A Black Box to Solve Everything

Yeah, I guess it would go the way of the QOL Completion Device. It would be cool though for people with solid state amps.

Sounds like something Bob Carver could create in a week!

My Carver Tuner, and Carver Cube Amp both had unique patented features that did what he said they did. He’s unique himself.

I think he said, pick any amp, he could create that amp's sound. Pick another, he could match it's sound

Yes, he called it the transfer function. So we need him to make a variable transfer function box.

@koestner It doesn’t solve your inquiry completely, but Modwright released his Analog Bridge about nine months ago. I was one of the beta testers for the unit. It is meant to be placed anywhere you desire, especially between preamp and amp if applicable, or just between a source and preamp. It’s not cheap, but it is very high quality and offers a good amount of flexibility in the three tube types it supports. 

https://www.modwright.com/products/analog-bridge.php

In pro audio there are any number of devices and even more software products that emulate tube distortion.  Some actually use tubes, but most use DSP to achieve their sound.  They are widely used as an effect.

A company call Line 6 has a very well received line of guitar amps that DSP model a variety of tube based guitar amps.  They might not exactly nail a specific amp, but they get pretty close and can sound quite good in their own right.