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Klipsch Date Codes

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Consulting has been good this past year, so I am living my dream and have purchased several Heritage Klipsch speakers. The oldest is a perfect pair of 1971 Heresy speakers signed by PWK with clear plastic badges and accompanied by a Thank You Letter from Anna Belle.

Q: Where can I buy a book, or some other document that will explain the Klipsch assigned date codes via serial number? I'd like to determine the manufactured date for each. How do I break down the serial number date code?

Best Regards,

Gary E. Shroyer

Owner of 4 La Scalas, 4 Heresys, 2 Heresy IIs, 2 Forte' IIs, a pair of Klipschorns and some Bob Crites build em' up parts!

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001 (ending #021)
0121 (starting #0121)
YY WW ####
DOY Y2Y1 ####
YY WW ####

1962-1983 Letter format

A = 1962 F = 1967 K = 1972 R = 1977 X = 1982
B = 1963 G = 1968 L = 1973 S = 1978 Y = 1983
C = 1964 H = 1969 M = 1974 T = 1979  
D = 1965 I = 1970 N = 1975 U = 1980  
E = 1966 J = 1971 P = 1976 W = 1981  


1946-1961 dates can only be found in log book (eng. Library)

DOY= day of the year
YY=year (i.e. 99,00)
Y2Y1=2nd digit of year, 1st digit of year
WW=week of the year

Date code on drivers (1994) Example - 9429 = 1994, 29th week of the year / YYWW

Klipschorns of this vintage had the s/n hammer stamped into the tailboard, woofer access door or inside the woofer chamber.

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  • 16 years later...
13 hours ago, memyselfandi said:

I don't know what I am being directed to do or say here, a bit strange, simply wanted to find manufacturing date for my rf7ii's but if you don't want to assist me please let me know so I can start looking elsewhere. 

Should be the first two digits of the serial number.

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On 4/22/2024 at 9:08 AM, memyselfandi said:

Anybody know how to figure out th s/n of the klipsch rf7ii speakers 101184110340030 thanks 

@memyselfandi I believe it's the same as the RF-7 IIIs, the first 7 digits are the colour part no., Black Ash or Cherry, the following 2 digits are the Year 2010, next 2 digits are the Week 34 & the last 4 digits are the production "batch" code, there would be a preceding 0029 & succeeding 0031, anyway it looks to have been built between August 23rd-29th in 2010 :)

Edited by Oniiz86
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  • 3 weeks later...

looking at a set of cornwalls, SN's 168753 and 168734--    It doesnt seem to line up with the chart, the format points toward a 1990-1997 range but that does not make sense     

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2 hours ago, MrT58 said:

Best I can get, the mod to the binding posts are due to have crites crossovers according  to the seller.   Its a couple hour drive so not able to see in person.





The “8” is actually an S.

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