May have been asked before, or may be in here somewhere, but I haven't found it - so here goes. I've recently acquired a Beta Bass combo that was reportedly owned by songwriter musician Mickey Newbury and was in is famous "Old Lake House" for the last 30 years or so. The amp didn't work and had 2 broken off pots. The speaker was bad as well. Alpha Sound has the amp going by repairing the power amp, preamp and replacing the 2 pots. I took the speaker to the Speaker Medic and he can't figure out who made it for rebuild parts. So, any idea who manufactured the stock 15 for the Beta Cab? My thanks.