Updated Specifications for M25 series II amplifier Series II amplifiers have a terminal strip for the B+, B-, and Remote connections. Output Power per Channel (all channels driven)* Into 4 ohms @ 12.0 (IASCA & USAC rating) .................................................. 25 watts x 2 Into 4 ohms @ 14.4 VDC ............................................................................. 65 watts x 2 Into 2 ohms @ 14.4 VDC .............................................................................