OK, i moved on to building the power supply of my amp. My choice is a dual capacitance multiplier (for the positive and negative rails), feeding the two amp boards. Now, i've settled for 20000uF as the input capacitor. My concern is, and specially after checking prices: has anyone tried paralleling a lot of smaller value capacitors (say, 10x2200uF or 20x1000uF)? It's a bit cheaper, ESR it's lower (for whatever's worth) and i imagine long term relaibility is better with smaller caps... am i right?