[sdiy] Coolaudio VCAs: V2162 noisier than V2164?

Ove Ridé nitro2k01 at gmail.com
Mon Dec 21 18:39:01 CET 2015


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On 21 December 2015 at 18:19, Dave Magnuson <abide at dmdrafting.com> wrote:
> VIRUS WARNING
>
>
>
> Hi List,  I just got a “threat ware” virus from the History of Recording
> link in Chris’ signature.   I was looking at the history of Trident Consoles
> and got nailed
>
>
>
> BEWARE
>
>
>
> Dave Magnuson
>
>
>
> From: Synth-diy [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of
> Chris Juried
> Sent: Monday, December 21, 2015 11:41 AM
> To: Mattias Rickardsson; synthdiy diy
> Subject: Re: [sdiy] Coolaudio VCAs: V2162 noisier than V2164?
>
>
>
> Hi Mattias,
>
>
>
> What instrument(s) are you using for you SNR measurements?
>
>
>
> Sincerely,
>
>
> Chris Juried
> Audio Engineering Society (AES) Member
> InfoComm-Recognized AV Technologist
> http://www.JuriedEngineering.com (Juried Engineering, LLC.)
> http://www.TubeEquipment.com (Tube Equipment Corporation)
> http://www.HistoryOfRecording.com (History of Recording)
>
>
>
>
>
> ________________________________
>
> From: Mattias Rickardsson <mr at analogue.org>
> To: synthdiy diy <synth-diy at dropmix.xs4all.nl>
> Sent: Monday, December 21, 2015 10:21 AM
> Subject: [sdiy] Coolaudio VCAs: V2162 noisier than V2164?
>
>
> Hi there VCA lovers,
>
> I've done some measurements of SNR & THD of the 2164 and 2162 VCA ICs
> from Coolaudio, and I'm very surprised with the noise results I'm
> getting. With the 2162 I cannot reach a SNR over 95 dB before
> clipping, at any gain. With the 2164 at gain=1 I reach 120 dB SNR.
> That's a huge difference!
>
> When trimmed properly the 2162 does have slightly better THD, but the
> noise seems to always be there in the background. I hope my
> measurements are correct... the "-97 dBV" noise spec in the V2164
> datasheet seems a bit odd to me compared to the "-94 dBu" in the V2164
> dataheet - or I've misunderstood them.
>
> Has anyone else tried the 2162 (either from THAT or from Coolaudio)
> and compared it to the 2164 or other VCAs?
>
> /mr
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-- 
/Ove

Blog: <http://blog.gg8.se/>

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