That1580 mini mixer

Where we discuss new analog design ideas for Pro Audio and modern spins on vintage ones.
weroflu
Posts: 54
Joined: Wed Apr 19, 2017 9:19 am

Re: That1580 mini mixer

Post by weroflu »

Yes I looked at the 626x a few times. Most recently I didn't like the low-ish gain, no servo and, worse distortion figures on the preamp than the 1580. Thinking about it now, I could fit 2 470uF 10v cg's on a preamp card since I would only need 2 or 3 cards, 39/34 db gain is probably ok, but maybe with some dynamics mics maybe not. Distortion figures, not sure if that's audible, but I do really like the lme49720 op amps and probably because of their low distortion.

I was almost going to post a few weeks ago and ask you about how to do a differential servo for it.
User avatar
mediatechnology
Posts: 5116
Joined: Sat Aug 11, 2007 2:34 pm
Location: Oak Cliff, Texas
Contact:

Re: That1580 mini mixer

Post by mediatechnology »

It looks like you'd have to servo into the input bases since one emitter has Rg in series.
User avatar
mediatechnology
Posts: 5116
Joined: Sat Aug 11, 2007 2:34 pm
Location: Oak Cliff, Texas
Contact:

Re: That1580 mini mixer

Post by mediatechnology »

I think this may be relevant:

"Analog And Digital Gain In Microphone Preamplifier Design," Fink And Bortoni, THAT Corporation, Presented at the 153rd Convention
2022 October.

https://proaudiodesignforum.com/images/ ... T_Corp.pdf
Post Reply