Did the OP ever say where he saw the video or a picture? I don't know where or when, but I posted a video or pictures of a Tapped TL for a pair of DDW6.5's made for a CRX, relatively flat from 38-75Hz at the headrest. If that was not it, he could have seen an application with a W6.5 loaded in a RLH? If he said where he saw it and it's neither of those.......my bad. I've definitely built a bunch of setups with W6.5's, from Tapped TLs to TTLs to Bass Reflex to 8th order bandpass to RLHs.