My tube guru sold me this amp. I haven't looked back since I purchased it. Awesome bass tone. I currently run one 15" 8 ohm cabinet and a 2-10" 4 ohm cabinet with no problems whatsover (not sunn). Any bass plugged in sounds great. SVT tone and 30 lbs lighter. I
have been told this amp was made around 1968. Definately worth listening to.