Hi, I just got myself a pair of floorstanders, Tannoys Mercury V4 and Onkyo A9155 amplifier. All good except I must crank the bass pot all the way up for any reasonable bass and even then it's not really powerful. Cables are quality and connected properly in phase. I thought about replacing it with Denon PMA510AE as it's within my budget. Anybody with similar experience? Thanks.