Jeff Moore Wrote: > 2006-03-28-03:48:33 cliveb: > > You can't get DACs out of the equation. Somewhere in the replay > chain, > > you need one. The XR55 has a DAC inside. If its analogue inputs go > > through an ADC then onto the DAC, then you're right: there's no > point > > using any other DAC. But if its analogue inputs can be routed direct > > (bypassing any ADCs and DACs inside the unit), then you have to > > consider the possibility that a different DAC might be better than > the > > one in the XR55. > > I think you might be a little confused about the nature of these > Panasonic receivers, assuming that they're just like everybody else's. > These units (unless *I*'ve gotten really befuddled along the way) use > an > Equibit-chip-based power DAC -- which is to say that this PWM DAC is > (essentially) connected directly to the speakers, and powers them. > This > architecture is implemented at a low price point by Panasonic, and at > a > higher one by TacT. > > The reason one would choose to buy one of these Pannys is precisely > for > the sound quality of the D/A-converting output stage (or its potential > sound quality, after a few parts-quality improvements); at their best, > this technology can provide a spooky level of immediacy, directness, > purity, or however else you wish to describe it. It'll only be > showing > its full potential driven digitally, with internal filters and A/D > conversions switched out. > > To drive one via an analog input would not accomplish the bypassing of > the power DAC; it'd just lay the sonic signature of the DAC you added > *and* the signature of the Panny's internal A/D converter (since the > output stage needs a digital signal) atop that of the Equibit > implementation.
actually, I wouldn't want to call it a PWM DAC, it's more like a filter than a traditional DAC. To drive a digital amp with an analog signal is not realising the potential of these amps, it's like taking the Ferrari out for a drive in downtown New York. You've got to feed it digital signals. So, if you've a large collection of LPs, forget about it. In fact, it will sound bad with analog signals as it's ADC is not well implemented. The point is, pretty good sound can be achieved by removing as much of the analog circuitry out of the box and thus reaching a price point that is mass market. -- khewa ------------------------------------------------------------------------ khewa's Profile: http://forums.slimdevices.com/member.php?userid=4751 View this thread: http://forums.slimdevices.com/showthread.php?t=22502 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
