Maybe a little of both?

Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

In Reply to: Class A SS or chip amp tda2040 posted by rcollege on October 22, 2010 at 01:02:17:

Regarding gain clone type amps, see this thread:
http://db.audioasylum.com/cgi/m.mpl?forum=tweaks&n=148236&highlight=1875

Having since heard what was supposed to be a "hot" little LM3886 based amp, I still think the LM1875 sounds pretty decent, more "tubelike" if you will.

However, I never did hear the LM3886 with the power supply rail pull-down trick, where you load the output to the negative rail through either a current source or a simple load resistor, and "force" a modicum of Class A operation instead of full-blown push-pull flip-flopping. This might help quite a bit, and make the difference. If so, it would be a formidable sounding amp then.

Jon Risch

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Follow Ups Full Thread

Topic - Class A SS or chip amp tda2040 - rcollege 01:02:17 10/22/10 (8)

RE: Class A SS or chip amp tda2040 - rcollege 01:24:25 11/30/10 (0)

RE: Class A SS or chip amp tda2040 - Johnny2Bad 16:25:04 11/18/10 (0)

I'd go chip - Owen 08:50:56 11/15/10 (0)

Maybe a little of both? - Jon Risch 19:39:38 10/25/10 (0)

I was successful with Class A - rcollege 23:10:15 10/24/10 (0)

Class A single-ended requires a transformer or coupling capacitor. - Al Sekela 15:15:28 10/22/10 (2)

Really? - Ric Schultz 16:35:07 10/22/10 (1)

Thanks. I did not know this had been done. - Al Sekela 15:04:55 10/23/10 (0)

Follow Ups

Maybe a little of both? - Jon Risch 19:39:38 10/25/10 (0)

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