I was wondering if driving big speakers, in my case the kef reference 2 as pictured here http://users.skynet.be/bramdo/BRAM/HOBBY/hifi.htm#SPEAKERS, is hard for a reciever. I used to play with the yamaha dspa2 and replaced it with the new yamaha rx 1400 rds. Altough the stereo performance has improved i stick with my question of adding a poweramp would give better control. I always have the feeling that i don't use the potential of the kef's. A powerfull amp would beat my cash potential so i was wondering if the low price i paid for the yamaha (only 300 pounds since i could trade the old one) could give me satisfaction by spending a bit more on a poweramp. I like the thule ia350 b which is a 5 channel poweramp that can play in pure class a when used in stereo but it costs 2500 pounds! Any experiences with this problem?