RE: Class A SS or chip amp tda2040

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

Thanks everyone again for your responses.
I admit the lm1875 chip sounded very good...when I wired it all up. Funny, though...the single supply version sounds more musical than the split supply.
The TDA 2040 sounds accurate and quite clear if not too bright.

So an update...I've been going full speed...I have tried different mosfets with the class A design. I'm to the point of creating a class a using a single BJT or Darlington. In my experimentations I did a BJT with very little amplification...so it needs more biasing. What I did find "cool" was how little heat was produced with it. So if I'm correct, I'll have a decent class a amp with manageable heat.
I've been using a spice program...so we'll see.

Are there any circuits for the lm 1875, tda 2030 that are different than the data sheet schematic?
One thing I have to admit is that I kinda feel the rediculous notion that making a chip amp is kind of cheating...especially when I see the block diagram of what is in the lm1875...good lord its a lot. I almost feel that I'll stick to my vintage Marantz...I want simpler sound, without the complexity of several transistors. A couple more stabs at the Class A then if that don't work...I'll go chip.

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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

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

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