4 x 65W max. 2 stereo stable. Class AB. Audiophile-grade components. Continuously-variable 12dB per octave high pass & low pass crossover. Continuously variable 18dB bass boost. Buffered preamp input. High-efficiency MOSFET design. DRIVESINK heat management systemThe Okur Series from db Drive combines technology, enhancements, power and control for a performance that has never been better. The 4 x 65-Watt Okur A3 Series 4-Channel Amp features a DRIVESINK heat management system to protect you and your system while delivering the sound you deserve.