Ultimate amp simulator

[Wavebourn]

This simulator, I believe, may be used to simulate sound of any possible power amp.



Switch: SE/PP

Pot: drive

[pinkmouse]

That pic is very bad and huge! Could you redraw it as line art then I'll delete that one. Thanks.

[ChocoHolic]

...that the both antiparalleled output diodes are worse than most cross over distorsions in normal amps.
But you could come closer if you put some variable feedback across.

[Wavebourn]

Originally posted by pinkmouse
That pic is very bad and huge! Could you redraw it as line art then I'll delete that one. Thanks.

It's not a line art, it is an art of simulation!
And actually, it is 640x458 only.

Originally posted by ChocoHolic
...that the both antiparalleled output diodes are worse than most cross over distorsions in normal amps.
But you could come closer if you put some variable feedback across.

They are worse if gain of the limiter is low. When it is high, crossover distortions are low. Try!
Diodes are EXDPONENTIAL devices, not just on/off!

[ChocoHolic]

I tried.... about 20 years back during my first attempt to overcome feedback effects from microphones...

It sounded awfull. And did not properly overcomefeedback anyway.
But I used a low value for the resistor at the output, so there was almost no output at low input levels...

But wait.... I am starting to understand the cobination of the OP amp limiter circuit with the nonlinear R-2D-output.
...partially compensating..... OK, funny idea.

But do you really think that this is covering all sound effects of amps?
I mean... also the amp gurus usually live from the experience regarding special components, circuits and layouts... But I have never heard about any reliable model to predict the sound of a new circuit with new components... Everybody just guessing and the honest ones often find reality different than their guess...

[Wavebourn]

Originally posted by ChocoHolic


But wait.... I am starting to understand the cobination of the OP amp limiter circuit with the nonlinear R-2D-output.
...partially compensating..... OK, funny idea.

Yes!

And the idea is not new! in late 70'th I simulated tube amp distortions in transistor amp such a way.

But do you really think that this is covering all sound effects of amps?
I mean... also the amp gurus usually live from the experience regarding special components, circuits and layouts... But I have never heard about any reliable model to predict the sound of a new circuit with new components... Everybody just guessing and the honest ones often find reality different than their guess...

Just put the pot and the switch under the pedal and give it to a guitar player... It sounded like a compressor with variable distortions.

Late in 80'th I've seen a pedal from Boss that used the same idea. It had a pre-equalizer on input (boost of highs) and an eq on output. But they did not have a "SS/P-P" switch, also they did not put a drive pot under the pedal.