We absolutely love that Marshall added a very good effects loop to their Studio Series amplifiers. However, the only way to activate the loop is to reach around back and push the button. Not so easy to do when in the middle of a song! 

This kit fixes that problem.

Simply remove the old rear PCB, install this new one along with one wire to power the circuit and you're all set.

Footswitchable effects loop that lights the LED on the standard Marshall 1 button footswitch.

In this kit you will recieve the PCB and all the compenents requires to fully build. 

Also included in this kit is the footswitch required to switch your loop on and off.

Soldering skills and knowledge of working with high voltage tube amps are required.