Cascading diamond buffers - a cheap low THD 10W amp with TIP41C

[suzyj]

Your BZX79C2V4L model is broken.

Try:

.model BZX84C2V4L D(Is=2n Rs=.5 Cjo=200p nbv=3 bv=2.4 Ibv=1m Vpk=2.4 mfg=OnSemi type=Zener)

 

[potstip]

Thanks for very fast response.

Now i am able to test both amplifier schematic on the first post and last post but find higher distortion compared with your. Can i ask one more help

 

[potstip]

Hello suzyj;

After a bit of research, i add some tight tolerance and better parameters for the simulation. Please see attached file. First one looks great but the last one still shows high distortion.

 

[suzyj]

Theres a good tutorial and lots pf help in driving LTSpice at Installing and using LTspice IV (now including LTXVII). From beginner to advanced.