firing across the rear wall so as to create a
large number of reflections with relatively little direct sound arriving at the listen-
ing position.
conventional surround
placement
sub
L sur
R sur R
C
L
working in unusually
large rooms
Large rooms (in the 4000-6000 cubic feet range) have so much air to move that
they may benefit from having additional subwoofers for greater bass impact. The
PAV/DSD’s subwoofer output can easily drive several power amplifiers—simply
split its output with Y-connectors. Alternatively, you can purchase the auxiliary
output module (turning your Digital Surround Decoder into an eight channel
processor) and set one of the channels to proved for an extra, independently ad-
justable subwoofer.
Another technique for large rooms involves the construction of risers for the seat-
ing area in a dedicated home theater. Risers tend to enhance the visceral effect of
deep bass by providing a resonant platform for the couches and chairs, thereby
transmitting structural as well as airborne vibrations to the audience. This ap-
proach can be used alone or in conjunction with extra subwoofers. If both tech-
niques are used, consider building one or more subwoofers into the riser, which
both conceals the subwoofer’s bulk and maximizes the vibrations being transmit-
ted to the listener’s chair. (Action movies will never be the same.…)