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Old 5th October 2010, 10:54 AM   #1
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Exclamation Whic Chip is better? LM3886T or TDA7293v

I want to build an amplifier for home. I shortlisted two chips LM3886T and TDA7293v/94/95. Can any one tell me which chip has better sound quality? their advantages and drawbacks?

Also if you have any idea about "NATIONAL SEMICONDUCTOR - LM4780TA"


Last edited by diptangshu; 5th October 2010 at 10:57 AM.
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Old 5th October 2010, 11:32 AM   #2
AndrewT is online now AndrewT  Scotland
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which chip has better support from the Manufacturer and from other sources, eg our Forum?

At first stage I would want a working amplifier and learn from there, rather than a non working amplifier and lose heart and give up.
regards Andrew T.
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Old 5th October 2010, 11:57 AM   #3
Roushon is offline Roushon  India
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Default LM3886...

LM3886T as I built it and is very good. I have no idea about the other ones.

S. Roushon
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Old 5th October 2010, 12:21 PM   #4
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I built the LM3886T to replace my Levinson 338 when it went for a service. OK it's not as good as the Levinson but it was acceptable even to my tuned ears.
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Old 5th October 2010, 12:48 PM   #5
pjp is offline pjp  India
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These two ICs have been debated endlessly already. Did you search the forum ?

My personal opinion is you will not be able to hear the difference.

Last edited by pjp; 5th October 2010 at 12:51 PM.
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Old 5th October 2010, 01:24 PM   #6
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Default Difference between chips

The 7293v is DMOS, with MOSFET outputs. The 3886 is friendly for experimenters and DIYers, and you may want to search for the differences in protection systems. DMOS works well with high NFB current and heat.

The 3886 has Darlington outputs. Possibly, the 3886 handles lower impedances better. The 7294 I use has good 16 ohm power, and generally has flawless sound all around.

I have not tried the 3886, but from what I know of MOSFETS and the 7294, manufacturers aren't quite as confident with them.

One could Google or search online for opinions about the two-Darlingtons or DMOS.

Last edited by epitaxial; 5th October 2010 at 01:37 PM. Reason: Add more
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Old 5th October 2010, 01:36 PM   #7
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TDA7293 has lower quiescent, can be paralleled very easily for higher power, runs at higher voltages and clips more cleanly without need of a zobel. It does though need a bootstrap cap. LM3886 has the option of an isolated package and needs fewer pins to hook up to so fewer components in application. I wouldn't say that I would be able to tell the difference in sound quality, they both sound great to my ears. That is until you hit clipping, when the LM3886 can sound a bit rough.
The heart ... first dictates the conclusion, then commands the head to provide the reasoning that will defend it. Anthony de Mello
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Old 5th October 2010, 02:01 PM   #8
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The LM4780TA is a pair of LM3886's in one package (IE 2 channels instead of 1).
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Old 5th October 2010, 02:39 PM   #9
Ar4 is offline Ar4  Latvia
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I made LM4780 chipamp with P2P technique, and it sounds good, no noise without signal, clear sound, cant complain about anything. Just use Rs for input, and use proper grounding.
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Old 6th October 2010, 12:00 AM   #10
jamal is offline jamal  Singapore
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My branded PC speakers come with 3 TDA 7296 and teroidal transformer inside.
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