Re: Does This Exist ?????
A pedalboard.com dual loop box is an essential stompbox for a guy with a lot of
"tonesucking" pedals. I use the left button to bring in my 2 Line 6 pedals, and the right button to send the signal to a tuner, with no return, so it's silent.
Live, it's great because I can have both Line 6's set up for some combined effects, and switch them in or out with one button that's in front on the pedalboard, while the Line 6's are situated in the back of the pedalboard. And I can tune quickly by hitting the right button, without any sound going to the amp.
As far as 59Paul's situation...the only option is to have a tech install an FX loop with a break between the pre and power section and two jacks on the back of the amp.
If you mod that Marshall 2204 with actual Marshall female jacks, it'll still look stock, but have a nice FX loop.