10" Driver: The Polk Audio PSW108 uses a front-firing 10"
composite polymer cone driver (with foam surround) for deep, accurate response
with low distortion.
Klippel Optimized Woofer: By using a state-of-the-art Klippel
Distortion Analyzer, Polk is able to optimize the woofer's motor structure, voice
coil alignment and suspension for the best possible performance even at extreme
Motor Structure: The PSW108 utilizes a powerful motor structure
for a higher BL responses (the measure of the motive force applied to the cone) that
results in louder, deeper and punchier bass.
Compression Circuitry: The woofer's Compression Circuitry limits
distortion at high volume levels.
Amplifier: The subwoofer is powered by a high-current amplifier
producing 50 watts RMS/100 watts dynamic power that supplies clean power for loud
bass and a wide dynamic range necessary to recreate a life-like experience in your
Enclosure: The PSW108 features a bass-reflex enclosure with
non-resonant MDF construction and internal bracing for deep bass impact with
superior detail and accuracy. The Polk Audio PSW108 is available in a black
wood-grain vinyl-wrapped finish.
Front-Firing Port: The powered subwoofer's front firing port
allows the woofer to be extremely efficient and provides more bass impact for your
home theater experience.
Not Video Shielded: The subwoofer is not magnetically shielded,
so it is not recommended to place it next to tube TVs and video monitors. Though
LCD, DLP and Plasma televisions are not affected by magnetism you should allow at
least 18" of space between the subwoofer and any TV.
Placement: You may place the subwoofer anywhere in your room,
but it will perform best when it's on the same side of the room as your system's
front speakers. Also, placing the subwoofer near a wall or in a corner will increase
Power Switch: The subwoofer has a 2-way power switch on the
rear panel. When On/Auto is selected, the subwoofer turns on automatically when
an input signal is received and off 15 minutes after the signal stops. The LED power indicator
glows green when the unit is on and red when the unit is off.
Volume Control: The PSW108 has a rotary volume control to adjust
the volume of the subwoofer relative to the other speakers in the system.
Phase Switch: The subwoofer's phase switch allows you to select
0-degrees (normal) or 180-degrees (reverse). If the bass sounds muddy or unclear,
toggling the phase control can sometimes strengthen the bass attack.
Low-Pass Filter: The PSW108 offers a continuously variable
low-pass filter, adjustable from 80-160 Hz.
Line Inputs: The PSW108 has gold plated left and right RCA
line level inputs. If your receiver or processor has a single subwoofer line
output, you can connect it to either the left or right line input jack.
For receivers having subwoofer or stereo
preamp outputs that do not contain their own low-pass crossover, the PSW108 will
handle the low-pass filtering. If the
receiver's subwoofer output or "LFE" output has a built-in low-pass filter, the
PSW108's low-pass control should be turned fully clockwise (160Hz).
Note: The PSW108 does not have a dedicated LFE input.
Speaker Level Input/Output: The subwoofer has spring clips
for the speaker level inputs and outputs. The subwoofer's low-pass filter sends
bass frequencies (based on the setting of the filter) to the subwoofer. The
speaker level inputs and outputs are shorted together, so the output is not
crossed over. You should set you receiver's front speaker setting to Large.