Relationship of amplifier sound to transformer quality?

a] a quality output transformer is the heart of any good tube amplifier.b] do not try to combine the outputs of two separate transformers (AC power nor audio output). they will both be unhappy to say the least.c] do not try to combine the outputs of two separate AC or DC supplies. They will be more than unhappy.

@speedskatere,this is for ss psu.

@imhififan...So in this configuration, would it be beneficial to increase C to 20,000uf total for each psu, total 40,000uf per pair of psu? Or keep each psu at 13,600? TIA

would it be beneficial to increase C to 20,000uf total for each psu, total 40,000uf per pair of psu?

Yes, check dimensions if the capacitors can fit in before ordering. 

One function of the capacitor is to smooth AC ripple voltage on the supply rails, higher capacitance is better, provided its not over-stressing the transformer and rectifier, 10,000uF should be fine but do not go any higher.