THX Mode:
If your surround processor/
receiver is THX-certified:
Note: When the THX/Normal
switch is set to “THX,” the
subwoofer’s internal crossover
and output level control are
bypassed.
To continue enjoying THX-
quality bass response in a
very large room, two or more
HTPS-400 subwoofers may be
connected in series. For every
3000 cu. ft. of room volume, it
is recommended that you add
one HTPS-400.