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Old 17th October 2012, 05:56 PM   #1
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Default Suggestions on first build 100-200W

Hi Guys,

I'm contemplating on weather i should try my hands at building an audiophile amplifier.

The idea came from reviving an old passion of designing and building loudspeakers. But then life happened, career, pretty girl, kids, you know the drill. Ten years later i'm looking to get back in the game and i'm happy to be se that old friends such as the Scan Speak 8545 are still kicking it and lots of newcomes have arrived.

Anyway, I gifted away my Holfi stereo to my sister and have absolutely nothing that would be remotely useful to design a pair of three ways on (read JVC/Bose Cube).

Being a married guy with kids my funds are generally earmarked so cost is an object. While I was browsing some fairly modest stuff like Arcam, Creek, Naim and Cambridge Audio I saw some Naim Nac42/NAP145 Clone PCB's witch got me thinking. What if I built my own amp?

I have started to look into PCB etching and glossing through the build pages on this site has really lit my interest.

Now, What do you guys suggest? Is it realisticly possible to design a high quality integrated without alot of experience or should i just buy that Arcam and save the amp tinkering for later?

If possible, do you suggest that I start with a clone as mentioned above or design something from scratch up?

Thanks Alot

J
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Old 17th October 2012, 11:04 PM   #2
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anyone...?
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Old 17th October 2012, 11:20 PM   #3
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If you want to do it for the enjoyment, learning,
and satisfaction, that's fine. But for bang for the
buck, you can buy a retail amp for less than you
would pay for the parts for a homebrew equivalent.
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Old 17th October 2012, 11:22 PM   #4
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Quote:
Originally Posted by hitsware View Post
If you want to do it for the enjoyment, learning,
and satisfaction, that's fine. But for bang for the
buck, you can buy a retail amp for less than you
would pay for the parts for a homebrew equivalent.

Ok, thanks.
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Old 18th October 2012, 12:04 AM   #5
sreten is offline sreten  United Kingdom
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Location: Brighton UK
Hi,

Do not remotely attempt to design a high quality amplifier from scratch
without poring over all the designs out there for several decades. That
will take a long time. If you think you can without research, you can't.

Nowadays you simply cannot build any sort of high quality amplifier for
remotely the cost of a used equivalent, except for the very high end.

Quality is not having 100W to 200W per channel.

For example, this typically around 80 (in the UK) used amplifier will
trash anything that is not carefully and properly designed for very
high sound quality, its my favourite budget amplifier, Pioneer A-300X :

Click the image to open in full size.

Really superb build quality for the budget price and vs DIY.

Work out how much it would cost to build anything remotely similar.

Careful used amplifier research is the best bet.

rgds, sreten.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

Last edited by sreten; 18th October 2012 at 12:19 AM.
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Old 18th October 2012, 12:08 AM   #6
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Ok, thanks for the reality check.
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Old 18th October 2012, 01:39 PM   #7
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How about starting with an existing circuit such as these?

Naim NAC42 5 Clone Preamplifier Single Ended Pre Amp Kit 1pc D4 | eBay

Nap 140 Classic Naim Clone Mono Audio Power Amplifier Kit with Sanken Transistor | eBay
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