Turbosound TSE-218 reverse firing flyable touring cabinets. Original drivers have been replaced with RCF L18S800 drivers, which tightened up the low mids.
I purchased these from a Boston-based touring production company around 20 years ago, upgrading from JBL SRX728 subs at the time. These offered a smaller footprint for a premium dual 18" folded horn sub cabinet.
These subs are highly efficient (105dB at 1W/1m), tight, punchy, and loud (136dB peak). The cabinets are in excellent condition with a few minor scratches. They have been lightly used and stored in a climate-controlled facility. Complete specifications and cut sheets are available upon request.