This is someone that has really lost his mind. Then again it is those crazy people that end up with the big money. Well, maybe not.... If this is a VDF member, please come forward! Ebay Item #150360483835 [FONT=Georgia][SIZE=5][COLOR=#ad001f]Slingerland/Custom Variable-Vent 18" Floor Tom Prototype[/COLOR][/SIZE][/FONT][FONT=Arial]This is a semi split-shell 18" floor tom designed to incorporate a variable area vent in the manner of a bass-reflex speaker enclosure. The variable area vent allows reinforcement of a fundamental frequencey of your choice as the environment and/or musical selection demands.[/FONT][FONT=Arial]The shell halves are secured by means of a second set of 4 chrome legs and the dimensional polypropylene reflector is held integral to the shell halves with a modified Rogers "clutch"-type muffler assembly and lubricated sliders at the edges.[/FONT][FONT=Arial]The vent is adjustable from 0" to ~5.5" in width by approximately 180 degrees in circumference. Initial tests indicate that the 5.5" vent most effectively reinforces about a 40Hz fundamental with smaller vent sizes reinforcing progressively higher tones.[/FONT][FONT=Arial]The maple shells, Sticksaver rims and lugs are all vintage Slingerland and are in good shape. [/FONT][FONT=Arial]Top head is a virtually new Pearl Pro-Tone and the bottom is a clear Remo that could use replacing.[/FONT][FONT=Arial]Hopefully the pictures will tell the story better than I can![/FONT][FONT=Arial][SIZE=2][COLOR=#fb0034][SIZE=4]This drum can reach some AWESOME LOWS!!!!![/SIZE] [/COLOR][/SIZE][/FONT][FONT=Arial][SIZE=2]I am currently analyzing a second iteration of this drum in an anechoic chamber with a sweep freq. analyzer and decided to sell the prototype to keep the project funded.[/SIZE][/FONT]