Legendary Mark Levinson Dual Monaural Power Amplifier #334 by Madrigal Audio Labs with Upgraded PowerLink Plus Transparent Audio Power Cord. This is an outstanding amplifier, rated Class A by Stereophile. 2 channel: Output Power/Channel 125 Watt, 250 Watt, 500 Watt. Output Impedance /Channel 2, 4 & 8 Ohm. Size: 17.6" W x 18.9" D x 9.3" H. Madrigal says: Your Mark Levinson Dual Monaural Power Amplifier is charcterized by its remarkable ability to pass a musical signal w/utter integrity, regardless of how demanding that signal and the loudspeakers might be. When called upon to do so, your amplifier is capable of generating truly prodigious power levels into virtually any speaker load, on either an instantaneous or a continuous basis. Tested. Estimate $1250-1500.