mamsterla Wrote: > I forgot to mention that my SB2 is modded with a linear, LT1086ADJ > regulated PS and has a new Rubycon ZA "big ass" cap with a 0.01uF > Siemens stacked polyester bypass cap on it.
you may want to try w/o that polyester film cap in there too. film caps actually aren't very good for supply bypassing in high-speed (e.g. digital) circuits. the parasitic inductance is much higher than eletrolytic or chip ceramic caps and can screw up the sound. YMMV, but some people feel they add coloration. i recently opened up my lightly-modded Sony SACD player, which i've felt for a while was a little bright and tizzy up top. i forgot i had previously added Panasonic polypropylene film bypasses by the output opamp. the Pana P is a pretty good cap, but i realized this was a no-no and took it out, replacing it with some 10uF Panasonic HFU electrolytics i had in my parts bin (they're predecessors to the FC caps). ah, much better... after some break-in much of the tizziness was gone. i'm now very wary of using film caps for PS bypassing anywhere when high-frequency, low-ESR 'lytics (like Pana FC) are already in place. quick question: does anyone find that the SB lacks a little "oomph" in dynamics or bass with the opamp taken out? i mean on an absolute basis, i.e. compared to a good external DAC, not the stock SB. my experience with bypass mods is they are very transparent, but sometimes the impedance mismatches caused by the removal of buffering can make the sound a little thin or anemic. is the BB DAC chip really ok by itself? -- dorkus ------------------------------------------------------------------------ dorkus's Profile: http://forums.slimdevices.com/member.php?userid=3373 View this thread: http://forums.slimdevices.com/showthread.php?t=19822 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
