The ada PF-2501 Stereo Amp is a beast of an amp. Rated at 250 wpc into 8 Ohms, 450 into 4 Ohms, and 600 wpc into 2 Ohms, this amp will drive any speaker. Very similar to ada's current flagship the PF-2500 ($4300) but without XLR inputs. This amp has a huge toriodial power supply and four huge caps with over 200,000uF of capacitance. It has so much reserve power that it will play for a couple of minutes after you turn it off. Face is very nice, a few marks on top but looks great overal, really clean. It also has a brand new low dB fan . Display works and looks great, you can also turn it off so it's completely dark. 120v/220v operation. Awesome amp with silly amounts of power. This amp is overkill for my stand mounted monitors but is perfect for floor standers, ribbons or panel speakers. This is the best amp you've never heard of. This was ada's companion to their top of the line MPA 501. Was $3700 new. Local preferred and will deliver within a 50 mile radius of Boston or Providence.