• MRJ
  • MRJ
  • MRJ
  • MRJ
  • MRJ

All MRJ Custom Electronics equipment is handmade in the United States of America by me. I specialize in designing and building high-end, custom tube guitar amplifiers.

For my original designs, I combine the best parts of time-tested and proven vintage circuits with modern and innovative tube technology and design to create a wide range of amplifiers for recording and live use in many different genres and rig setups. Depending on the amp, I use different combinations of vintage, replica, and new components to create the sound you are going for, AND create an amp that is reliable. You can count on me to over-engineer everything in the amp -- there are no shortcuts being taken here! Everything is designed for the worst-case-operating-scenario, and then some to deliver a stable and rugged amplifier.

For my vintage amp clones, I try to be as faithful to the original design and components as possible. In certain circumstances, I'll "improve" certain parts of the circuit for safety or reliability. Of course, clones can also be completely customized with added features, controls, and tone-altering modifications.

Recently, I've also started building microphone preamps, guitar effects, and other recording gear to add to my studio, as well as for other studios in the area.