TVC & AVC predojačevalci

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softspeaker
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TVC & AVC predojačevalci

Postby softspeaker » 12 Mar 2009, 14:46


andrej
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Joined: 12 Mar 2009, 00:38

Re: TVC predojačevalci

Postby andrej » 29 Jun 2009, 16:17

jazst, s promitheus reference verzijo.

lep zvok, pod nizkimi glasnostmi se sliši vse nianse, detajle, ne izgubi zapisa kot ostali predojačevalci. v mojem sistemu se je obnesel odlično, v sistemu njegovega lastnika + še pri enemu kolegu pa smo zaznali manjši roll-off na basu. po moje so kriva razmerja vh/izh impedanc, zgleda, da se ne razume z vsemi končnimi

zdaj imajo na promitheusaudio.com akcijo in pošljejo robo zastonj (prej cca 80-100$ poštnine) in razmišlajm, da bi si nabavil navadno verzijo, menjal selektor in dodal enega na 5-7vhodov ker original ima samo dva ker je absolutno premalo. in ohišje bi menjal ker mi ni najlepše :bruhica:

in če mislim vse to počet je že za razmislit o samogradnji z sowter trafoti,niti da ne razbijam promija...

http://www.sowter.co.uk/pre-amp-line-am ... ormers.php

ali pri angležih

http://www.hificollective.co.uk/kits/gl ... ehome.html

softspeaker
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Posts: 2115
Joined: 11 Mar 2009, 09:45
Location: Brezno (Abyss)

Re: TVC predojačevalci

Postby softspeaker » 29 Jun 2009, 17:47

Zelo zanimivo!
In katere končne stopnje ste sprobali na njih in s katerimi aktivnimi predojačevalci si jih primerjal?
Sem mislil da so TVC-ji manj občutljivi na te impedance, kot navadnih pasivni predojačevalci...

andrej
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Posts: 61
Joined: 12 Mar 2009, 00:38

Re: TVC predojačevalci

Postby andrej » 29 Jun 2009, 18:08

pri meni sony cdp 55 es (izhodne impedance naj bi imel 50kohmov! mogoče je tle kakšen trik?) in končna tudi 55 ES

pri lastniku preampa je bilo priklopljeno na sistem genelec sub + sat

pri tretjemu kolegu na 300B HL monobloke

primerjal sem jih z Oakleyem (ECC 83) in HL reference preamp (ne vem katere lampe je imel).

softspeaker
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Posts: 2115
Joined: 11 Mar 2009, 09:45
Location: Brezno (Abyss)

Re: TVC predojačevalci

Postby softspeaker » 08 Oct 2012, 15:26

Slagle Autoformer Volume Control Modules (AVC) - zelo zanimivo, tudi njihov forum!

http://www.enjoythemusic.com/diy/0611/s ... odules.htm


Sonic Impressions
The Slagle modules were asked to compete against expensive line stages in the context of a serious high-end system. The front end consisted of the Weiss Engineering Jason transport and updated Medea DAC. The Volent VL-2 SE loudspeakers were used for most of the listening tests together with a variety of power amps. I should add that these speakers feature fabulous clarity and are extremely revealing of front-end and amplifier sonic differences. To set the stage for the first listening impressions, the petite modules were directly driving the Lamm Audio M1.2 Reference monoblocks; as simple as it gets. What a surprise! There was magic in the air! Absolutely spectacular textural sweetness and purity – as if layers of electronic haze were being washed away. By contrast, resistive volume controls were made to sound grainy. Image outlines were full-bodied as if on steroids and soundstage depth perspective was well fleshed out. Dynamic nuances that previously lay dormant in the fabric of the music were resurrected with conviction. In general, the ebb and flow of musical lines appeared to be dramatically enhanced. What a first impression!

Later listening sessions did nothing to diminish my initial enthusiasm. Transient clarity and speed were consistently strong suites. Struck cymbals decayed with startling filigree and clarity. Blessed by a ridiculously low noise floor, no low-level detail was obscured. Flawless reproduction of ambient clues resulted in a believable spatial impression, and this with no less than solids-state amplification. Bass lines were well defined with no apparent loss of slam. If you're waiting for if or buts, some form of qualification, there really isn't anything major to report on. I could quibble about the lack of super fine volume control or the fact that primary inductance was only matched within 10% between modules, but I'm not going to. After all, if this is the Mona Lisa of volume controls; it would be undignified to look for zits in the face of perfection.

Conclusion
The sonic benefits of the Slagle AVC accrue from the elimination of an unnecessary electronic gain stage and replacement of resistive attenuation from the signal path. Bottom line: a superb volume control and the best $350 investment in audio!

http://www.intactaudio.com/atten.html

http://www.intactaudio.com/forum/

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