This is a review of a product that I recently purchased and it involves 3 highly respected hobbyist and builders in my book that some of you may already know. Being the owner of a 75L Dayton DVC 12" sub bought from http://www.Acoustic-Visions.com which is owned and operated by a gentlemen and knowledgable Kyle Richardson, I was treated to some of the highest quality bass that I've ever heard My first experience of quality bass was a dual SVS 2531cs setup that a friend of mine currently has and it was then that I knew I had bass issues to tend to. Anyway, I will be buying a home soon and knew that my basement would be much bigger than my present room I have now, in the back of my mind I was thinking of a bigger sub than my 75L sub but figured it would be purchased in the near future. One day while speaking to Rob Lloyd the actual builder of my first 75L Dayton sub,about him creating some DIY ITC's for me he mentioned that he was considering building a new sub for Acoustic Visions and there is no similar offering for it anywhere and would I be interested in hearing about it. I told him to continue and he said well the sub is going to be Octagon shaped but tall like a Sono tube. He said he was working on the technical details with Kyle and said he would talk to me about the project at a later time. Well a few months later I now own a 5 ft tall Octo Sub,with an Adire Audio Tempest driver. I was able to choose the finish that I wanted which was a short haired speaker cover on the main body with the caps being painted in a high gloss black. I told Rob that I wanted the speaker cover as opposed to the paint because it is a big sub and if I did want to move it, the likelyhood of me dinging and messing up the paint would be high since I'm about 5'7". Fortunately, when I brought the sub home I was pleased to see that it wasn't as heavy as I thought and that walking the sub was a far easier task then I expected. Especially for a 214L Tempest sub!! Well anyone who has followed products from Adire Audio knows that the Tempest driver is hard to beat especially when you add in the minimum power requirements needed to push the subs which house them and the overall performance you get. Well I've never experienced such performance before and all I can say is that where my Dayton 75L sub has excellent punch and good low end extension in my room the Octo-Sub would punch you and then throw you from your sitting position much like the girl was thrown from her bed in The Haunting. Ok not literally but instead of punches the sense of being moved does over come you with the Octo sub. The sub is tuned to 16Hz and at a sitting position 8ft away here are some of my early findings as far as Max SPL's go. I live in a NY apartment and had to rush these findings so I will have to take them again this weekend when the neighbors are gone. 20hz = 100 22hz = 104 25hz = 112 28hz = 108 32hz = 115 36hz = 115 40hz = 118 To say I'm extremely pleased is to say the least. It is good to know that I was able to purchase a Tempest based sub achieving bass performance that I would have to pay much more for else where. Wait a minute, I don't know of any other places that offer Tempest based subs TURN KEY!! The customer service offered from Acoustic Visions was equally impressive. Kyle and Rob were always intouch with me during the building process of both my subs and Rob provided me first with digital drawings of the Octo sub and then with actual digital photos before I met him to bring THE BEAST (my subs name) home. He said this was to ensure that we were on the same page as far as the look of the sub and the expected performance. Customer service and performance using high quality parts (thanks to Dan at http://www.AdireAudio.com) and excellent build quality is hard to beat and match at any price. If you're looking for DIY performance at very close to DIY prices you should give Kyle at http://www.Acoustic-Visions.com a visit. Like I told some of those who had questions about my first sub " the main selling point that got me from Acoustic-Visions was while other companies offer awesome products that they sell, Acoustic Visions builds you the awesome sub that you want in the color, shape, size and performance level that you desire. 2 thumbs up with a twist of lemon!