Bowers & Wilkins DB4S Active Subwoofer Colour:Rosenut it is the ONLY circuit

it is the ONLY circuit of its kind that is truly "adaptive" by addressing "tube pinch off" at higher volumes

Frequency Response: 20Hz to 230Hz +/-3dB

and often found in guitar amps

• Dual Subwoofer outputs and Dirac Live Room Correction

Bowers & Wilkins DB4S Active Subwoofer Colour:Rosenut it is the ONLY circuitBowers & Wilkins DB4S Active Subwoofer ROSENUT CALL FOR AVAILABILITIES. The Bowers & Wilkins DB4S Active Subwoofer delivers powerful, controlled bass that integrates seamlessly into any audio system. Engineered with precision, this compact subwoofer features advanced driver technology and sophisticated electronics to reproduce deep frequencies with clarity and impact. Ideal for music lovers and home theatre enthusiasts seeking refined low end