richidoo;156573 Wrote: > The wart is a switcher with little EMI shielding. It has been suggested > that noise from the little devil contributes to the problems noted by > the PS zealots (like me).. On a scope the output seems to be OK, so > part of the problem could be radiated switching noise. So a good test > will include eliminating all aspects of the wart when listening to the > linear by unplugging the wart. > > Switching back and forth between PS's will require rebooting, DHCP > request, etc before listening can resume. During this delay the mind > can play all kinds of tricks and any semblence of memory is > compromised. I suggest you rig up a manual switch to allow an > instantaneous change from one PS to the other without shutting down the > SB. A DPDT rated for mains could be used to kill power to the wart at > the same time. Make a wiring harness using two jacks and a plug to > switch in the power source chosen by switch. Use Switchcraft part #760 > for the plug, and #712 for the jacks. You may have to replace the plugs > on the PSs with 760 to be able to use the 712 jack, but it is an awesome > jack and worth the swap. Both are available from Mouser cheap. They are > easy to solder and very high quality, plated copper, not the crap metal > of stock plugs (I dunno what bolder uses...) The plug fits SB perfectly. > 712 can take 5 amps of DC. Shack parts are rated to .5A and will > compromise the experiment. > > With such a setup you can do a direct and instantaneous AB comparison > and your mind will not be fooled by time gaps. If there is a difference > you will hear the change during the same note! You can have your friend > plug in the PSs to the switch harness so you don't know which switch > position is for which PS if you want to get psycho. > > If your system is very transparent with sensitive full range speakers > you won't need any of this, it is night and day. > > If your system is not as trasnparent then you also need to play music > that will reveal the subtle differences in PS. Choose a recent digital > recording (low noise) of classical or otherwise uncompressed, > realtively unprocessed music with crystal clear highs and thunderous > bass. I use Maria Schneider's Concert in the Garden to show off the > highs, and recent beethoven symphony 3,5,7 or 9 by Minnesota on BIS for > all around tone and good clean bass. Current pop mp3s etc won't show you > the gains as clearly. > > Good luck. Sounds like a fun experiment! > Rich Rich;
If I could only buy the above device! I will pay for the shipping... I refuse to soldier as this is a first step into territory that I'm completely at loss. I do have plenty of music to test, usually I use Chesky test disk with Rebecca Pidgeon singing 'My spanish Harlem' for jazz related listenning and then another disc, I think from Reference Recordings, for some symphonic earth shattering movements. I think I'm covered with music material. >From hardware perspective I have 2 setups Pathos Logos Amp, Triangle Celius speakers Denon AV Receiver, Paradigm Monitor towers I have also hired my 12 year old son to help me with this experiment. During the interview, he admitted total ignorance of power supply topic, actualy he looked quite perplexed. If I only had this power switch.... -- georgem George ------------------------------------------------------------------------ georgem's Profile: http://forums.slimdevices.com/member.php?userid=7335 View this thread: http://forums.slimdevices.com/showthread.php?t=29912 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
