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stax mafia electrostatic portable

kevin gilmore

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I have one more, maybe a stupid question - how are these four amplifiers connected - there is no phase inverter there and looking at the pcb I can see that the inputs in the channels are connected (?) - I'm tired of this matter and I can't sleep because of it - can you explain it to me ?

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On 1/13/2022 at 3:49 AM, HVRV said:

This is the latest design might look similar to Stax-D10 but the fact is different.




Why under cut a supposedly original design by making it look just like the SRM-D10? 

Seems to show a lack of confidence

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I have a certain idea - you could add a direct input for a balanced signal - my qudelix gives 4V rms in this mode - bypassing the potentiometer, which is not of high quality - anyway, it is unnecessary in this configuration because the gain control is taken over by the phone or the qudelix itself (of course it writes about my case)

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On 2/8/2022 at 8:26 PM, kevin gilmore said:

well there are 2 ways to do this.  instrumentation amp and inverting/non inverting.

pick one, they are roughly equivalent.

Nice joke :)

I simulated your schematic in topology from pcb and it does not work in any way  - only in single mode, not bridge. And I know it works to you - some "king of magic" :)

I always liked to check the circuit in the simulation before I did something - we have something in common :)


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3 hours ago, kevin gilmore said:

if you can't copy it now...

Thank's, but my problem is when I connect them single amp like on a kerry pcb together, the simulation does not work. And I can see that it works in real - maybe I'm doing something wrong in the simulation ??

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