This is my newest amp, it's a Music Man HD130. This is the bass model, since it has no reverb or tremolo. It has the 12AX7 driver tube in the preamp along with the LM307 ICs. It also features the Music Man Hi and Low power switch on the front. The back switches are for ground, standby and speaker impedance. Inside the amp, the preamp electronics are on a PCB while the power amp electronics on handwired. The controls are attached to the board by wires, and the tube sockets are mounted directly to the chassis.

I got this amp with a Music Man 412GS speaker cabinet. It still has the original speakers and is an enclosed back so it's pretty heavy. It has one side with no casters and one side with casters...don't know if that's original or not, but the casters work great.