Eminence : Eminence PXB-LP250 :: 250 Hz Low Pass Filter for subwoofers and bass bins
Finished Low-pass Filter NE5532 Subwoofer Process Circuit For Amplifer Module | eBay
500 hz, 12db/oct High Powered Low Pass Filter (Crossover) for Subwoofer Enclosures | Reverb
Low Pass Filter, Low Pass Filter For Sub Woofer, Subwoofer Amp Kit, Sub Pre Amp Kit at Rs 149/piece | Pre Amplifier Training Kit in Durgapur | ID: 22510434648
Subwoofer Active Low Pass Filter with Phase & Bass Boost control M-SUB6 | eBay
Amazon.com: Preamplifier Low-Pass Filter Subwoofer Tone Board Tone Board Volume Control Amplifier Board, DC10-24V : Electronics
Low pass filter for subwoofer. - YouTube
Low Pass Filter Circuit for Subwoofer | Homemade Circuit Projects
Passive low pass filter? - Techtalk Speaker Building, Audio, Video Discussion Forum
How to Make Low Pass Filter for Subwoofer With NE5532 IC | DIY ( ELECTROINDIA ) : 4 Steps - Instructables