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Chip Amps Amplifiers based on integrated circuits

TDA1514a amp
TDA1514a amp
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Old 5th January 2004, 06:36 PM   #1
jez is offline jez  United Kingdom
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Default TDA1514a amp

Now that I know what a "gainclone" is (tacky name!) I can tell people of my own experiances of building some several years ago.
I used the TDA 1514A to build one for a friend and one for myself,
they were built directly onto the heatsink with all earths going directly to the sink via solder tags and self tapers to give super direct earthing and other components directly between the pins of the chips and ran at a rather high +30 & -30 volts. The results ?, stunning!, one of the best amps I have ever heard at any price, later versions I built using more normal construction methods and much bigger supplies failed to deliver, they sounded slightly thin and leaden but still better than many budget amps.
As this chip is no longer made can any members tell mehow they think the National LM series compares to the philips chip. I have used the LM's at work for public address amps but never tried them (yet!) for HI-FI.

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Old 7th January 2004, 06:23 PM   #2
Bozzz is offline Bozzz  Netherlands
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Hi Jez,

No first hand experience but from the datasheets it looks like the lm series have much better PSRR and somewhat better S/N ratios than the tda1514a. It's difficult to make a good comparison because of the differences in testing methods and also the philips datasheet is pretty summary.

Hope this helps
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Old 7th January 2004, 08:01 PM   #3
jez is offline jez  United Kingdom
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I have the data sheets and yes the philips one is a bit short on detail.
It was more the subjective quality of the amps that I was wondering about, they all have pretty decent specs.
Think I'll do another search....

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Old 7th January 2004, 10:15 PM   #4
dhaen is offline dhaen  Europe
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Here's my say..
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Old 16th April 2006, 01:08 PM   #5
Primoz is offline Primoz  Slovenia
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I have somewhere two pieces of TDA1514A. I would like to know if I should use bootstrap or not. What would give better sound?



Do you think LM3876 or LM3875 is better than TDA1514A? Has anyone tried both?
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Old 17th April 2006, 08:19 PM   #6
cpemma is offline cpemma  United Kingdom
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I built a couple of the Maplin 1514A kits donkey's years ago, very nice amp from the bit of testing I did but since only used in a PA system with limited range outdoor speakers. I'm going to try some Gaincloney techniques on it (shorter paths, better caps), see how it goes as a house amp.

Interestingly, Maplin were saying then (1990) the 2000uF per rail on-board smoothing provided was adequate for a rectified-only supply. And they weren't even the ubiquitous Pano FC...
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