Well, I'm still researching a first DIY amp project. I've already researched gainclones and various A/B amps like the Eliot 03A and AKSA. The sound quality of Class A amps has always interested me so now it's time to look at these.
For simplicity and low cost I'd build a lower-power one though -- Zen, Aleph, JLC, Hiraga, Sugden, etc. I don't need the power for my system, either. Please comment on sound quality, ease of build, etc. I'd want the amp to be tight in the bass so I'm still uncertain about the Zen's and Alephs but, of course, I'm only going on what I've read since I've never heard them. I'd need circuit boards but I don't know of a source of JLC, Sugden or Hiraga boards, for example, and I don't know if having custom boards built is costly or not.
For simplicity and low cost I'd build a lower-power one though -- Zen, Aleph, JLC, Hiraga, Sugden, etc. I don't need the power for my system, either. Please comment on sound quality, ease of build, etc. I'd want the amp to be tight in the bass so I'm still uncertain about the Zen's and Alephs but, of course, I'm only going on what I've read since I've never heard them. I'd need circuit boards but I don't know of a source of JLC, Sugden or Hiraga boards, for example, and I don't know if having custom boards built is costly or not.
Hi Greg7,
I'll be direct im my recommendation, based om amps I'v build in the past.
If you want tight bass, low power, class A & simple circuit, build the LE MONSTRE.
The best thing about this amp is the BASS controle!
But be shure to use the original parts, no subtitute parts.
All the best!
Audiofanatic 😉
I'll be direct im my recommendation, based om amps I'v build in the past.
If you want tight bass, low power, class A & simple circuit, build the LE MONSTRE.
The best thing about this amp is the BASS controle!
But be shure to use the original parts, no subtitute parts.
All the best!
Audiofanatic 😉
where are the LE MONSTRE.
i get intrested in the LE MONSTRE, where are the full shematic? any URL or posted to me.
Actually I have been design my own class A amp and really get inpressed of the accuarate sound. The problem... yeah it really hot and humming. Yes the current really get drain here..
i get intrested in the LE MONSTRE, where are the full shematic? any URL or posted to me.
Actually I have been design my own class A amp and really get inpressed of the accuarate sound. The problem... yeah it really hot and humming. Yes the current really get drain here..
Schematics are here : http://www.gmweb.btinternet.co.uk/hiraga.htm
Other designs from Passlabs : PassDIY
Some push/pull-class a designs : http://perso.wanadoo.fr/jm.plantefeve/sche.html
Jens
Other designs from Passlabs : PassDIY
Some push/pull-class a designs : http://perso.wanadoo.fr/jm.plantefeve/sche.html
Jens
Hey,
Here is the easiest thing I have ever seen.
http://www.vt52.com/diy/diypage/aren/fet/aren.html
Tomo
Here is the easiest thing I have ever seen.
http://www.vt52.com/diy/diypage/aren/fet/aren.html
Tomo
Tomo said:
An externally hosted image should be here but it was not working when we last tested it.
That amp has always facinated me, but i wonder if one could come up with a little more elegant driver stage than 3 invertors (i'm not even quite sure what those are) in series?
dave
Those are CMOS inverters, biased into linear operation. Quirky but unlikely to be hi-fi.planet10 said:
I don't think the cct is complete. There is nothing to set the bias point of the fet. If you do make it up, use 4069UB (unbuffered) inverters that only have a single stage internally. CMOS inverters will swing rail to rail BTW. Probably pretty fast too. Not sure about the noise figure though.
single ended
My own design not using single ended. Input pair with a current mirror source. At power transistor stage I use a quasi PNP bjt type. Each power bjt run at 1.25A. Major problem face is the it hot another is a litle hum of 50Hz supply. To eleminate the hum I have read about using a regulated supply and it seems to be costly here. Another thing using a chock.
I wonder if the single ended better then push pull type? I heard that the THD is higher due to the usage of output capacitor!
My own design not using single ended. Input pair with a current mirror source. At power transistor stage I use a quasi PNP bjt type. Each power bjt run at 1.25A. Major problem face is the it hot another is a litle hum of 50Hz supply. To eleminate the hum I have read about using a regulated supply and it seems to be costly here. Another thing using a chock.
I wonder if the single ended better then push pull type? I heard that the THD is higher due to the usage of output capacitor!
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