Deleted
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Post by Deleted on Dec 13, 2009 6:02:52 GMT
Does anybody know of, or have experience with the AQVOX ? Hearing the massive difference in favour of the Marantz SA11 over a modified Oppo DV981HD when used purely as a Transport with SPDIF OUT, really has me wondering. Alex www.aqvox.de/download/AQVOX-highend-CD-drive-E.pdf |
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Will
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Post by Will on Dec 13, 2009 9:57:01 GMT
I've not, but having a look at the blurb and the picture, It look like they've found a cd/dvd-rom drive they like the sound of, and popped it into a nice case, after they disconnected the fan.
More is made of controlling the speed of the drive via software, than the hardware itself.
I reckon the BR drive, dampened/isolated within an inch of it's life, and fed a clean supply, would be more than equal.
The proof though, is to find out what the drive they use is, and purchase one. When/If one of the well-heeled guys at CA buy one, it should report the drive's ident under system sevices once connected. This may be a more cost effective way of doing it, and comparing to other drives.
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Deleted
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Post by Deleted on Dec 13, 2009 10:12:05 GMT
I've not, but having a look at the blurb and the picture, It look like they've found a cd/dvd-rom drive they like the sound of, and popped it into a nice case, after they disconnected the fan. More is made of controlling the speed of the drive via software, than the hardware itself. I reckon the BR drive, dampened/isolated within an inch of it's life, and fed a clean supply, would be more than equal. The proof though, is to find out what the drive they use is, and purchase one. When/If one of the well-heeled guys at CA buy one, it should report the drive's ident under system sevices once connected. This may be a more cost effective way of doing it, and comparing to other drives. Will You could be right. Their software price (Asio) and delivery prices are a big turn off too. Alex |
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leo
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Post by leo on Dec 13, 2009 11:57:12 GMT
I no longer have the Oppo but wish I'd have looked at the Spdif out circuit, tbh even after tarting the psu up a bit I didn't rate its spdif out , seems to be a big variation in quality with spdif outputs of cd/dvd players.
So much for them sounding all the same ;D
What bandwidth is your scope Alex?
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Deleted
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Post by Deleted on Dec 13, 2009 12:06:25 GMT
I no longer have the Oppo but wish I'd have looked at the Spdif out circuit, tbh even after tarting the psu up a bit I didn't rate its spdif out , seems to be a big variation in quality with spdif outputs of cd/dvd players. So much for them sounding all the same ;D What bandwidth is your scope Alex? Leo My scope is only specced for 6MHZ. High level stuff can be seen as high as 27MHZ, but no help in this area. I believe it is coming down to substantially built earlier CD players, and upmarket ones like the Marantz SA11, and the cheap and nasty flimsy plastic types of today. Incidentally, I rather naughtily made the remark that the bits from both transports would have been the same ! ;D Alex |
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leo
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Post by leo on Dec 13, 2009 12:17:43 GMT
Agreed, apart from the cheapo plastic a lot of the dvd players cram so much crap into a single IC including the spdif out its not surprising some are not that good, things tend to get messed about and end up compromised, noise, poor pcb layouts and spdif drivers/buffers can be a total mess
I was going to suggest you look at the spdif out (whilst loaded) at the dvd player end and the dacs input just to see how clean it is, should look like a square wave but a lot look messed up.
It can seem obsessive faffing about with the spdif but the results can be quite surprising
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Deleted
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Post by Deleted on Dec 13, 2009 12:46:39 GMT
Leo I am way ahead of you. You have been playing around with those Leggo building blocks for too long !  Marantz didn't go to all that trouble with honeycomb chassis, and players weighing so much that you could almost get a hernia lifting one, just for bragging rights ! ;D (Think Shigaclone) Don't forget that we haven't even considered those damn SMPS yet either ! (>100VAC 50HZ measured at the earth side of the RCA outs, and most likely SPDIF OUT as well !) The sad fact is that DVD players in general, are nowhere near as good at playing CD as a dedicated CD player with a linear PSU. This fact is conceded by many designers, who readily admit that CD playback is a compromise. Alex |
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Post by Deleted on Dec 13, 2009 20:20:59 GMT
Miguel
It's too big and bulky, and I would only use the transport part of it.
It's owner conceded that although it's direct playback was trounced by the Benchmark and X-DAC for SQ, that it did make a fine transport for them.
I imagine that he will now be using it more in that manner from now on.
Alex
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FauDrei
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Post by FauDrei on Dec 13, 2009 22:07:40 GMT
Hey, your favourite black sheep here... I agree that, at the moment, CD players are the best transports. But this is soooo going to change... HDD/SSD network players with fancy remotes and wall TV displays will sooner or later prevail. While we wait for USB 3.0, I2S transport protocol standard, cheap multiterabyte SSDs, internal laptop atomic clocks and other goodies, we will play with our computers and mod the hell out of Monitor 01 USD's and M2Tech hiFaces in pursue of (HiEnd) CD player quality SPDIF out.  |
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Deleted
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Post by Deleted on Dec 14, 2009 1:05:55 GMT
Hi "favourite black sheep"
Faudrei
IF they do, they will almost certainly be dumbed down to the requirements of "she who must be obeyed" with the only ones readily able to work out how to use them to best advantage will be the children of the family,just like many existing families.
Sound quality will be of a typical background "Muzac" type where the crushed dynamics will enable "she who must be obeyed" to carry on a normal conversation over the top of them.
BTW, the amplification and Infinity speakers with Raal tweeters, was so good on Saturday, that even the other main sceptic here was able to tell for himself how bad the laptop USB route was in comparison to even
the Oppo DV981HD player, and (hopefully) also how much better the Marantz SA11 sounded as a transport, despite almost certainly spitting out the same binary numbers ! ;D He! He!.
Yes, the differences were VERY obvious !
SandyK
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rickcr42
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Post by rickcr42 on Dec 15, 2009 4:15:50 GMT
Think jitter
A single box solution will almost ALWAYS have lower jitter than any but the extreme best two box solutions (Wadia,Weiss,etc but only if you add all the "blocks") because it eliminates most of the sources of jiiter in na multibox setup :
1-The MUX/Send/Receive/DEMUX of the data stream in any SPDIF/AES3 connection
2-Loss of clock integrity due to the process above
3-Any and all clock power supplies in the downstream "boxes"
Remember,originally the spdif feed was meant ONLY as a means to verify data stream and NOT as a means to feed the signal to any outtside audio devices.
This does not mean that ALL "players" will beat ALL "transport/DAC" setups but all thing being equal it is harder to get there in a two box setup and especially so in a DIY or bugest system or worse,aftermarket "kits" designed by folks with zero training in the fields of ultrasonics and/or digital audio.
In fact,I use ALL my players as just that-players and have reserved my DAC use strictly as the PCM componant of a USB computer feed (Modified HagUsb/Modified DITB),as a REAL DAC STAGE for my vintage Panasonic PCDP with a true digital output (mini TOS) and that's about it !
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