I just came across this topic and figured that I would chime in. Tonight, I just hooked up a linear power supply to the Squeezebox Touch for the first time. The sound seems much fuller and more detailed. I used the Touch's SPDIF output plugged in to my receiver. Subjectively, switching power sources back and forth several times has convinced me that the improvement is real.
I made my own power supply from a kit (sigma 11 by AMB). I was a bit skeptical about the possibility of improving a digital signal, so I built my own power supply because I would have felt stupid giving money to someone selling a solution that did not work. Having heard that the improvement is real, I would be more willing to support a complete solution made by someone else. The costs are about the same. The power supply in not in the case yet, so it is sitting out in the open waiting to shock someone. Right now, I am trying to determine the heat output for ventilation reasons. This post has prompted me to do a little experimentation. The voltage output at the power supply is absolutely stable (within about .1 millivolt according to the meter). Since I made my own 9 ft cable (just 2 wires) for the Touch, I was able to remove the shell and measure the voltage fluctuation right at the Touch. The voltage was fluctuating at that point. The voltage fluctuation is only about 5 millivolts with my 9 ft cord. It is hard to say if this fluctuation is relevant, but the theory of putting the voltage regulation closer to the Touch seems valid. I will experiment with a shorter cord and experiment with Soundcheck's firmware mods. Hopefully, getting the transformer closer to other components will not cause an interference problem. It is too late for me to consider splitting off the voltage regulator part of the circuit off from the initial power conditioning part of the circuit. I would need two circuit boards, two enclosures, and would need to put about half of the components on each circuit board. I built speakers earlier this year. After the power supply is complete, I am considering acquiring a DAC and building an amplifier. -- DaveJS ------------------------------------------------------------------------ DaveJS's Profile: http://forums.slimdevices.com/member.php?userid=50311 View this thread: http://forums.slimdevices.com/showthread.php?t=90742 _______________________________________________ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
