Thank you for your replies. Several types of linear outboard PSU has been recommended in several forums. And also in this Forum.! I have though respect for you guys in here. When you say that there is no different in soundstage when using different outboard PSU. I believe that your experience with the SBT and an other PSU then the supplied already has been tested? What types of PSU has you tested? Thank you for your information regarding supply the SBT with 5.6V ( 600mV Overvoltage) when using a battery. Regarding Ground loops. I also believe in avoiding ground loops with proper system setup. And my experience is that this can be tricky... By the way: regarding avoiding groundloops: do you guys have any good experience using optical cables for the SPDIF(Toslink) connection?
Please Check this interesting link for updates regarding the SBT. http://soundcheck-audio.blogspot.com/p/squeezebox-touch-great-base-for-network.html I find this link very interesting. I have not yet tested all the modifications, so I can't comment the author modifications. All these has made me interesting in making this "upgrade". I have not yet listen to the System yet, because the PSU is yet not ready for use. One thing I can say (hear ) for sure is that a Net filter in front of the Original 5V adaptor PSU will improve sound stage. This Net filter will filter both incoming "noise" to the SBT and Outcoming "noise" from the SBT / original 5V adaptor PSU. Regarding HW modifications: It is correct that there are Switch supplies inside the SBT. And these can properly be improved. I also believe that the Clock circuits can be improved if Low Jitter(Phase Noise) OSC is installed instead of using the installed two crystals that are running on 24.576MHz(for 96KHz samples ) and 22.579MHz(for 44.1KHz Samples). the OSC must of cause have own regulation for each OSC. This will be a future upgrade. Decoupling caps in the right values and in the right places around the Digital supplies could properly also improve the Jitter of the Digital output. The reason for not buying the transport are that I'm driving the Digital output into a outboard DAC. The "digital output" Jitter of the SBT are lower when compared with a Transporter. Please see Links: Jitter measurement for SBT: http://www.computeraudiophile.com/files/SBTouch_Jitter_SPDIF_0.jpg http://www.computeraudiophile.com/files/SBTouch_Jitter_Toslink.jpg Jitter measurement for Transporter: (see fig 10) http://stereophile.com/mediaservers/207slim/index4.html I have NOT test this my self but I hope the above links shows valid measurements. Back to the Linear supply. This is my first try to make the SBT sound even better then it originally already does, but I now aware that there may not be any improvement. -- Caad ------------------------------------------------------------------------ Caad's Profile: http://forums.slimdevices.com/member.php?userid=9350 View this thread: http://forums.slimdevices.com/showthread.php?t=81682 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
