This is an awesome unit, especially when paired with singledriver full range speakers that are medium in efficiency. I found mate to my pair of Bob Brines FTA-2000s with a pair of Scott Nixon Opchip monos but when I was able to snag a Peter Daniel's Patek SE years back, it really opened my eyes to the SOTA sonics that can be had with such simple, yet extremely well executed designs as only Peter Daniels can fabricate. If your speakers are Singlefullrange types and have never had an experience pairing them up with a well executed Opchip type of amplification, you are missing half of the fun.