Mosfet A40

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#63
Hi Mike:

I wrote you offline a few days back asking about availability of PCB's, and got no answer back. Don't know therefore if mail was received; I was hoping you could tell me if you had PCB's available for this amp. Many thanks,

Chris
 
#68
Mike, others:

I am willing and capable to get another group of these boards built if there is interest. Is there? I want to order a qty. of ten, and certainly I would like a few myself, but I don't want all ten. Is there anyone else here who wants a board? Please let me know, I'll get them quoted; I work in a PCB contract manufacturing house and am well connected to fabs in the area.

Chris
 
#70
Hi Mike,
Can we ask Jam to give back all the things he learned here?

How about everyone else's contribution from the forum? This stuff didn't pop out from a vacuum.

In all fairness, that request is completely unreasonable. All due respect to Jam.

This is just my personal feeling on the subject (and a strong one at that).

-Chris
 
#72
Well, Since MIke graciously sent a MOSFET A-40 for the PASS Shootout I thought I'd JAM a question into this thread.....

How does one adjust X-1 potentiometer? Also wouldn't this be best replaced with a current source? I was told that resistors don't make good current sources.

Thanks!
 
#73
:cop:
I've pulled three OT posts and stuffed them into Texas, including one of mine.

MikeW,
This is not the thread to make those comments in. There is a Moderating thread. We had talked about these things off line.

:cop:

-Chris
 
#74
mpmarino said:


If you'd be willing to loan it out I'd like to give it a listen. Really and truly this time! My Chevy 2500 can cover the shipping.

Got yer email, thanks/

Marc
Click to expand...


Thanks for dropping by. It was nice to put a face with the posts. I hope you got that amp into the house OK. Let me know how you like it.
 
#75
What amp? What face? What are you talking about?

he he

I like it a lot. I like the bass. Tighter and more controlled than the 30 BUT the 30 has nicer mids IMHO. No replacement for SE it seems. There is no choice.. I must bi-amp🙂

I'm gonna build the Krell :devilr: (thank you very much) and compare midbass performance between the mos40 and the krell. Either way, just so you know, I'm certainly in for a couple mos40 boards if they come available.

Nice meeting you too...and thanks.
Marc
 
#78
Hi Mark,

There is no comparison. The Krell has that magical midrange that no other amp I've heard has atained. Enjoy building yours!
Click to expand...

I seem to remember reading you use Dynaudios - a.k.a. power vacuums. I've got to say that The A40 Mike let be borrow (I know he's built more than one) has very satisfying midbass With my '80s Infinity RS4b's. BUT...I'm really starting to not like that infinty dome mid, it sounds like a 'paper bag' the more I listen to it, and those poly woofers sound like they get heavier every day. I don't think the speakers are changing🙂 I need to stop gettin' sidetracked and work on my Tannoys.

Could it be that the A40 just doesn't do well with your Dyno's? I only ask because in my experience with D drivers is that they are fantastic with the right amp and not so fantastic with the wrong amp. All my experience with Dyn was years ago in high end auto systems though.

Regards,
Marc
 
#79
Mark A. Gulbrandsen said:


There is no comparison. The Krell has that magical midrange that no other amp I've heard has atained. Enjoy building yours!

Mark
Click to expand...

Sorry but I have to diagree. Nothing beats a pass amp in the midrange. Especially with voices. The Krell has more bass and brighter highs but can't compare to the Pass labs designs.

I think after you tweak the A-40 a little you will see what I mean.
I may take a couple of weeks of listening. :whazzat:
 
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