Discussion in 'DACs' started by jmkeuning, Jun 27, 2018.
gvl is correct, the Parasound 1100 uses two PCM63 Burr Browns of the J spec variety.
While on the subject of the Parasound D/AC-1000, has anyone modded one yet? I know there is a German company selling a new receiver and filter chip but I'm not convinced it will do much good for Red book.
Op-Amps will require the installation of sockets, not really a big deal but has anyone gone there yet? I picked up a set of K grade chips. Figured that when I install them I might be open to other mods as well.
There is so much done right in this build with the three linear PS and overall solid construction that I'm surprised it hasn't developed a sort of cult like following.
Thanks gvl for your response. I do understand what you are trying to convey, but there are a few misconceptions I think.
Day one for Philips was March 1st 1983 with the TDA-1540 ceramic pack 14 bit converter with a 4x OS chipset. Day one resolution was 15.6 bits (according to Philips) Philips used two, one for each channel.
Day one for Sony, October 1st 1982 was the CDP-101(commercially released in Japan, six months before Philips) with the in-house produced CX-20017 16 bit D/A with a 16 bit resolution. Sony used one and shared it between channels, but made some tweaks to minimise the phase delay.
Many cheaper machines used the existing Toshiba 14 bit non oversampled converter in the early years of CD. Unfortunately, that meant budget buyers didn't hear what the format was capable of.
At the time of release, the playback equipment (CD players) exceeded the abilities of any and all recording equipment in terms of ENOB. The A/Ds simply weren't anywhere near 16 bits with decent linearity.
So we had domestic replay equipment with noise floors down -93dB or more, but recordings (particularly classical with very quiet parts and large dynamic range), that either tailed off into 'fuzz' or echoes that were lost in 'fuzz'. We'd turned up the volume to hear the super quiet bits, not realising that THD at low levels in PCM was extremely high. We were used to analogue where low levels seemed OK (albeit 30dB greater in level) and it was the loud bits that distorted. Digital was the polar opposite.
As time went on, the A/Ds and recordings got better. Very quickly in fact. It is my belief that much of the early criticism of the CD players themselves was completely unfounded. I have many CD players and plenty of 1st and 2nd gen classics in my collection. They are audibly indistinguishable from many later TOTL units and often very difficult to separate on the test bench.
The technical test CDs released in 1982/3 showed what the format and the machines of the day were capable of- it was the commercial releases of actual music that hadn't caught up. That said, there are some exceptions and they were frequently used as demos in the early years.
Nice post. I think there are a lot of misconceptions over the sound quality/capability of early CD players and their associated DACs. I remember back when CD players started hitting the stereo stores. The issues with both early digital recording/mastering and some of the early internal DACs were being discussed even then. No doubt there were some outstanding sounding DACs produced for CD Redbook and sounded great as long as the source material was of good quality. Quite a few of these are still around today and are sought after for their sound quality. Some, like myself, prefer these for 16/44.1 files over the newer DACs. If you don't have a need to be able to decode HiRes files, the older models can be a good solution.
The Starting Point Systems DAC3 is tonally a beautiful sounding DAC. Not quite detailed enough though. I didn't like the Schiit Modi 2 Multibit at all.... Too forward and to my mind digital sounding.
The best I've used is a Gieseler Gross DAC though the price is a bit over the top.
I did acquire a Weilang Audio DAC which is based around the same AKM 4497EQ chip as the Gieseler. It has some transformer hum though sounds incredibly similar though without that special something that makes the Gieseler the top DAC I've ever heard. It's just as natural and detailed though lacks the transparency and presence of the Gieseler.
I'm going to roll the OPAMPS for some HDAM based ones and also try Burson V6 Classics. See if that changes things. I've also some transformers on the way which I suspect might bring it very close indeed with OPAMPS removed.
Less than a quarter of the cost though so a very worthwhile option. I'll probably stuff woolen socks around the transformer rather than sorting the hum.
