Accessories James Loudspeaker TK4S-3X14-6
Straight back mounting adaptor, for 2X4 or 2X6 wall construction, works with all PowerPipe subwoofers, except the 1500PTM. The tube size is 4" and has a 180 degree entry. ...
Unit features a 3" x 14" in-room opening and a 10.25" (260mm) clearance from flange edge to tube - generally used for behind wall mounting.
NOTE: The round pipe/tube must be physically deformed and forced to fit the elliptical flange and can be difficult to seal air tight. We suggest you use the TKAD-4-E adapter if you have the avilable depth.