I am starting the ACP+ build thread.
I have posted the documentation for the ACP+ preamp/headphone amp
which is the subject of the DIY build session on Saturday Nov 9 at the
Burning Amp Festival.
https://www.firstwatt.com/wp-content/uploads/2023/12/art_acp.pdf
I have assembled a total of 55 kits for the occasion, of which I
understand 30 will be built on site and the rest distributed in some
fashion.
Our member 6L6 has been working on his build guide as well.
As with the ACA, I anticipate it being available in the store soon.
I have posted the documentation for the ACP+ preamp/headphone amp
which is the subject of the DIY build session on Saturday Nov 9 at the
Burning Amp Festival.
https://www.firstwatt.com/wp-content/uploads/2023/12/art_acp.pdf
I have assembled a total of 55 kits for the occasion, of which I
understand 30 will be built on site and the rest distributed in some
fashion.
Our member 6L6 has been working on his build guide as well.
As with the ACA, I anticipate it being available in the store soon.
Papa, love another project from you!
Unfortunately, I am based in Singapore and can't make a trip to BAF 2019 due to the distance. I tell myself i will make the trip some day. ;-)
If the kits are ever available to the greedy boys in the Far East before the store, let me know.
Ed
P.S.: did you sign off the year as 29 on purpose? 🙂
Unfortunately, I am based in Singapore and can't make a trip to BAF 2019 due to the distance. I tell myself i will make the trip some day. ;-)
If the kits are ever available to the greedy boys in the Far East before the store, let me know.
Ed
P.S.: did you sign off the year as 29 on purpose? 🙂
Nelson,
On the schematic the input connects straight to ground through a 1k resistor. The layout seems to tell the real story.
Graeme
On the schematic the input connects straight to ground through a 1k resistor. The layout seems to tell the real story.
Graeme
Last edited:
Nice 🙂
Fulfills three audiophile wishes:
1.Has the right amount of H2 (so, no need for H2 generator)
2. It is a hi-end headphone amp
3. And, can also serve as 1 Watt amp 🙂
Fulfills three audiophile wishes:
1.Has the right amount of H2 (so, no need for H2 generator)
2. It is a hi-end headphone amp
3. And, can also serve as 1 Watt amp 🙂
OK, I fixed the schematic and the reversal of the name.....
Moderators, could you please change the thread name to ACP+ ?
Moderators, could you please change the thread name to ACP+ ?
I had hoped to be able to make this my first BAF but alas, someone else in our household had other ideas...
I am in the market for a new headphone amp so I'll look forward to availability of this one. It appears to be superb from the write-up.
Thank you, Mr. Pass, for another of your fine creations and generous donation to this community!
I am in the market for a new headphone amp so I'll look forward to availability of this one. It appears to be superb from the write-up.
Thank you, Mr. Pass, for another of your fine creations and generous donation to this community!
Thank you so much Nelson, this looks amazing!
Will boards be available for those of us who can’t make it to the event?
Will boards be available for those of us who can’t make it to the event?
Thank you, Papa! I appreciate your generosity to our community.
I’m looking forward to the build and paring the preamp with my two ACA’s.
I’m looking forward to the build and paring the preamp with my two ACA’s.
Looks like 76k to me.
Have I slipped a cog? (Again?)
In solid-state work this does not matter. But there are some tube and passive sources which may strain mildly in 20k and be fine for >47k.
OTOH: why not R2 R3 = 1Meg? The JFET won't care. Rin now 500k. Then a 0.1uFd film-cap for C1 to reduce kneejerk reaction to an electrolytic (not that I care about an ample e-cap). I suppose price is a goal?
