Reccomended Schems + Sub

[rockgardenlove]

Hi, I'm kind of new to solid state power design, but have some other audio electronics background, as well as some tube experience. I am planning to build a pretty loud amplifier system for a wide range of music from folk to rock to reggae.
I was thinking of going with a chip amp for the stereo, and then discrete / tube for the preamp. Are there any well respected schematics that are known good that people like? Any links would be great.
I was also wondering as to the value of a subwoofer. Most of the stuff I listen to is rock and roll. Would a sub help? I'm interested in reproducing the music accurately, not getting crazy inappropriate amounts of bass. Thoughts?

Thanks

 

[johnYks]

Hello Rockgardenlove


After a lot of reading and thinking this is what I believe are the
most noteworthy projects amongst many from which you will
gain the most information - in no particular order.

Solid State Conventional Designs

Syn08 http://www.synaesthesia.ca/PGP.html
Graham Maynard The Gem http://gmweb2.net/
Roender http://www.diyaudio.com/forums/showthread.php?s=&threadid=111756
Nelson Pass http://www.passlabs.com/
Cordell Amp http://www.diyaudio.com/forums/showthread.php?s=&threadid=136341
Jan Didden http://www.linearaudio.nl/library-1.htm


Chip Amps or Class D

Peter Daniel http://www.audiosector.com/
Hypex http://www.hypex.nl/
Twisted Pear http://www.twistedpearaudio.com/amplifiers/sympatico.aspx
41hz Truepath http://www.41hz.com/
Sure Electronics http://www.diyaudio.com/forums/showthread.php?s=&threadid=112395


Valve Amps

Lynn Olson http://www.nutshellhifi.com/
Thorsten Loesch http://www.fortunecity.com/rivendell/xentar/1179/

If you are really ambitious http://www.diytriode.republika.pl/drugi_eng.htm

Yours Sincerely
John

 

[johnYks]

After a bit more thinking I have realised that
I have forgotten to mention Jonathan Carr (Lyra Connoisseur)
search the forum for his contributions - mostly as replies and comments.

AKSA Hugh Dean is also an excellent contributor and makes
note worthy products.

You need to read and think about things - for instance

http://www.fortunecity.com/rivendell/xentar/1179/theory/seamptheory/SEAmplifiertheory.html

http://www.nutshellhifi.com/triode1.html
http://www.nutshellhifi.com/triode2.html

http://www.nutshellhifi.com/library/tinyhistory1.html

 

[h_a]

Hi,

interesting choice of solid state amps. While I'm not sure that most people would agree with this list, they're all without doubt technically very interesting.

Oh and please don't forget that Ovidiu's designs (Syn08) are nearly impossible to build accurately, except with a lot of experience and original pcbs. Otherwise you won't meet his specs distortionwise.

I think there's currently a group buy for Roender's amp pcbs, however it's also not exactly a cheap beginner's project.

For Nelson Pass' work you better have a look at www.passdiy.com and www.firstwatt.com . PassLabs is his commercial site, no schematics there.

Bob Cordell's amp is also far from a beginner's project and involves understanding of the concept of error correction, where I can also point you to Jan Didden's Pax amp (where this topic is also covered) - see article in Elektor 4/2008.

Wether one wants to go for ClassA, ClassAB or Class D is a personal choice, however ClassD is due to its high efficiency mostly something for high power designs and also needs experience or ready-made pcbs.

Some additional suggestions:

Class AB:
The SymAsym-amp (quite popular) http://www.lf-pro.net/mbittner/Sym5_Webpage/symasym5.html
The Krill http://www.diyaudio.com/forums/showthread.php?s=&threadid=134619&highlight=

ClassA
Krell KSA-50 http://www.diyaudio.com/wiki/index.php?page=Building+guide

or take it easy and build one of the many kits or Erno Borbely http://www.borbelyaudio.com/

Have fun, Hannes