Salc
First I'd make sure to have high quality power receptacles, something like the Furutech GTX-D (G gold or R rhodium), Oyaide R1, or even the cost effective Acme Audio Labs silver plated 20 AMP cryo and CFC coated at $60
Then as others have suggested; power conditioner, streamer, DAC, preamp, and amp. The signal components don't need as heavy a cable, so usually a little less expensive; the preamp and amp I prefer a heavy gauge, something like 11AWG or less.