I'm looking to gain a slightly fuller bass sound. My current set up includes Quad 11L speakers and Sony CDPXB930E CD player with a NAD 314 amp. Would a change of amplifier make any substantial improvement? - my shortlist so far is: - Cambridge Audio Azur 640a NAD C352 Sony TAFB940R I would like the bass to be as full as possible (given the limitations of the baby Quads of course!). ...maybe I should be considering a subwoofer instead of amp change? Alternatively if I could trade in the 11Ls for 12Ls, I'm sure that would improve things no end - anyone know of any decent dealers in the south (Hampshire/Berks/Wilts) that would do a part-ex?