Diy Attenuator project

A while ago I built a simple L pad attenuator, which I use occasionally but would quite like to have a go at something a little more professional, I’d like it to be able to switch between 4-8-16 ohms and use it up to my biggest amp, which is a 45-watt pro reverb.
Anyone know of, or recommend any kits, schematics etc.
Thanks in advance
Stax

PS Not sure if this should be in the effects or amp forum as it's literally somewhere between the two?

Check out www.tedweber.com. Under amp kits they have an attenuator kit for 200w amps. They post the schematic on the site. I used their designs for an amp project.

Thanks, didn’t see that when I was checking out his site.
Stax