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Chip Amps Amplifiers based on integrated circuits

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Old 29th March 2017, 02:42 PM   #1
Mixi is offline Mixi  Austria
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Default Building my first amp

Hi!

I'm new to this forum and I'm looking for some advice for my first diy amp project.

I've spent quite some time reading through posts on this forum and some other websites and it appears that chipamps are among the easiest diy amp projects. So here's my first question: Am I right about this or are there other (easier) projects that you'd recommend?

I am currently using a rather basic setup with a Pro-ject turntable a denon 510ae amp ad some phonar 3-way speakers.

The kit I'm looking at is the LM3875 kit from audiosector. Will that be an improvement over my current denon amp? The speakers I use are rated with a sensitivity of 89db.

I'd also like to add that I live in Austria so our mains voltage is 230V - just to be taken into consideration when I start asking questions about building the PSU :-)

Many thanks in advance! Looking forward to your comments!
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Old 29th March 2017, 03:23 PM   #2
AndrewT is offline AndrewT  Scotland
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I would say you are right, fewest components to solder/wire in means least complicated.
Audiosector is a specialised version of the chipamp and I do not recommend it to Beginners.
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Old 29th March 2017, 04:20 PM   #3
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I would recommend Neurochrome's LM3886DR along with their excellent switching supply design. Their linear supply design is also excellent for higher power with the same circuit.

https://www.neurochrome.com/lm3886-done-right/

The designer's documentation, expertise, and consumer service is one of the best I have experienced.

Best,
Anand.

Last edited by nycavsr2000; 29th March 2017 at 04:22 PM.
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Old 29th March 2017, 04:53 PM   #4
Mixi is offline Mixi  Austria
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great, thanks for your replies.

may i ask why you don't recommend the audiosector kit to beginners? is it harder to build, more difficult to find the right speakers for it...?

thank you for recommending Neurocrome's kit. It really looks "plug 'n play" :-). any ideas or comments on how such a kit would compare to an amp like the denon 510 ae i mentioned?

thank you!
michi
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Old 29th March 2017, 05:09 PM   #5
Mooly is offline Mooly  United Kingdom
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The Audiosector design is to minimalist to be guaranteed usable under all circumstances.

It omits parts needed to ensure complete stability under all usage conditions, and it also has the potential (literally) to destroy your speakers unless you appreciate those compromises and how to work around them.
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Old 29th March 2017, 05:19 PM   #6
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Buy something single supply with a speaker capacitor. There are designs for LM1875/3875 both ways, but the boards pick split supply or single supply.
That way if you make a soldering mistake you don't have to buy a new speaker. Whatever, try out with throwaway speakers, to make sure no wire pops loose in the first weeks.
If you buy a circuit board, chip amp may be easier. I build point to point, and my 6 transistor AX6 worked better when wired correctly, than my LM1875, which oscillates. http://www.diyaudio.com/forums/solid...supply-20.html
It is easier to keep the input wires away from the output wires with bigger parts.
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Last edited by indianajo; 29th March 2017 at 05:25 PM.
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Old 29th March 2017, 06:08 PM   #7
Bare is offline Bare  Canada
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As possible digression:
Your Denon is a reasonable amp. A Chip amp may or may not equal it's performance
Suggest you Look at building a pass design Amp (pass diy forum above) Surprisingly Simple builds and by anybody's yardstick Excellent sounding.
A genuine worth the effort result
No blow up your speakers nonsense either
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Old 30th March 2017, 08:36 AM   #8
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Have another look at the speaker crossover and reconnoiter what a BSC can do for it and the amplifier that you already own.
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Old 30th March 2017, 11:10 AM   #9
JMFahey is offline JMFahey  Argentina
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Quote:
Originally Posted by AndrewT View Post
I would say you are right, fewest components to solder/wire in means least complicated.
Audiosector is a specialised version of the chipamp and I do not recommend it to Beginners.
Just curious what "beginner trouble" you envision in a 2 chipamp 8 resistors plus a couple capacitors and a PCB kit
DIY Chip Amplifier Kits, PCB's, Components and Information.
Click the image to open in full size.

Is there anything simpler?
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Old 30th March 2017, 01:26 PM   #10
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by Mooly View Post
The Audiosector design is to minimalist to be guaranteed usable under all circumstances.

It omits parts needed to ensure complete stability under all usage conditions, and it also has the potential (literally) to destroy your speakers unless you appreciate those compromises and how to work around them.
Quote:
Originally Posted by JMFahey View Post
Just curious what "beginner trouble" you envision in a 2 chipamp 8 resistors plus a couple capacitors and a PCB kit
DIY Chip Amplifier Kits, PCB's, Components and Information.
Click the image to open in full size.

Is there anything simpler?
Mooly has given a fair response.

If I were to add in my whole thoughts it would not be good reading.
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