We accredit certain brands of amps with certain qualities... For example Crown being good for subbass etc. But is it not the stiffness of the power supply (PS) that is important? The size/ quality of the power transformer, amount of filter capacitance and its ability to discharge and charge quickly. Other factor is the ability of the output transistors to discharge this current. This is related to their type and number.
It is said that the newer light hi efficiency amps with small modern PS do poorly in subbass use... "they can not pull energy out of the AC line fast enough as opposed to the heavy amps that have energy stored in the transformer and caps etc. Any comments or experienced opinions appreciated.