While the POA-1500 is a very well built and nice sounding amp, I would not use it with nominal 4ohm speakers. It just does not have the low impedance driving capabilities. Very sensitive protection circuitry. I used this amp all day long at mid/high volumes with a pair of Klipsch forte's and this combination was wonderful. For kicks and giggles I hooked it up to my Klipsch RF-63's(3--6.5" woofer array) and after some high volume listening sessions, the POA-1500's protection circuitry triggered and shut the amp down.
Oh yes, I almost forgot, those big meters are cool.
Bill