Jensen Loudspeakers

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Model numbers[edit]


The first character denotes the magnet type used.


The next one or two characters denotes speaker size (8 = 8", 10 = 10" diameter and so on).

The last character denotes the magnet/voice coil size, and directly influences the power rating. The same magnet weights (and corresponding codes) were used on multiple speaker sizes, and the power rating increases with the increasing diameter. Ceramic magnets are roughly 45% heavier than their Alnico equivalents that share the same code.


  • K = Unknown/50 Oz Ceramic
  • N = 29.5 Oz Alnico/29 Oz Ceramic (This is an exception-the Alnico version uses an inefficient ring magnet)
  • Q = 10 Oz Alnico/15 Oz Ceramic
  • R = 6.8 Oz Alnico/10 Oz Ceramic

These aspects together make up the speaker's model number. For example: a Jensen C8R speaker is eight inches in size, and has a 10 Oz ceramic magnet. All Jensen speakers also include a date and manufacturer's code. Jensen's source code is 220. Accompanying the company specific (EIA) code (220) is the last digit of the year and the 2 digits of the week manufactured, creating a 6 digit code usually imprinted on the speaker edge or the magnet housing. Thus a code of 220534 would denote a Jensen speaker manufactured in either 1955 or 1965 on the 34th week of that year. Most speaker (and other electronic component) manufacturers began adding the last 2 digits of the year in the 1970s, so the 6 digit code became a 7-digit code.[3]


  3. ^ "Jensen Date Codes". Jensen Loudspeakers. Archived from the original on 4 November 2013. Retrieved 4 November 2013.

External links[edit]