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Old 25th May 2003, 10:02 PM   #1
karma is offline karma  Canada
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Arrow tda7370

anyone played with this chip sounds not to bad i have 2 up and running. i have a string of em. are thay worth playing with?


http://www.angliac.co.uk/st/data_from_st/1503.pdf
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Old 27th April 2014, 03:01 PM   #2
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Hello,

Sorry for the thread necro, but I was wondering what you did with the TDA7370 amps you made? I have been messing about with one of these - two bridged channels as per the manufacturers datasheet, running from a 13.8 volt benchtop PSU. It sounds nice for vocals & up, but there is bugger all bass from it. Is this a characteristic of the chip?

I have now got the bug to make a 'nice' amp for myself, something like 50 watts per channel (2 channels) in to 6 or 8 ohm speakers - have you any experience here?

Thanks in advance,

David.
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Old 27th April 2014, 05:44 PM   #3
Mihkus is offline Mihkus  Estonia
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50W is impossible from 13,8v
BTL 4W at 4R with THD 0,03 but I think thats really good for car chipamp.
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Old 27th April 2014, 06:30 PM   #4
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i don't see where it was told he is going to attempt it from 13.8 volts.
anyways, lm3886 and the likes are Your friend.
and tda7293.
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Old 27th April 2014, 06:39 PM   #5
Mooly is offline Mooly  United Kingdom
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Quote:
Originally Posted by pastedavid View Post
It sounds nice for vocals & up, but there is bugger all bass from it. Is this a characteristic of the chip?
Would that be a technical term ?

The chip goes down to DC so the only limitations on bass response are the values of the coupling caps, input and speaker.

Have you measured the output at lower frequencies ? A test CD would be good with equal level tones at say 400Hz (as a reference) and then lower frequencies of 40Hz and say 10Hz and 5Hz. Easy to make one using Audacity.

Speakers in phase course they are...
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Old 28th April 2014, 10:44 PM   #6
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Hi, I wasn't thinking of making anew amp based on a 13.8v circuit, that was just what I was playing with.

I am not the best-informed person in the world, so you'll have to forgive me any basic mistakes!

What I would like to end up with is an amp, and eventually a pair of speakers, which can play my favourite music (of the moment!) loud-ish but with clear vocals and a good, strong kick drum.

The particular tracks I am thinking about at the minute are by the band Muse, from their album The Resistance, particularly tracks 4 (United States of Eurasia) and 5 (Guiding Light) - they have almost lone vocals through to a big sound with drums & guitars, with some very bassy effects in the middle (actually the sound of jet engines!).

I hope this gets across the capability I am ultimately looking for, and I welcome any suggestions and pointers!

Thanks,

David.
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Old 28th April 2014, 10:46 PM   #7
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LM3886 and TDA7293, OK thanks! Do you have any opinion on which might be an easier build, or maybe one has a distinctly better sound, or are they both pretty much of a muchness?

Cheers!
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Old 28th April 2014, 10:47 PM   #8
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Quote:
Originally Posted by Mooly View Post
Would that be a technical term ?

Speakers in phase course they are...

Ah yeah, of course!

Thanks for the idea of the Audacity test CD, I will have a go at making one (Or I suppose I could just connect my laptop to the amp!)

Cheers!
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Old 29th April 2014, 06:58 AM   #9
Mooly is offline Mooly  United Kingdom
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Quote:
Originally Posted by pastedavid View Post
Ah yeah, of course!

Thanks for the idea of the Audacity test CD, I will have a go at making one (Or I suppose I could just connect my laptop to the amp!)

Cheers!
Yes you can. In fact I just remembered a thread I started on Audacity,
Installing and using Audacity. A get you started guide.

The LM3886 seems to be well liked generally and would probably be my choice if I were building a chip amp.
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Old 29th April 2014, 08:31 AM   #10
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The MyRef project is worth a looksee. But otherwise if you want it both loud and nice,see my parallel Tda7283 project
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