Simple 40 Watt amp with reverb and pull gain control for a little dirt. No big issues just a clean and service! Simple PCB based transistor deign.. nicely laid outBias pot and instruction for how to set it in the manual easy.. and this one was biased a little to hot..Needed to add a 3 core power lead to earth the chassis.. not earthed from the factory by the looks of it.. Feels safer now no difference in soundLike the MIJ speakerMost of the amp is made in Japan but the reverb tank comes from The USA (really did own the reverb tank market for a long timeThis is the Bass brother of the amp in last week from a customer for it’s 30 year service. Nice little Japanese Solid State JX40 in for a service/repair. Was supposedly not working but going through a normal service then powering up there were no issues. Added 3 core power lead though to give her a good earth and replaced the broken pilot light.