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Old 22nd July 2008, 02:46 AM   #1
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Question Amp modules

Hi all,

I'm new to this forum.

Is there a list of amp modules or designs that are available. I was hoping for a sort of an index thread.

My expertise lies in speakers but I have built a few amps in my earlier days. Now my eyesight limits me to using prebuilt moduls and I want to build something big.
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Old 22nd July 2008, 03:52 AM   #2
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hi mate .ive built and can offer my impressions of the following amp modules
greg ball ska gb300 .easy to build and doesnt need a massive powersupply or big heatsinks as its very efficient ,its a little finicky with setting the bias however . but once set its fine .its the most natural and best sounding amp ive built,its also the best value for money ,just watch your heatsink size as if its not just right you will cook it .
aussie amps nxlsp400..great amp and is very rugged it does require big heatsinks and powersupply,s to work though.bias is rock solid once set .its a very revealing but at times a little too digital sounding .it comes with both ballanced and unballanced inputs and loudspeaker protection as standard
aussie amps nx400 synergy..good modules and nice sound .somewhat in between the above two,in sound qaulity .easy to bias and hook up .
aussie amps nvx200 ..im about too build and will have some listening impressions soon .i hope the above is of some help cheers
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Old 22nd July 2008, 03:57 AM   #3
lineup is offline lineup  Sweden
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In the
Chip Amps forum
you will find projects using LM3875, LM1875 and LM3886.
These are very good power amplifiers in a Module IC, integrated circuit.

They have some pins to connect to input/output and power.
The popular name for these easy to build amplifiers
is Gainclones
You need to put them onto heatsinks, make a power supply
and add a few resistors / capacitors.

In every forum you will find a STICKY TOPIC: Favorite Threads and Posts in .......
So also in Chip Amps forum:
Permanent: Favorite Threads and Posts in "Chip Amps"
Chip Amps forum is here:
http://www.diyaudio.com/forums/forum...php?forumid=40

I suggest you start with looking into favourite topics.
Then you can make a new topic in that 'Chip Amps' forum, for your project.
They will answer any questions you may have, as you move along.


Regards Lineup
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Old 22nd July 2008, 02:07 PM   #4
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Thanks guys,

I'm after something more than what a gain clone can do. I intend to replace the amps I have now. Yamaha M70, Yamaha M80 and 2 Carver M400.

A new speaker project that is in the design stage will require three amps per channel plus centre and rears plus 2 subs. That's 12 channels!

Can't find gb300 in the list of members, what name did he use for the amp.

Thanks for the help.
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Old 22nd July 2008, 04:30 PM   #5
DcibeL is offline DcibeL  Canada
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Quote:
Originally posted by pheonix358
Can't find gb300 in the list of members, what name did he use for the amp.
SKA Amplifier modules
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Old 22nd July 2008, 06:27 PM   #6
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Quote:
Originally posted by pheonix358
three amps per channel plus centre and rears plus 2 subs. That's 12 channels!
Reads like you'd be better off with Mr Greg Baila's GB150D instead of the biggy 300, maybe even for the subwoofers.
The GB150d is a pretty little amp that's surprisingly good for it's size and cost and you can derate it to a 50W output level.
More sensible imo for a 12 channel setup, for 50W/8 in AB you can even skip half the number of output devices.
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Old 22nd July 2008, 06:58 PM   #7
lineup is offline lineup  Sweden
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Quote:
Originally posted by pheonix358
Thanks guys,
I'm after something more than what a gainclone can do.

Besides AKSA, Aussieamplifiers and Greg Ball SKA
you can also have a look at ACD, a member from Denmark, Lynx power amplifier.

You may be inerested in a HYBRIDE Class A amplifier by G Kleinschmidt.
The Kleinschmidt 10A
It is called K10A
A hybrid 10W class A amplifier with a 12AX7 twin triode input stage.

Click the image to open in full size.

- You also have SymaSym well documented with PCB
http://www.lf-pro.net/mbittner/Sym5_.../symasym5.html

- And do not forget Quasi several good Power Amplifiers at his site.
Good documentation and amplifiers for different levels of WATT
http://www.adam.com.au/cgpap/QuasiWeb/index.htm

The LYNX Power Amplifier, Denmark
http://www.audio-circuit.dk/LYNX_main.html

Australian links:

AKSA
http://www.aksaonline.com/products/products.html

AussieAmplifiers Modules
http://www.aussieamplifiers.com/products.htm
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Old 25th July 2008, 12:54 AM   #8
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Thanks for all that help. I am looking at Greg's GB150D. Price is good as is power and quality. It helps that he provides them fully built since my eyes are no longer compatable with electronics.

Thanks again to all those that responded.
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Old 25th July 2008, 02:14 AM   #9
lineup is offline lineup  Sweden
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Quote:
Originally posted by pheonix358
Thanks for all that help. I am looking at Greg's GB150D.
Price is good as is power and quality.
It helps that he provides them fully built since my eyes are no longer compatable with electronics.

Thanks again to all those that responded.
By the way,
I liked it when Greg 'GB150' Ball was at this forum
(according to moderators he broke the forum rules and was banned)


Greg's moniker was amplifierguru
His profile:
http://www.diyaudio.com/forums/membe...o&userid=21796
All His posts:
http://www.diyaudio.com/forums/searc...r&userid=21796




Lineup regards
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Old 25th July 2008, 09:49 AM   #10
Rob_S is offline Rob_S  United Kingdom
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There is also construction threads on Greg's forum with some newer changes in that improve things a little (and Greg provides a build guide).

http://www.ska-audio.com/Forum/YaBB.pl

Agree it would be good to have Greg back here

Cheers
Rob
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