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July 12th, 2010, 07:43 PM
#14
Senior Hostboard Member
Re: What model and year are my A7s?

Originally Posted by
analogmike
Oh that Z Vex IMP AMP is 1 watt, proof of Altec's efficiency claims.
Nice decibal level for one watt! I would agree with Bowtie's estimate of approximately 1969. The last three digits of 391836 (stamped on your woofer) is the date code on your 416-A woofer. The 8 is the last digit of the year of manufacture (1968) and the 36 signifies the 36th week of 1968. So your woofer was manufactured in September 1968--your A7-500's were probably assembled around 1969.....
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