Original owner - used in one build powering Hertz HSK separates up front and HSK coaxials in the rear. This is a great amplifier with so little noise, so much warmth and has a classic look.
If you have the room, you should swap out your 4 or 2 channel digital amp for this and give it a try. I have two other amps for sale, one is perfect as a matched sub amp for this = an XS2500 and I also have a 5 channel Boston Acoustics GT-50 that is one hell of an amp - also if you have the room.