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Numbers printed on the basket of this speaker: P12C6641, 50948, printed on the top of the magnet: 220121 (= date manufacturer code); Model: P10N C6907 2, D613 024675 C, printed on the rim of the basket: Magnet: Alnico (large!
There are two kinds of NSX owners: The guy who buys wiper fluid from the Acura dealership and drives the mid-engined supercar every chance he gets, so long as it's between May and September with zero chance of precipitation and a UV index of less than five. He had his Prelude turbocharged in '93 before Preludes were supposed to be turbocharged.
" And if your speaker is in reasonably good condition, then it is straightforward to find this out for yourself.Since 1956, all Celestion chassis drivers have been stamped with a date code (two numbers and two letters), denoting exact date of manufacture.The codes are added on the production line and are placed on the speaker's chassis leg, on the front gasket or on a label on the magnet edge.One alternate scheme is: 274 940 274 is the EIA code (RCA) 9 is the last digit of the year (in this case 1949).
Usually single digit date codes are from the 1940's, but have on occasion shown up in later decades, even up to the 1970's.
Q: What are the wiring options and impedance loads for two speakers?