Lack of air and volume as an indicator of crossover distortions

[Wavebourn]

Hi Milan,
did you check email?

 

[moamps]

Hi Anatoliy:

I sent you the files you requested. They're copyrigh-protected so please do not distribute or use the them for commercial and public purposes. Hope your inbox is big enough.

Regards,
Milan

 

[Wavebourn]

Hi Anatoliy:

I sent you the files you requested. They're copyrigh-protected so please do not distribute or use the them for commercial and public purposes. Hope your inbox is big enough.

Regards,
Milan

Thanks!

Mine are there, for comparision:

http://wavebourn.com/consoles

Also, instead of replacing opamps in TOA and similar consoles I bias outputs by 2 mA current.

Most audible differences are when I whisper and vary distance to the microphone. Biased 4558 shows more "microphone sensitivity distance", it means lower crossover distortions, or higher limiting distortions, but limiting distortions are not visible at all on the oscilloscope (they would not, because with deep feedback transfer function is very straight and sharp on clipping).

By the way, 4558 is dual old good 741. Noisy, but when biased for class A it sounds brilliant.

 

[dimitri]

4558 is dual old good 741