Ampeg BA 108 Mods Phase 1A - From practice amp to Coffeeshop Micro Rig. I like the idea of portability. Carrying stuff across a parking lot and up stairs was getting to my rotator cuff. Markbass stuff might help. It sounds great, is light and portable, but too expensive. I read the whole thread about Micro and Nano Rigs. My shoulder needs that I get a portable micro rig, so I decided to make a portable coffeeshop rig myself. I need a working amp that I can rely on, so I decided to get another amp for modification project. That way, and if I blow up the project amp, I can keep practicing with my current amp. Starting with a complete working unit will give me one that looks good after I finish, rather that some hack job that sounds good, but looks bad. Been there, done that. At $99, the Ampeg BA 108 is cheap enough to make it a project. Lightly used units can be found on Ebay, Craigslist. I got mine for $69 in the used amp section of Guitar Center. The TB-110 project is pretty cool. It uses the Eminence S2010 10 inch speaker. The BA-108 has about the same volume as the Goldwod box minus the shelf, so this project will use the same speaker. The S2010 is a significant upgrade to the BA 108. 2 inches larger in diameter than the stock BA 108 speaker, but just about doubles the cone area. So it can push more air. The voice coil grows from 1" to 2" for power handling. The neo magnet helps keep the weight down. Win.