Line fuse is 5a slow blow
Internal Vcc fuses are 5a fast blow
Speaker fuses should be no bigger than 8a fast blow for 4 ohm speakers or 5-6 amp fast blow for 8 ohm speakers. Units ship with 5a fast blow speaker fuses.
Capacitance is 6800uf per power supply board, which powers both the (+) and the (-) amplifier boards. This is a more than adequate amount of capacitance, but not an excessive amount. We are finding out that, with a regulated power supply, bigger is not always better when it comes to capacitance. Too much capacitance can increase idle current, which is required to keep the capacitors charged. This can translate into higher hum levels while only reducing ripple on the raw DC voltage, not on the regulated voltage. The turn on current spike is also greatly reduced, this is what causes the lights to flicker when you turn the amp on. Also reduced is the overall voltage drop of the supply when running at high / full power - with less capacitance to charge there is more energy left to do other things, like make more audio power.
Dan