|25th April 2019, 04:19 AM||#1151|
Join Date: Sep 2001
Location: Melbourne, Australia
I have reworked it for best performance, but there are limitations with only 12V and a stiff 32R load. Both limitations increase the THD but the harmonic profile is still very good, with typical THD of 0.03% at 1Vpp into 32R load at 1KHz. H2 is dominant.
At 32R load you are limited to an output of about 2Vpp. At higher impedance loads, such as a 280R Beyerdynamic, your output voltage rises to 9.2Vpp, which is very loud indeed.
Your resistor divider for the input voltage reference is a little off, and you should use a bias resistor of 22k, rather than 10k, to minimise changes to the divider reference voltage.
The adjusted schem is attached. Nice circuit, sounds wonderful!
Aspen Amplifiers P/L (Australia)
|25th April 2019, 06:11 AM||#1152|
Thank you so much!
You are a master at this craft!
I will surely build it.
Thank you again.
My revamped site https://sites.google.com/site/analogdesign1234/
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