also the H-100 is a complete abortion on the inside ... the amp chassis have a combination of tube and transistor electronics. it was rushed into production without a prototype being built first, and it shows.
these things were failing as soon as they were shipping. Groove Holmes tried gigging with the X-77 for a week and a half, and it fucked him so hard he kicked it outta the hearse while it was still moving and went back to his '58 B3.