Have you allowed sufficient time for the power cords on your DAC and transport to break in? Do you leave them turned on all the time? If you replaced the cords on your DAC and transport with your preamp and amp still turned on, try turning everything off for about 15 minutes and then re-powering in this order: preamp, transport, DAC and amp.
power cords- problems using too many cords ?
i started out using my first cord connected to my amp, liked very much. then went to preamp, also liked very much. i then tried my dac and transport, and now my system sounds bright. are 4 pc too much in one system. they are all the same brand and seem to be very good quality. any advice?