Another look of Lizi

[Leolabs]

Here she is,with modified input stage.Theoritically,the first stage is around 5mA and the second stage is around 10mA.Still waiting for critics and recommendations

[amplifierguru]

Hi Leolabs,

Much nicer. This would benefit from chip drive - would set DC conditions.

Otherwise you should put in a FB C or offset adj. How's the THD?

Simple but weak in the PSRR and wastes supply V.

Cheers,
greg

[jacco vermeulen]

Fully symmetrical, haven't seen much of that around here.
Why load the Vas instead of using a buffer, you don't like drivers ?
Those fancy input and output devices deserve separate rails, and saves some volts to please Mr Ball.
Why not add filtering to the lines feeding Q1 and Q2, or use CCS's ?

Kind of ironic that so few give a shot of trying a fully symmetrical design driven by an opamp, as if it were a thing of the past.

I see we had a 12 hour blackout ?

[Leolabs]

Originally posted by amplifierguru
Simple but weak in the PSRR and wastes supply V.

Ok,added her with local filtering caps,and reduced her supply voltage to +/-24V

Originally posted by jacco vermeulen
Fully symmetrical, haven't seen much of that around here.
Why load the Vas instead of using a buffer, you don't like drivers ?

Kind of ironic that so few give a shot of trying a fully symmetrical design driven by an opamp, as if it were a thing of the past.

Try to keep her as simple as possible,so only 3 stages,and NO BUFFER for drivers,and NO OPAMP.

[Leolabs]

The second stage now operating at around 20mA.