Just picked up this oddball. It actually sounds nice even with Chinese tubes. Decent build with chassis mount tubes, ply cabinet. About 45lb. It appears I have the smaller version with two band eqs, only 2 preamp tubes and no reverb or FX loop, which should have had a Carlsbro-labelled 10" it seems It's got 2 X 12AX7s and 2 X EL34s. Someone modded the baffle and fitted a 12" Greenback, which is pretty new. I've subbed a 70/80 in just out of concern for a 25w speaker's likely lifespan both 16 ohms. This amp sounds good but seems pretty low powered for allegedly 60 watts. Can anyone tell me the standard speaker ohmage? The larger combo with reverb used a 12" Celestion Hot 100 watt speaker. The 70/80 is a pretty efficient speaker. The bigger combo in pics has 16 and 8 ohm external speaker connection. Mine the speaker wires come from inside the chassis. Theres no markings and I can't find any comprehensive specs. Anyone know?