I have an IO driving a pair of Falcon gold badge LS3/5As and the result is excellent. Was meant as a stop gap and actually belongs to my son, but the IO is absolutely cracking. Very musical box of tricks and every bit as musically engaging as my previous pre-power at 10X cost... It's not the be all end all ... not the most detailed amp ever, nor does it throw a particularly expansive soundstage but plenty of power in my room (20X10, firing across the room...and simply makes music fun and foot tapping. Bargain at £379