New Stasis front end

[Blk Dynamite]

Thanks! I listened to it for about 35 min today and my 1st impressions are positive. A lot more assertive than I’m use to. Gonna listen to it more throughout the week

I got the sockets from Sonic Craft

https://www.soniccraft.com/product_...-xlr-p-1690?osCsid=t17q230in2mmmvcvrk8ip3k7a3

 

[Mikerodrig27]

Very nice. I'll be curious to hear more about your impressions once you get some more listening time on it.

 

[Blk Dynamite]

I plan on getting some listening time in late this afternoon. Hopefully the kiddo doesnt pull me away ha

 

[Blk Dynamite]

Very nice. I'll be curious to hear more about your impressions once you get some more listening time on it.

Been getting more acquainted w the sound and I must say this is a wonderful amp! Low end and overall presence are great. Top end is clear too. Of the ones I’ve built (AJ, M2x and F4) this amp has more command of the sound. I still love my F4 as its still my go to and I like the clean nature of the M2x but this amp has some major balls man. If the Aleph J is considered laid back and chill, this build is the life of the party. My father is going to love this amp; It’s right up his alley sound wise

 

[Zen Mod]

Fugly!

 

[Mikerodrig27]

That has been my experience as well. The sound is nice, warm, and enveloping but it is also assertive. I'm glad you're enjoying it! Your father is one lucky guy.

 

[Stale25]

Finally got this thing up and running. Used Pico’s chassis, 8 deep boards. Started off at 44.5 unloaded volts and after biasing, came out to 41 volts so guessing im getting a little over 100 watts if my math is right. It’s biased to 150ma which is getting me a little over 50c

Stunning. Where did you buy the terminals on the caps and what do you crimp them with?

 

[Blk Dynamite]

These are the terminals I used

https://www.amazon.com/gp/product/B07FSPGG78/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&th=1

and the crimps I used

https://www.amazon.com/gp/product/B017S9EINA/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

 

[md_Stryker]

...

are you ready for mosfet - IXYS pucks iteration ?

no need for OS pcb, at all ..... even more radical than T03 approach.......

I would love an IXYS puck version.
Do you have an thoughts on this?

-Michael

 

[johnhenryharris]

I think I would prefer to try the Silicon Carbide MOSFET output devices. can run higher temps with more bias and deeper into Class A.
But, so happy with the current Bipolar output stage that I am Not yet motivated to experiment more than I already have.

 

[Mikerodrig27]

John, I would recommend trying mosfets. I think you will like it. What speakers are you using?

The pucks have a nice sound. As do the multiples of 240/9240's in an output stage. Pucks are simple yet still powerful.

 

[johnhenryharris]

I have listened to some fine MOSFET output stage amps and laid out PCBs for some big amps which is why I want to try some SiC MOSFET parts. Higher temperature tolerance, lower on resistance, just have to see how they sound in an output stage.
For speakers I have a pair of PBN Audio Sammy’s. They are very easy to drive and exceptionally great sound. Last I looked a couple years ago the drivers in the pair of speakers were $6k alone.

 

[Zen Mod]

I would love an IXYS puck version.
Do you have an thoughts on this?

-Michael

for me, it's trivial to make - just arranging appropriate pcb for Babelfish XA252 OS

in fact, I already have them, prepared for (future) work on bridged/Ultrasymmetry/FluxCap/42 Babelfish XA252

but, dropped down on priority list

just for your amusement, Eagle sshot, don't have pics of pcbs on shelf ......

 

[Mikerodrig27]

I have listened to some fine MOSFET output stage amps and laid out PCBs for some big amps which is why I want to try some SiC MOSFET parts. Higher temperature tolerance, lower on resistance, just have to see how they sound in an output stage.
For speakers I have a pair of PBN Audio Sammy’s. They are very easy to drive and exceptionally great sound. Last I looked a couple years ago the drivers in the pair of speakers were $6k alone.

Those are very nice speakers. I haven't heard them in person but I've heard of them. Only good things.

 

[Mikerodrig27]

FluxCap/42 Babelfish XA252

So what is this FluxCap/42 stuff about? Would it still be able to be set up as SET or SIT with the SUSY? That could be interesting on some nice panel speakers.

 

[TungstenAudio]

Just Zen Mod having some fun. The Flux capacitor was a precursor to the Mr Fusion powered flying time machine.

 

[poseidonsvoice]

ZM is a gift to all diy’ers. Hip hip hooray for all named Pradanovic and all named Aleksander!

Best,
Anand.

 

[Zen Mod]

Would it still be able to be set up as SET or SIT with the SUSY?

if you observe Eagle sshot closer, there are all parts needed for level shifter mosfet follower, same as additional pads for connection of outboard SIT, and additional mounting holes - needed on right side when SIT is used instead of mosfet puck

what should be outcome - lower power in some amount, vs. straight mos

THD Spectra - whatever set in FE

 

[Mikerodrig27]

Yes of course. I should have looked closer. Very nice!

 

[TungstenAudio]

A quick heads-up:
The KSA1220 transistors have been discontinued by the manufacturer and are no longer available (unless you're willing to place a minimum order in excess of 1000 pieces). Oddly the KSC2690 are still available, but there is no good option for a PNP complement. The original Sanken parts are long gone.
Fortunately the Toshiba TTC004A and TTA004A are still being manufactured and are available from a few sources. I can confidently recommend these parts, as they are what I used in the custom front end of my F6.

I'm finally getting around to building two amps based on ZM's front end with his 8 deep Stasis OS PCBs. I plan to start a separate thread once the parts start arriving..