An acquaintance who used to own a speaker favorably reviewed by Stereophile some years ago told me that Wilson Audio used to use 18" JBL woofers in their WHOW (Wilson High Output Woofer) subwoofers. Here is an ad in USAudiomart of an original WHOW and the driver certainly does appear to be a JBL. Maybe the 2242? I understand they changed to a 15" Focal in later models.

If someone knows how to grab the pics for posterity, that would be great!

https://www.usaudiomart.com/details/...ofer-with-amp/