https://minneapolis.craigslist.org/hnp/ele/6196687082.html
"I have four solid oak klipsch chorus II speakers for sale. $400 each, $775 for two, $1200 for four"
Rev.1 – Start of Production in Spring of 1994
These models had 5" long port tubes
Networks used OFC (monster cable looking) clear jacket wiring.
Horns in these models were gray in color.
Rev.2 – Fall of 1994
These models had shorter 2.5" long port tubes (to raise the box tuning)
Networks had a component / value change to correct for the new ports. (The network wire was still the OFC used in Rev.1.)
Rev.3 – Summer of 1995 to end of production in 1996
These models had new lighter cone woofers (new vendor) (these cones aren’t nearly as stiff as the originals and can be deformed much easier by pressing on them)
Networks were changed to compensate for the new woofers
Change in network wiring to colored 16ga. like what is used in Legend KLF networks
New horn material that was 20% glass and was painted black.
Serial number decoding for EPIC Series models (or any Klipsch model made from 1990-1997(?))
Production Years Description Example
1990-1997(?) DOY Y2Y1 # # # # (135791234)