This document is meant as a reference for when you are browsing the classifieds or eBay and is not meant to list every little detail about the speakers.
However I feel the speaker (which is more than likely the biggest area Marshall saves us and them money) needs attention.
The reason you usually don't actually need a wiring diagram to install a car stereo, even if it's a second-hand unit that didn't come with any paperwork, is that aftermarket car stereo wire colors are actually pretty uniform.This tells us that this is an Oxford speaker (465 is the number for Oxford, 137 is CTS, 220 is Jensen and 328 is Utah).
Magnavox in turn is the original Peter Jensen speaker company.
Stocking replacement speakers from, Electro Voice,Goldwood,Eminence,Jensen,Pioneer and more.The only date codes that seems to be readily available is found on the speaker magnet located under the bell cover.Our classic car stereos, speakers, and other audio products for Cadillac are custom kitted for your specific year.Some guitarists feel that a 15 Inch speaker is the only way to get an instruments true tone.
Specializing in Vintage and Antique Speaker Repair,Recone and Restoration.The Speaker Shop is a Factory Authorized Repair Center, stocking over 20,000 parts.Speakers that were previously Magnavox show up with CTS 137 codes circa 1962.
The history of the Vox amplifier line is inexplicably tied to the fortunes.and misfortunes.of the succession of the eight UK firms that have owned the Vox marque since 1957.Look at the digits after the week to see the day and possibly the hour the speakers were made.This list is circa 1955, and some codes have been reassigned or added since that time.