I believe there's a lot of excellent older Dacs. Read the reviews that were written at the time of their market introductions, and narrow the list to 2 or 3 Dacs. Then make sure there are 3 or 4 reviews that agree on the the quality of the short-list Dacs, and make your choice, based on which one you think will sound best with the attributes of the other key components in your system.
$500 should get you a $1200-1500 Dac. (2002 prices).
I have an MF A3-24 Dac, being fed by a very basic Denon CD changer, and the sound-stage and definition is impressive. Make sure that your transport has a digital coax RCA output. The Toslink digital connections on my CD to Dac sound like s**t.
I know there are lots of current Dacs that sound great as well, but I would think the comparative ones would cost you a lot more than $500.
I tried a Cal Audio Sigma dac way back when and was disappointed with its sound. At the time I had a Micromega DuoBS2 which outperformed it in just about every sonic parameter except dynamic contrasts. I was intrigued by the Sigma because it used a tube in its signal chain and I like the sound of tubes. However, the Cal Audio sounded nothing like the sound of tube equipment I have owned or heard. I haven't heard the Theta Progeny Dac, but I have owned the Theta Pro Basic I and II and have also heard the Theta Pro Gen V. I preferred the Micromega Duo BS2 to the Theta Pro Basics. However, the Theta Pro Gen V is one of the best sounding vintage dacs I have heard. I currently use a Micromega Mydac and it sounds better than the Micromega DuoBS2. I also have a Musical Fidelity V-Dac that also sounds a little better than the Micromega DuoBS2. My totally subjective opinion is that some newer dacs can sound better than older ones because the newer ones may have circuitry that reduces jitter which was not available many years ago. When I was using the older Thetas and the Micromega DuoBS2, I couldn't stand the sound of them unless I used a very good transport and had an Audio Alchemy DTI Pro in the signal chain. With the Mydac, I am using a relatively cheap Harman Kardon DVD player as a transport which sounds ok and my desktop computer through a Musical Fidelity V-Link 192. With the V-Dac, I am using an old Sony ES Changer and Chromecast Audio. Both of my Audio Alchemy units broke and could not be repaired but I can't say that I miss them now.
The Theta Pro Gen V DAC gets good reviews. I don't know the other DACs you mentioned other than the MF V-dac, and I haven't heard it. I also, have a very basic CDP that I use as a transport. The MF A3-24 that I have makes it sound very good.
In the review from the guy that designed it, he said that the 24 / 192 upsampling greatly reduces the Jitter. And the A3-24 also has oversized chokes from they're high-end MF Nu-vista CDP, added to the power supply which eliminates any noise or interference from there. So I believe that it actually has the same or better level circuitry compared to the current models, but of course I'd have to listen to two samples to know for sure.
I, also, have an MF V-link 192 to connect my computer to the system, but my CDs always sound much better then the 96 or 192 Hertz music files I stream or download. It's like the top end and bottom end are stripped off the files. Have you had this issue? Do hi-rez music files sound as good or better than your CDs? I'd really appreciate your opinion on this, niws.
I haven't tried streaming any hi-rez files from my computer. I use JRiver to play back my ripped cds and have it set to upsample up to 192K. I have not noticed any significant degradation in sound quality like you mention when playing back my ripped files, but that may not be a good comparison. I do slightly prefer playing cd's through my transport than the computer (slightly richer sounding midrange), but I use computer playback more for background listening. I also stream Spotify Premium and Pandora through my desktop.
I do like the MF V-Link 192. I found it improves the sound of my HP Desktop computer significantly compared to using the coaxial digital output of the computer.
Nothing wrong with older dac's.
Niws: well then, I guess my issue of poor sounding hi-rez files is the software. Some one had suggested that earlier to me,but they didnt have an MF V-Link 192. I've be using VLC as a player/interface (cuz I'm cheap), and I should really get a decent hi-rez music player like JRiver or Roon etc. I'll work on that. Thanks a lot for the info, it really helps.
Jmkeuning: slow_jazz is on the ball when he said the older Dacs are good. My MF A3-24 is about 18 years old and it really is great. Very musical and yet detailed. And theres lots of other ones depending on your taste.
Separate names with a comma.