Stadium 400-T Circuitry Photos

30 11 2009

I wasn’t surprised that the Stadium amp had very little circuitry when I opened her up,  she sounds very direct and uncomplicated.

A real point to point beauty laid out intelligently and very little of the ‘rat’s nest’ jumble to deal with.

This little thing has a few wiring surprises such as the inputs going directly to the volume control before hitting any tubes or resistors.  More on that later as I plan to open up and analyze the circuitry of each amp that has been presented here to date.





Stadium 400-T Tubes And Speaker

19 11 2009

There are no markings at all on the speaker of the 400-T.  It’s an odd choice of speaker given the size of the cabinet and I have to admit to never having seen an oval shaped one in a guitar amp before. It looks like something intended for a car stereo setup but I can’t argue with the results of the sound.

The tube setup is a bit unusual as well.  The 35W4 rectifier is coupled with the 50C5 output for what looks like a the classic old radio trio but instead of the usual preamp companion of a 12AV6, we have a 12AX7! The 12AX7 provides more bite here than is generally found in amps that feature the radio tune lineup.