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PS Audio "Gain Cell"
PS Audio "Gain Cell"
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Old 28th September 2004, 07:44 PM   #11
jam is offline jam  United States
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Steve,

We used to call the Quatre a "Grain Cell".........
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Old 28th September 2004, 07:51 PM   #12
Steve Eddy is offline Steve Eddy  United States
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Quote:
Originally posted by jam
We used to call the Quatre a "Grain Cell".........
Hehehe. I'll pass that on to Guy Hickey next time I talk to him.

se
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Old 28th September 2004, 08:05 PM   #13
pmkap is offline pmkap
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Quote:
Originally posted by jam
Sounds like a product to reverse engineer......................
Reverse engineering???? We don do no steeenk'n reverse engineering. I suggested this exact architecture to a small manufacturer about 2 years ago.

McGowan canna hep hisself, and he includes enough 'meat' in his hyperbole that if you think about it, you can suss out what he is doing.
Same goes for his 'unique' Balun, the UltraOutlet, which is simply a common mode choke.

But if I do implement the sucker using those fully differential ICs from TI, is Nelson going to come after me for violating his patents on that use of folded cascodes?
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Old 28th September 2004, 08:08 PM   #14
jan.didden is offline jan.didden  Europe
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I don't think there is a wolfson 8816 in it since that is 'digital' sort of. And they said 'pure analog' (unless they re-interpreted standard English..).
How is that gain controlled? A pot? DC control? That should give another clue.

Jan Didden
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Old 28th September 2004, 08:10 PM   #15
jam is offline jam  United States
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Would make a good DIY project though.......................anyone up to the challange?

...with Mr.Pass's permission, of course........
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Old 28th September 2004, 10:13 PM   #16
pmkap is offline pmkap
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Jan,

You may well be right. But given Mr. McGowen's interesting approach to English usage, he could well argue (if indeed they're using the Wolfson) that the signal path is indeed purely analog. As the voulume and balance controls are operated via a remote control, and I see no motororized pots, I don't see it as a stretch to call it purely analog. Otherwise, he could be using a VCA, which I doubt, or simply a pga between the phases, but that might be considered 'attenuation". Dunno, but the Wolfson in conjuction with the TI THS41x1 does seem like the logical (and quite interesting) approach.
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Old 29th September 2004, 03:12 AM   #17
thomas997 is offline thomas997  Canada
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"What’s inside the Gain Cell
So revolutionary is the Gain Cell design that we’re not going to publish what’s inside nor do we intend to patent it. Instead, we have chosen to protect the technology by encasing the circuitry in non-conductive epoxy (known as potting), thus keeping our competitors completely in the dark."


Epoxy cant stop me... someone get one of these and crack it open.



btw the main chip has 16 pins, then the jumpers must be for signal/power. ?
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Old 7th April 2010, 03:53 PM   #18
Tiff_Needle is offline Tiff_Needle  Canada
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Quote:
Originally Posted by thomas997 View Post
"What’s inside the Gain Cell
So revolutionary is the Gain Cell design that we’re not going to publish what’s inside nor do we intend to patent it. Instead, we have chosen to protect the technology by encasing the circuitry in non-conductive epoxy (known as potting), thus keeping our competitors completely in the dark."


Epoxy cant stop me... someone get one of these and crack it open.



btw the main chip has 16 pins, then the jumpers must be for signal/power. ?
Sorry for digging out of the dirt such an old thread, but I have to ask...

Does anyone by now knows what is it all about?

I saw a comercial amplifier from PS audio using B&O Icepower modules with a pair of these...

Since I have two ASP1000 I would like to try these wonder gain cells to see how does it really improve the overall sound.

Or if you have any other sugestions for my input stage, they are very wellcome.

Cheers,

Tiff
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