If it is required get more grip of the speaker, the following can be done:
Make the Errata note with 470R between Q13 and Q14 and between Q12 and Q15
R7 and R8 changed to 2K
change R22to 500R.
Do a new trim.
Trim to 500mA idle. As this gives the best distortion.
Distortion into 4W 8R is now 0.068% into 1KHz instead of 0.137%
Zout is now 0.28Ohm instead of 0.35Ohm.
The peak idle current at start up rises to 1Amp shortly for a few seconds. After 5 min it has settled to 500mA.
Make the Errata note with 470R between Q13 and Q14 and between Q12 and Q15
R7 and R8 changed to 2K
change R22to 500R.
Do a new trim.
Trim to 500mA idle. As this gives the best distortion.
Distortion into 4W 8R is now 0.068% into 1KHz instead of 0.137%
Zout is now 0.28Ohm instead of 0.35Ohm.
The peak idle current at start up rises to 1Amp shortly for a few seconds. After 5 min it has settled to 500mA.
It works well with R7 and R8 as 5.6k also giving even lower distortion and Zout.
Zout : 0.112Ohm
Distortion into 4W 8R is now 0.04%
Zout : 0.112Ohm
Distortion into 4W 8R is now 0.04%
Great news 
Sonnya has put vers. 1.7 up for sale at Vendors Bazaar http://www.diyaudio.com/forums/vend...-v1-7-mosfet-current-feedback-amp-module.html
Sonnya has put vers. 1.7 up for sale at Vendors Bazaar http://www.diyaudio.com/forums/vend...-v1-7-mosfet-current-feedback-amp-module.html- Status
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