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In Reply to: RE: Purifi Based Amps posted by MarcL on September 11, 2020 at 07:02:07
@MarcL,All of the boutique opamp input buffer versions that ASR has measured to date have measured less clean than Purifi's EVAL1 input buffer.
The EVAL1 measures 3dB better without pre-gain than with pre-gain so if any improvements are to be had, would be have pregain without the 3dB loss in SINAD. So far, I haven't seen anyone achieve that.
These boutique opamps appear to be expensive tone controls (which can be done elsewhere).
VTV just posted a tube based input buffer version for a significant price increase (+ $1,250). I understand they are a tube company, but don't see the value add other than marketing.
The only possible "value add" that I have seen is a micro-controller version from Vera Audio that allows bridging of both the NC500 and Purifi modules but they aren't cheap.
https://www.vera-audio.com/newsarticle.php?news_id=3
Edits: 09/11/20 09/11/20Follow Ups:
Someday someone will offer a vinyl input buffer that cuts a vinyl master and plays it back into the amp in real time for that "pure analog" fidelity :-)
Agilist, Musician, Photographer, Audiophile
Magneplanar: 3.7, CC5, MC1, DWM; Outlaw: UltraX12, LFM-1C; Emotiva: XMC-1, PA-1; Nord: Nord One NC500DM; Outlaw: Model 7500; OPPO 205
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