Until such time that enough information is available to date 1970s Ampegs by serial number, the features of the amps from this period can be used and compared to the following table. An added variable is that during the Magnavox years, Ampeg may have used separate serial number systems for each model or for models that shared the same chassis like the VT-22 and V-4. For more precise dating cross reference the serial number with the amplifier's transformer, potentiometer, capacitor and speaker codes. Some examples of 1971 SVT serial numbers are 10254x and 10590x. Ampeg serial number dating is undocumented and very difficult. Note that Fender did not use the L rated speakers (but Ampeg and Leslie. Serial numbers on the speaker cabinet were stamped into a metal plate on the back. What I doknow is this rig sounds greatin a modified Marshall kind ofway. Tilt back legs with serial numbers were used only on the speaker cabinets of. While I vaguely remember thesefirst coming out, info on them seems pretty scarce. It’s in excellent conditionand still has the original tubes. For over 60 years Ampeg has been providing amplification solutions for professional bass players and aspiring bassists looking for the best bass practice amps. The original owner hardly used it, and the rigspent most of its life in his basement. Not enough information was available to the authors to determine year of manufacture by serial number. Ampeg is a Bass amp instrument manufacturing company that specializes in bass guitar amplification and effects. The third serial number system was implemented in 1970. That's an older version if it has four rocker switches for frequency and no 'distortion channel.
