I bought this brand new in January 2016 directly from Monoprice and still have the original double box that it shipped in.
It has an 8” Celestion speaker and the manual shows 1 x 6V6GT Power Tube and
1 x ECC83 / 12AX7 Preamp Tube
It has both a high input and a low input.
I stopped playing years ago and at 74 years old I’m starting to sell off the equipment that I no longer use.
Reply with any questions.