Polk Audio 650 用户手册

If the subwoofer output jack is filtered,
we suggest using hook up 

OPTION #1

or 

#2

. If it is unfiltered, connect the 

subwoofer output jack to either of the
line level “IN” jacks (Figure 8). With
Dolby Digital systems, select subwoofer
as “on” or “yes” in the “speaker set up” 
or “bass management” function of your
electronics. Read the owner’s manual 
of your electronics to learn how to
select this setting.

Use the “speaker set-up” or “bass man-
agement” function of your Dolby Digital
processor to select subwoofer as “on” 
or “yes.” Connect the subwoofer output
jack to the “LFE/Subwoofer” input of the
PSW650. Disconnect the other speakers
in the system so that all you can hear 
is the subwoofer. Play music or a movie
with vocal content. If you can hear and
understand the words, your output jack
is not filtered. If all you can hear is
bass, and the vocals are barely or not 
at all audible, your subwoofer input 
jack is filtered. 

If you have a Dolby

®

Digital surround

processor, use the “Large” setting for
the front left and right speakers in the
“speaker set up” or “bass management”
function of your electronics. Select the
subwoofer as “Off” or “None.” This will
direct all bass and LFE (low frequency
effects) channel information to the sub-
woofer via the left and right pre-amp
outputs. Consult the owner’s manual of
your electronics to learn how to select
these settings. 

CONNECTING LFE 
WITH OPTION #1 AND #2

When using either hook-up 

OPTION #1

or

#2

with a Dolby Digital system, you may

also connect the subwoofer output to
the PSW650. In Dolby Digital systems,
select the subwoofer as “On” or “Yes” in
the “speaker set up” or “bass manage-
ment” function of your electronics.
Consult the owner’s manual of your
electronics to learn how to select these
settings. Read “

” on the next

page. If your sub output is filtered, 
connect it to the “LFE/Subwoofer” input
of the PSW650. If the subwoofer output
is unfiltered, connect to either of the
“IN” line input jacks (Figure 7).

OPTION #3

This option uses the subwoofer output
jack as the only source of signal to 
the PSW650. In most cases we do not
recommend using only this subwoofer
output jack to connect the subwoofer.
Why? Because many receivers and pre-
amp/processors, the subwoofer output
jack is filtered; that is, all sounds above 
a certain frequency (usually 80Hz) have
been filtered out. That defeats the sub’s
variable crossover control, one of your
primary tools in adjusting the subwoofer 
to blend perfectly with your main speak-
ers. Some units have unfiltered sub-
woofer outputs, and fewer still allow 
you to switch the filter off. Read your
receiver or preamp/processor’s manual
to find out which is the case with your
equipment. If you still don’t know, try
the experiment described on page 9.