I have an old Rotel amp - RA 820 BX which is attempting to drive the compact AVI NU Neutron speakers, source being a Rotel RCD 971 CD player. The sound is flat, lacking all depth and resonance - this is obviously a budget system, but sounds awful, although acoustic guitar is better reproduced. Is the problem in the old amplifier, as I've heard these speakers take some driving to get the best out of them. Anyone have any ideas? What should be replaced here first? Cheers, Ben.