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Building a very simple box is pretty easy IF you have good square/straight cuts on the plywood. Unfortunately a jigsaw isn't good enough. Here in the US, we can get the lumber yard to cut our wood for us at about $1 per cut though. Just make sure you do your measurements well and don't fall...

You could do a very bare bones head box for a lot less money, no tolex, no corners, etc. Just paint it black and it will look decent in a utilitarian way. I've seen many racks made like that being used in professional situations.

My switching schematic for my DIY two module, dual channel bass amp:

I've had a couple of requests for info about the RM20 amp that I modded to accept dual channel modules, so I thought I'd share all the info here on this thread. I don't intend to do any of these mods for folks myself, but feel free to use the info yourself or share it with a tech who can do the...

I've had a couple of requests for info on the single to dual mod, so I'll post a thread about it in the DIY section.

It look like the input section was modded. Do you have any info on what was done? Any other mods?

Sold.

Sale pending.

I'm looking to sell an RM-20 head that I just refurbished. This was the one that was for sale recently here in this forum that had been converted from a combo. After I got it, I made a small repair to the output stage, built a new cabinet with fresh tolex, and added a nice leather handle. I...

Just PM'ed you on the XTC.

I just got back from the amp show and had a chance to run through them all. All I can say is wow! Rob did a great job on these guys. The thing that really struck me is how different they all sounded from each other. These were not subtle shades, but really fundamental differences. I think...

Also, if you have a way to demonstrate a foglifter at the Ampshow, I might be interested in picking one up for my MOD50.

I'll be there at the Amp Show on Saturday. I cant wait to try out some in person! So I just built that modular bass amp for myself. Do you think any of the new mods might be good for cleanish to crunchy bass?

If you are sensitive to the loading of the cathode follower on the fx send, you can try two things: 1. A treble bypass cap. You wouldn't want a full bypass, so play around with series resistor values along with cap values until you find a set of vales that properly rebalances the highs at your...

Fixed my broken picture links, I think.

I'm approaching the finish of my DIY modular bass amp and I thought that some here might be interested in the project (if not here, then where else? ;) ) At first, I was just going to use an RM4 with a big solid state power amp, but I really wanted a couple of features that rig couldn't...

I'm a big fan of closed back, but I'm a die hard heavy rock Marshall guy who switched over to the MOD50. I have half a dozen open back combos scattered around the house for noodling and recording, but they never cut it for me when playing in a band. My ideal cab is still my '77 Marshall 4x12...

That's my exact rig. I have half a dozen other modules, but those two spend 90% of their time sitting in my MOD50. I love the SL2 so much that I never really bothered to chase the after-market mod dragon. :D My '78 Marshall 2203 is getting dusty.

Almost forgot, the card edge connector is a Sullins EBM12DRAS.

I'm currently building a two module bass amp for Egnater/MTS modules, so I've recently been popping in here lately (just joined today). Your pin-out looks right to me, I'd just like to add: pins 3,4,5,6,E,F are the module's signal ground plane pins M,N are the modules heater ground for the...