Hi Guys,
Well I have to say that the MP1 must be the easiest rack to maintain.
I had no PCB soldering experience and thanks to some parts sourced via MarshallJMP here, within an hour or two I was able to:
Install new EPROM v2, install Battery kit, replace all Pots, and replace the output jacks.
All without issue, thanks to the very modular design of the rack housing, making access to the boards easy.
So next is to tone chase...
I have discovered that using the MP1 Effects loop is noisy (I only tested with an Alesis Quadverb GT in mono in the loop).
Will try a few other effects racks, but it seems to me that to take advantage of Stereo effects you probably need to ignore the Mp1 effects loop and instead used the MP1 main outputs into the effects rack then into the power amp inputs (my power amp unfortunately doesnt have a loop).
I currently have no effects before the MP1, so it seems pointless introducing a noise gate that the point, so I guess that the effects rack I need to use must 1- Have stereo inputs and outputs, 2 - Have a noise gate inbuilt.
Unless im missing something and the MP1 effects return socket is balanced/stereo and can take a TRS jack? (I could then use an Insert or Y cable / dual mono from the Alesis effects rack into a single TRS/Stereo input on the MP1 effects return?)
So far the MP1 tones looking promising, will be interesting to se what adding a little delay and reverb will bring.
cheers,
Gerard.