Polk PSW250 Powered Subwoofer

Features

Dynamic Balance: A Dynamic Balance driver is used for deep, smooth response and low distortion.

Amplifier: The 8" front-firing subwoofer is powered by a high-current 50 watt amplifier.

Surround: For a smoother response and improved durability, the woofer uses a rubber surround.

Dual Bass Ports: There are dual, rear-firing bass ports that allow deep bass with high acoustic efficiency and low distortion.

Auto On/Off: The Auto on/off circuit automatically turns the subwoofer on when it senses a program signal and turns off the amplifier after approximately 15 minutes without a signal.

Video Shielded: The subwoofer is magnetically shielded and can be safely placed near your television.

Controls

Rear Panel:

*      Volume: Rotary subwoofer level control

*      Low Pass (Hz): Variable crossover adjustable from 80-160Hz.  

*      Power Switch: Three position switch.  You can select "Auto", which turns the unit on automatically when an input signal is received and off after about 15 minutes without an input signal; "On" which keeps the unit on until it is switched off, and "Off" which turns the unit completely off (instead of placing it in a standby mode).

*      Phase Switch: Allows you to select normal or reverse for best bass.

*      Power LED: The LED glows RED when the unit is off and GREEN when it is on. There is no way to defeat this circuitry.

Inputs and Outputs

Rear Panel:

*      Speaker Level Input/Output: Spring clip connections for front speaker level input and output

*      Line In: Gold plated RCA stereo pre-amp level input. When using the pre-amp level input the unit's low pass filter control sets the low pass crossover point of the subwoofer. If the source unit has only a single subwoofer RCA pre-out, it may be connected to the left or right line input (signals do not need to be fed to both line inputs).

Additional Specs

Frequency Response: The overall frequency response for the subwoofer is 30-180Hz, -3 dB frequency response is 40-160Hz.

Dynamic Power: 125 watts

Calculated Maximum Output (in-room): 105dB at 1 meter