"From what I understand, all amps have built-in power filters. The better the amp, the better the filter."
Where did you get this ? A small number of high end audio manufacturers may include circuitry in their products to filter RFI/EMI interference, and/or DC on the incoming AC power line, but in general, most amps don't have such filters. The filters in amps are concerned with smoothing power supply ripple.
Where did you get this ? A small number of high end audio manufacturers may include circuitry in their products to filter RFI/EMI interference, and/or DC on the incoming AC power line, but in general, most amps don't have such filters. The filters in amps are concerned with smoothing power supply ripple.