I was flipping through my documentation yesterday and found something you might be interested in. Rare Marshall 2201 JMP Lead & Bass 30W 2x12" Combo schematic.

Have fun ...

It has been quite a while since my last post. Meanwhile, "The Howler" project experienced a lot of iterations and reached its final stage (I'll talk about that some other time). Anyway, the new idea was born and materialized based on the same concept. I would like to share it with you.
Practice amp with switchable 1 to 4 Watts output power (yes, solid state amp with built-in power attenuator), AUX input for "backing track use", integrated 50 mW headphone amp with dummy load (not just plane disconnection of the speaker and attenuation of the output power level), emulated output for recording, built-in FX module (my design, PT2399 based (only one chip used), not the infamous Belton brick) ... And yet, I tried to make it as simple as possible (only plane volume and tone controls, middle boost and boost switches, single coil/humbucker switch ... And ... I named her "The Toy".

This is the result ...

https://youtu.be/j47IyNkgv2M

https://youtu.be/UsENW2NEOBI

Videos were recorded with shitty camera microphone, Fender Stratocaster straight into the amp, no effect pedals, just a little of my "PT2399 'verb" ...

The middle boost switch and the attenuator were not built in the prototype (I added them later), but I think you'll get the idea 

Cheers ...

Something I have been working on for the last two months - A 15W combo amp with 8" Jensen speaker and footswitchable boost and reverb.

Amp cabinet :

 

Output stage, Power Supply & Transformer, Mains PCB, Speaker & Line Out PCB :

     

I shall keep you informed of progress.