1974 Ampeg SVT 8x10 speaker cab - all original! | Reverb Check it out @JimmyM , @beans-on-toast , and @Bill Hughes : We have seen both flat back and tilt back cabs that date to '74, right? I have a theory. 1974 is the year Magnavox shut down production at the Linden, NJ plant although it still functioned for service and R&D. Maybe the last of the flat backs came out of Linden as the tilt backs were beginning to be made in Jefferson City, TN. Of no small curiosity to me is that this cab has a "300 watts" label instead of "240 wattts". You can't read the first digit but the owner says it could be a two or three, so three it is. I guess that label could be intended for the amp; it gives volts and hertz.