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In Reply to: New Accuphase flagship posted by eduardoo on September 27, 2006 at 02:54:12:
DSD CONVERSION (MDSD "Multi Double Speed DSD")
The DC-801 converts things differently than the DC-101. The DC-101 converted DSD to 176.4kHhz/24bit PCM signal and then converted it to analog. According to the StereoSound article, the DC-801 converts DSD DIRECTLY INTO ANALOG with NO PCM CONVERSION. The article says that the main reason why the PCM conversion method was used up to now was in order to reduce noise in the ultra high-frequency range. The old method (used on the DC-101) apparently used digital filtering in the DSD-to-PCM conversion, then another analog circuit filter afterwards to make things "smoother". The DC-801 apparently uses a "moving average" filter for SACD conversion comprising of 8 DAC circuits which are each shifted 1 "clock" from each other ("clock" is not defined but clearly means 1 unit of format frequency, so for DSD this would be 1 step out of 2.8 million). This both lowers high frequency noise substantially and makes a cleaner analog signal.CD playback on the DC-801 (MDS++ "Multiple Delta Sigma ++)
Digital Upsampling: ALL digital inputs into the DC-801 apparently get upsampled using a Xilinx-made DSP engine run by an Accuphase-designed program. The effect is that DSD is upsampled to 5.6Mhz (whether 16/44.1 CD gets upsampled by a factor of two or up to 2x DSD is unclear). This means that the moving average conversion method will actually take place over less "time" (1/128fs per clock or 1 step out of 5.6 million rather than 1 out of 2.8mln)
PRICE
It's in the 2 million yen range (actually the goal is to not go over 2 million yen). I imagine that is the Japan price and as is traditionally the case, the US prices will be higher.
FWIW... that funny character betweeen the 200 and the "yen" character is a unit of measurement of "ten thousands" (pronounced "mahn" in Japanese). The Japanese large numbers units are confusing to people used to using thousands and multiples thereof. In Japan, the major large number units are units of ten thousand, 100 million, and a trillion. There may be a unit above that but in 15 years I haven't heard it (then again, the next unit would be 10 quadrillion, which is pretty darn big).LOOKS
Somewhat "retro". If I had a scanner, I'd put a picture here. While all Accuphase has a "traditional" look to it, this has echoes of the mid-late 80s Accuphase stuff - hand-in-hand with the looks of the new C-2810 (which is on the Accuphase homepage); it even has the same persimmon wood case (which I think looks really luxurious).SOUND
The DP800 and DC801 were still being finished in August when the article was written so no listening test was done. The first time that they will be heard (outside Accuphase) will be at the Tokyo International Audio Show (October 20th to 22nd at the Yurakucho Intl Forum Hall between Yurakucho and Tokyo stations).
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Follow Ups
- Some correction/details from the article - looks promising - travisty 19:53:07 09/29/06 (0)
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