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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!uwm.edu!csd4.csd.uwm.edu!info-high-audio-request
- From: case@infonode.ingr.com (Bill Case)
- Newsgroups: rec.audio.high-end
- Subject: High-end DAC trials
- Date: Mon, 21 Dec 1992 23:39:08 GMT
- Organization: Intergraph Corporation, Huntsville, AL.
- Lines: 149
- Approved: tjk@csd4.csd.uwm.edu
- Message-ID: <1h9rolINN6uk@uwm.edu>
- NNTP-Posting-Host: 129.89.7.4
- Keywords: Theta, VAC, Wadia
- Originator: tjk@csd4.csd.uwm.edu
-
-
- Another tale of Vinylphile looking for an honest DAC.
-
- Disclaimers and claimers:
-
- o I know that "new" often feels like "better", and
- for me I tend to prefer the new/different about 60% of the time.
-
- o On this venture into DAC-land, I'm obviously throwing money
- at the problem to see what results.
-
- o I tend to put credence in things which I can't necessarily explain.
- I'll notice if I suddenly start listening to entire songs instead
- of test snippets. I also put credence in what just ends up being
- being plugged in for long periods. Something non-verbal may be
- causing either.
-
- o I think I was pre-disposed against the Theta.
-
- Day 1: Nashville - home of Twitty City
-
- Three of us started by listening to a PS Ultra and Krell DSP on
- Centaurs. The whole demo was badly done, and no-one had any great
- feelings about either. If was also hard to get a home-demo unit,
- so on to Cumberlands (which is a great store.) The demo system was a
- Wadia 3200 transport, ARC sp14 preamp, the new Classe' 700WPC mono's,
- and Watt/ Puppy's. Sorry, can't swear to the cabling. The DAC's demoed
- were the Wadia 2000, the Theta GenIII, and the Valve Amplification (VAC
- DAC). The Wadia is gosh-awful expensive, but sounded very natural.
- Listening to a female singer, the sense of being relaxed was conveyed when
- she was singing softly (rather than just less loud). I believe a fellow
- DAC searcher in this news-group had somewhat similar reactions. The Theta
- seemed to convey less of the emotion, and on this system, had a somewhat
- flatter depth. Where the Theta excelled was in separating instruments into
- specific sound sources, and adding a wider sound field. A Bitwise Zero
- produced more of a lump of sound in comparison. There was a definite change
- in the sound of a triangle being struck. On the Wadia and VAC, there was a
- slight dampening, as if barely touched. It was a colder sound of metal (but
- convincing), whereas the Theta made the triangle convey a glassy resonance.
- It was impossible for me to tell which was right. The VAC seemed to convey
- micro-dynamics better than any, so instruments with a loud/soft phased
- attack were rendered convincingly.
-
- By listening to something as expensive as the Wadia, a false sense of
- "reasonably priced" was conveyed to the VAC and Theta, so I took both
- overpriced units home.
-
- Day 2: The basement.
- I also took two pairs of cardas hex5 speaker cable, which an individual
- was trying to sell. My system consists of Wadia 3200 transport (purchased
- as demo), Levinson ml28 preamp (purchased slightly used), McCormack
- DNA-1 amp (new), and ML Quests speakers (purchased slightly used), 1 meter
- of Tara CD interconnect (new), and 5-ft of Maestro speaker cable (purchased
- used). Plus a good phono. I also borrowed a meter of Purist digital coax
- (the Theta was not the balanced version), and some AT&T optical (both units
- claimed to support this.)
-
-
- CD's used were "Waiting for Columbus" - Little Feat (live), Gracelend,
- Mickey Hart's "Dafos", a "Best of the Fleetwoods" (antiquated mixing, but
- very natural voice), Tracy Chapman's "Matters fo the Heart", and cut 3
- from "The Belles of Dublins" (Chieftains' squealing fiddles, a wobbling
- drum, with Elvis Costello singing a ballad - an acid test).
-
- To get the cables out of the way, the Cardas was clearly better, IMHO.
- The Maestro had a boomy bass and overall more "hifi" sound on my system.
- I tried bi-wiring, and there's a little less blur in the mid-range. Less
- false overtones in the bass. This was pretty maddening to try to hear.
- There's a speaker switch for bi-wire, so I suspect the difference is
- mainly inside the speaker.
-
- Now I entered the wacky world of high-end. I listened to the Theta for
- some time, and it was good. Then I was then anxious to try the VAC.
- The nobs, switches, and "look" on this is incredibly klunky. That's
- surprising since their amps are elegant. Anyway, I couldn't get the
- optical to sync, so I called Cumberland's, who called VAC, who provided
- the following explanation:
-
- "There's too much light coming through that optical. It's designed
- to be run for miles. That's why we ship spacers (filters?) to
- cut the light down. Since you didn't get those, you can try to
- spiral the cable around a pencil, then tape it down when the
- signal sync is achieved"
-
- Good grief!
-
- I tried the coax instead, and used the balanced connectors to the ml28.
- Things sounded really good to begin with , but when I played the Belles
- of Dublin, the fiddles and Elvis just became screachy splatterings of
- sound. The RCA from the VAC DAC to the ml28 made this alot better.
-
- I then took the VAC over to a friend's system who has the Theta GenIII,
- Duntech Soverigns, and Classe' 1000 mono's. On his system, the VAC was
- very good on voice. But the Theta was no slouch, and made instruments
- stand out more. He was happy with the Theta.
-
- Day 3 - listening session in my basement.
-
- Three of us listened to the same stuff. Little Feat was impressive on
- the Theta. We switched to the VAC and it was universally felt that the
- VAC was not even close - the VAC was MUCH better. But I showed how it
- overloaded the ml28 on ""Belles of Dublin", and one listener asked if I still
- had the Perreaux SM2 preamp. He had tested this on the bench and found it
- almost impossible to over drive. When I put the Perreaux in, the VAC was
- vert VERY good. The sense of "live" was there on "Waiting for Columbus" and
- sound generally opened up on all recordings.
-
- Conclusions:
-
- o VAC - the company is a little strange, but deliver great sonics,
-
- o For the price, VAC shouldn't have so many warts.
-
- o Tubes get voices right in a way I've never heard on solid state.
- This is my third encounter with this, even though I've never
- owned any tube gear. There's a blare and fog
- around solid state voices which melts away on tubes. You
- suddenly clearly hear when a singer is out of breath at the
- end of a line and forcing the last words out, or that their
- head turns from the mike, or a slight accent, etc..
-
- This makes me curious about the VTL Straightline with
- Ultra Analog DAC and tubes. Anyone experienced it besides "Audio"?
-
- o DAC's are system dependent. The best is "per system".
-
- o Preamp overload may explain why I hear so much blare when I
- have systems demoed with a singer forcefully hitting a loud,
- high note. I think I'll sell or trade the ml28.
-
- o Someone said "The Theta is for solid state fans, and the Wadia
- is for tube fans". Maybe there's some truth to that.
-
-
- I returned both units and decided to wait to January when Wadia, ARC,
- and likely others vendors, will have newer products. The VAC sonics is
- still the leading choice, but I'm hoping for a cheaper, de-warted
- successor of it, or a great, affordable Wadia, or the Vimak, or.....
-
- All, IMHO.
-
- Bill Case
-
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