SOTA Pyxi has arrived

The DIY came first. The Pyxi is more or less equivalent to generation 2 of the DIY design, before the dual parallel input stages were incorporated. The sound is essentially identical, but with particular requirements specified by SoTA.
 
cgallery said:
Like like like like like.
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It looks like SoTA will build a few MM only versions of the Pyxi, with 35dB and 45dB gain and MOSFET inputs. They will likely try them in house and with select potential customers.
This unit is specifically tailored to the MM, MI high output cartridge and SUT/MM crew. It will have worse short circuit input noise but better real world use noise than the current Pyxi under these circumstances and will meet the very high output cartridge need. The MC2000/T2000 case, for example will have essentially indistinguishable noise from the intrinsic noise of the cartridge. The RIAA compliance will be the same in both gain modes, which are controlled by the front panel switch. The distortion will be better for MM etc. than in the Pyxi "duo".
The load Rs are presently set at 47k, 9.6k and 1k, consisting of 47k fixed, 12k and 1k switchable. The Cs are the same.
Understand that this is in the prototype phase and may not become a real product, but I would welcome any input.
 
wyn palmer said:
It looks like SoTA will build a few MM only versions of the Pyxi, with 35dB and 45dB gain and MOSFET inputs. They will likely try them in house and with select potential customers.
This unit is specifically tailored to the MM, MI high output cartridge and SUT/MM crew. It will have worse short circuit input noise but better real world use noise than the current Pyxi under these circumstances and will meet the very high output cartridge need. The MC2000/T2000 case, for example will have essentially indistinguishable noise from the intrinsic noise of the cartridge. The RIAA compliance will be the same in both gain modes, which are controlled by the front panel switch. The distortion will be better for MM etc. than in the Pyxi "duo".
The load Rs are presently set at 47k, 9.6k and 1k, consisting of 47k fixed, 12k and 1k switchable. The Cs are the same.
Understand that this is in the prototype phase and may not become a real product, but I would welcome any input.
Click to expand...

What is the minimum capacitance?

Edit: I just looked it up.

When they're ready for customer evals, I'll buy in.
 
It seems that I'll receive a MM only version at the end of next week or shortly after. I'll test it out at home and then it will be open for sampling. @cgallery, are you still interested in beta testing it?
After that, if anyone wants to give it a go for use with a high output MM or moving iron or with a SUT I would be able to "put you on the list".
 
wyn palmer said:
It seems that I'll receive a MM only version at the end of next week or shortly after. I'll test it out at home and then it will be open for sampling. @cgallery, are you still interested in beta testing it?
After that, if anyone wants to give it a go for use with a high output MM or moving iron or with a SUT I would be able to "put you on the list".
Click to expand...

Yes, please.
 
Add me as well, I have many MM's a few High output MC's and a Namamichi MCB 100 SUT .

Athanasios
 
SoTA has sent me a board for the MM only version.
IMG_6299.jpg

Above is the RIAA flatness for one channel. Both are essentially identical, so the unit is very close to the simulated results.
Gain, I believe, is 35/45dB. The input is MOSFET and more suitable for high source impedance cartridges and high gain SUT setups.
I'll package the unit in a prototype case for sending out, then test it thoroughly.
 
Well, this is getting complicated. I have, effectively, one standard Pyxi and one MM Pyxi (available in a few days) available for trials, but I don't want to spend the $10-$15 each way for shipping unless you guys can guarantee to give a good review (just kidding ;)).
Any suggestions on how we organize this?
 
I say each person who gets to review it pays for shipping to have it sent to them, then the next person pays to them etc etc etc , till it finally goes back to Wyn . I could be the last person on the list as I won't mind paying shipping to receive it and then send it back to Wyn.

Athanasios
 
That works. I'd like to try the MM Pyxi with a couple different of SUT / Cartridge combinations.
 
I know I said I was interested in testing one but I've gotten interested in the DIY route and I think I'll continue down that path for the time being.
 
wyn palmer said:
I'm sorry, I don't understand. Are you asking if the phono stage can drive a passive preamp? If so, then if the input impedance is 2k or more the answer is yes.
Click to expand...

I didn't see how to set the volume from the SOTA Pyxi to my power amp. My Kenwood C1 preamp has a volume control.
 
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