I have been into home theater for many years and have gone through a plethora of consumer products from cheap $25 Sony bookshelves to decent Polk mains. The most expensive consumer subwoofer I owned and still use in a different setup is a Rythmik LV12R. For almost 600 bucks I was never really impressed with the output, dynamics or quality of sound even after tedious tweaking. We sealed it, bypassed the silly servo technology, EQ'd the heck out of it and it still never gave me what I was looking for out of a subwoofer. Especially after experiencing
subs in person...
Thanks to this forum and
I decided to go the DIY route as it is cheaper and more efficient. Man, did that prove to be true with the monster we have built here. From this day forth I will probably never buy consumer products again. DIY is certainly the way to go for me. It took some time and elbow grease but I now have a subwoofer that trumps any consumer sub even close to what I paid for the materials, drivers and amp. This dual 18" setup was discussed and debated for years before I finally decided to pull the trigger. The trigger was when the new HT-18v2's from Stereo Integrity were released at $149 each! I immediately bought 2 and got the ball rolling. I have to give a huge thanks to Nick at Stereo Integrity for the incredible deal and awesome customer service. The quality of these drivers are top notch and as he told me, nowhere on the market can you find this much displacement for the dollar.
Now that the project is complete I can say I am finally satisfied with my subwoofer setup. In my small living room I couldn't ask for more. The output, dynamics and response is incredible. It has made me re-watch most of my collection of music and movies in a whole new light. This new setup has given me a much more immersive experience with everything I play. I now know what ULF truly means and how important it is for immersing yourself in whatever material I am watching/listening to. I have to give a huge shout out to
for helping me build the enclose and
for the design.
More pictures of the completed project and videos of excursion measurements will be coming soon.
Breakdown of the cost of the entire system including the amp.
The cabinet uses 1-1/2 pieces of MDF with minimal cuts due to leaving the 4 foot side alone for all of the sides of the box. The internal volume comes to 13.72 cubic feet and after drivers and braces comes to about 12 cubic feet.
WinISD model of both HT-18's sharing 12 cubic feet:
Excursion graph using iNuke 6000DSP as the amp:
Close mic average of top and bottom drivers in the middle of the room:
Cabinet was assembled with no fasteners:
Listening position response with mains (mic used was the UMM-6 so measurement isn't too accurate much below 20Hz):