The diode bridge converts the AC voltage out of the transformer (after being converted to a lower voltage). The only ways it can offer improvement are:
1) little more reliable
2) Because it is operating at a lower percentage of its rated voltage, it may have lower reverse voltage leakage currents that may somehow improve the sound.
3) Being higher voltage may mean that it has less capacitance input to output which would help keep noise from passing thru.
That all I've got.
1) little more reliable
2) Because it is operating at a lower percentage of its rated voltage, it may have lower reverse voltage leakage currents that may somehow improve the sound.
3) Being higher voltage may mean that it has less capacitance input to output which would help keep noise from passing thru.
That all I've got.