I have Power One 3A supply and it instantly made a very noticeable improvement in every aspect of the sound of my system, lows to highs, dynamics and tonal quality. I got the PS for free, so I have no bias about the improvement. Without a case, the PS is very ugly lying on the table next to the beautiful and talented SB3, so I would have ditched it immediately if there was not a very noticeable improvement.
Standard electronic engineering practice is to size a power supply as important as that in a line level hifi audio preamp with 3 times the expected current capacity. Any current measuring instrument with less resolution than human ears or at least able to accurately record 1ms peaks is not suitable for characterizing a low level audiophile grade preamp power supply. Your playback system should be moderately to extremely transparent (sensitive to slightest component changes) before you start worrying about SB power supply. The stock PS is good enough for the typical 80wpc receiver with Bose/Infinity/Polk speakers, which I imagine is the target audience for the $300 SB. If you send a hot 30Hz signal to such a receiver, you will get very little back on the speaker terminals, and the speakers will reduce that by many times again. Same with a typical circuit city silk dome tweeter. It won't make a violin sound sweet with the best tube amp in the world behind it. This is an expensive hobby, but worth every penny if you really love fine music! Still cheaper than photography!! The flame war about power supply upgrades exists because not everyone is listening through systems with the same high degree of transparency. High sensitivity, natural sounding full frequency speakers and audiophile quality pre/power amplification along with good audio cabling will easily reveal the improvements in signal with upgraded power supply. It is night and day, and very exciting to hear how such a cheap upgrade makes such a big difference. Anybody who wants to sell a good audiophile product to a large and growing market of SQB owners should consider packaging a Power One linear PS in a simple attractive box. Happy listening! Rich -- richidoo ------------------------------------------------------------------------ richidoo's Profile: http://forums.slimdevices.com/member.php?userid=3097 View this thread: http://forums.slimdevices.com/showthread.php?t=23193 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
