Is this distortion normal? (Followup in comment)

This is the homemade JTM. With a low (80Hz) sine wave at full the distortion looks a hella lot different to it at 1kHz Any help with this would be appreciated Thanks

Gain varies quite a bit vs frequency in most amps, then there's the whole phase shift at different frequencies phenomenon. Does it sound good, or are you trying to figure out an issue?