I would bet the opposite. I think SS has more air. AJ has more sparkle😉. Don't forget the missing ingredient, the speakers.
Last edited:
I would also add, that I tried the SS fets in the AJ circuit. Very similar, just cleaner. Maybe you like distortion.
I was comparing AJ to J2 (clones) yesterday on speakers with accuton drivers. As clean as you can go, j2 just don't have that extended top. If it is air or sparkle 🙂. Oh trust me, now I know smth about speakers... Apparently more than about amps 🙂))
Could it be that both answers are correct? 
Perhaps the SS fets have (had) some much variability that different individual devices or batches have significant differences in input capacitance and other essential parameters.
Perhaps the SS fets have (had) some much variability that different individual devices or batches have significant differences in input capacitance and other essential parameters.
I tried it in ACA, F6-MOSFETs/F6-SS and AJ, J2 clones. Same signature. And all people around were proffering MOSFETs.
Too many variables, as Ilquam says. Perhaps everyone thinks mosfets sound better, but they are a higher distorting part than SS, so perhaps folks like distortion. I do. You can play with sonic signature of these amps too much to do side by side comparison. Only way to know for sure is to build two amp using same circuit topology, equalized to same measurement specs, and then compare.
Some folks say Accuton are cold and clinical. Go figure.
Beauty of diy, build what you like and don't worry about it.
Some folks say Accuton are cold and clinical. Go figure.
Beauty of diy, build what you like and don't worry about it.
Last edited:
Yes, the masters 😎 skill makes me depressive…...😉
good that he distracts us from our (low) level with new amps……🙂
but that does not solve the problem really.
good that he distracts us from our (low) level with new amps……🙂
but that does not solve the problem really.
Buzz, don't be so defensive I like them all, just curious 🙂
Now my turn to be defensive 😛 :-D. I will load a truck full of my speakers someday and stop by beautiful Burlington, so you can see how they sound 🙂.
About accutons, I thought that way as well and heard many adjectives, but clean is clean. They are absolutely amazing. Even if you prefer other sound, they are still amazing 🙂
Generg, I got a better soundcard, so finally will measure something 🙂
Now my turn to be defensive 😛 :-D. I will load a truck full of my speakers someday and stop by beautiful Burlington, so you can see how they sound 🙂.
About accutons, I thought that way as well and heard many adjectives, but clean is clean. They are absolutely amazing. Even if you prefer other sound, they are still amazing 🙂
Generg, I got a better soundcard, so finally will measure something 🙂
If I came across as defensive, I did not mean to. One thing I have learned for sure is that there a vexing number of variables when building these things. Unless fully equipped with knowledge, gear, and experience, you always run into a wall eventually. i have found that just having well matched channels can greatly affect the overall sound. My new secret to success comes down to simple procedure. Couple beers, couple glasses of wine, or couple drinks, and they all sound wonderful
Glass of wine makes hi-fi hi-end, indeed 🙂
(I need your help how to orient those boards, traces up or down? will email you)
(I need your help how to orient those boards, traces up or down? will email you)
I'm finally able to fire up (yeah, hopefully not literally!) a single channel tomorrow, but can only find 71W bulbs, not 100W as I've seen mentioned for the light bulb test...is that okay?
Iq = quiescent current, basically just the bias current. What ZM means is that it's ok because you use the bulb-tester with no bias as you start the amp for the first time with all of the bias turned off.
