The high-quality flip-top, double-baffle cabinet is covered in black diamond Tolex and factors heavily into the amazing tone of the iconic original.
The code usually consists of 6 or 7 digits such as 137634 where the first two or three digits is the EIA code for the manufacturer (137 denotes CTS), the fourth digit and sometimes fifth digit denotes the year (in this case it could be 1956, 66, or 76), and the last two digits denote the week of the year.
It is important to note that parts do not always contain EIA codes, especially those parts from the late 1940s and early 1950s.
Check out the ultra-affordable Portaflex Series, delivering the legendary B-15 vibe with a selection of all-tube and lightweight, solid-stage designs with modern features. The Heritage B-15N features distinct 19 channels, plus Ampeg’s flexible Baxandall EQ and selectable bias modes for ultimate tone control.
A., the Heritage B-15N delivers the sought-after B-15 performance in a new, all-tube design featuring reliable PCB architecture and a beautiful black finish.
Unfortunately, the serial numbers are of little help for dating one of these pre-Ampeg models and EIA date codes on components were used sporadically during the early post WW-II years.