Subwoofer Low Pass Filter board at best price

Drango Subwoofer low pass Filter Board

Bass Boost - up 24 dB symmetrical curve Boost .
High signal GAIN - 10dB signal GAIN to Drive Power Amplifiers.
Universal amplifier usability - can be used with any amplifier made of IC or transistors.
Supply Support - 12 0 12 or 15 0 15 volt DC supply required, can be connected directly to Florican Bass treble boards.
Polarity Protection - Dual Diodes at power input to Protect against wrong power input.
Standard Components - All components used are available online or at your local electronics store.
No SMD components - Only through hole components used, making soldering and replacement hassle free.
Cost effective - This subwoofer board can be made in a fraction of cost compared to similar Subwoofer boards available in market.

U1, U2 - NE5532, TL072, JRC4558, LM833, OPA2134