new sub horn based on another design

hey long time no realy useful posting from me :P
spent a long while modifying amano's lab 18 design to try and improve it and just made a proptotype of this. it has a larger rear chamber [78ltr ish i think/hope] slightly smaller front chamber slightly smaller throat and most of the expansion is slower till the last segment..... still awaiting amano to reply but he hasnt been online in a long while and i know people want to know more. no publishable plans until ive tested them and am happy you wont lose drivers or be disapointed but when im happy obvously if amano  gives permision the plans will be be made publicly available. any comments welcome, this is just a prototype so mdf no alu for access panels minimal bracing etc happy with first test tho in a garden with no hpf :P
pics.........




http://s1273.photobucket.com/user/bpm_sound_system/media/alkemy%20prototype/46657_463163360429591_915819818_n_zpsc7508153.jpg.html

http://s1273.photobucket.com/user/bpm_sound_system/media/alkemy%20prototype/321358_476752439070683_1005920535_n_zpsfff5cfa6.jpg.html