opaqueice;190717 Wrote: > We're not talking about scientifically acceptable results here - just a > minimal, good-faith attempt to verify there really is an audible > difference. As some people never tire of pointing out, a negative > result on such a test doesn't prove it isn't audible - but a single > positive result provides pretty compelling evidence it is (although of > course it doesn't prove anything either). So the deck is really > stacked in favor of someone that claims there might be a difference. > > You're complaining audio memory is short, so the difference might get > lost due to too-long switching times. Just think for a moment about > that. A volume difference of 1 dB, and probably a lot less, is easily > identifiable in these tests. Something which isn't is therefore more > subtle that a slight change in volume. It's so subtle you can't keep > it in your mind long enough to tell the difference after a few seconds. > At that point, do we (as audiophiles) really care? If the answer is > yes, we'll have to work harder to make DBTs which are capable of > overcoming that (and they exist, for example computer-based tests). > But for me if I can't hear the difference after a second or so spent > switching something, I'll find better things (like speakers and room > treatments) to spend my time and money on. > > > > That's your perogative as moderator, but personally I don't think > censorship is ever a good idea (and that applies equally to the > hydrogenaudio forum policy). I'm glad there is no such policy here, > and I don't find it worthwhile to read or post much on either of those > fora because of those policies.
opaqueice, Please note the section of my post that you didn't reprise.... occam;190702 Wrote: > ..... > Its straightforward to set up valid SBT or ABx tests, iff you have > circuit level access, and you're dealing with a situation where > (generally) nothing is turned off, levels matched and interruptions of > sound <5 seconds. This is why the Good Lord, in Her infinite wisdom, > has given us 4pdt switches, if you're dealing with something as > straightforward as power conditioning. And its not that incrementally > difficult to extend those tests to DBT with a computer and sufficient > quality relays. But other areas.... good luck.... I'm well aware of the issues of subjective preference for the louder, all things being equal, or even not so equal. But luckily for me, my diy interests are in the realm of power conditoning/supplies. And in that specific situation, volume issues are reasonably moot. My effectively Bailey topology power amplifier is basically a big opamp. Same for most preamps. And both linear and switching supplies are generally controlled by opamps, so unless there is something radically unstable in the voltage references of those supplies, those issues are not issues with reasonable care. Assuming adequate voltage rails, gain is determined by the feedback resistors. A compentently implemented resistive attenuator or the digital attenuation capability of the SB, make volume differences (at least at the output of the amplifier) a non issue. As far as testing amps, preamps, cables, etc.... good luck with that. And if you're willing to surgically get at the wires of a ps and/or conditioner, switching for ABx, SBT, and/or DBT is quite easy. I don't buy anyone's supplies or conditioners, I build them. Iff'n you think the $20 it takes to build are really excellent power conditioner is money better spent elsewhere, thats your call. If you think the mains power in the Nu Yawk is adequately addressed by the switching carbuncle provided with the SB, you're a lucky fellow. -- occam ------------------------------------------------------------------------ occam's Profile: http://forums.slimdevices.com/member.php?userid=949 View this thread: http://forums.slimdevices.com/showthread.php?t=33547 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
