Lord of the Bass: The Two Towers

In the land of Low Frequency Effects, in the fires of Mount SubSonic, the Dark Lord Ssabripo forged in secret a master subwoofer, to control all low frequencies. And into this subwoofer, he poured his Sonotube, his Avalanche 18" XBL^2, and his will to dominate all audible and palpitable senses in these frequency ranges.

"'One Subwoofer to rule them all...
One Subwoofer to bind them in (flat) FR...
...In the Land of LFE where the Subsonic ranges lie...
These two subwoofers shall reproduce them all!'"


But the conquest to conquer the deepest of frequencies, nay deep into the realms of Minas Single digits, called for the return of the one true heir to the throne of LFE: the quad XBL^2 motor king.


Phase I:
Ok, enough of the cheesy intros..... much more info in the upcoming days/weeks. My partner in Crime Chasw98 and I shall begin construction on the towers as soon as time permits and parts are all here. Thus far, I've decided to go with either a 13hz or 12.3 hz tune, but nothing is set in concrete:


The heart and soul of the project has arrived: a Pair of brand new Ascendant Audio Avalanche 18" drivers....dont ask how I got them or how much I payed for them....just know that I was lucky enough to land them. For about less than one single LMS5400 I was able to land both of these, so as much as I would have loved to be the first to build a pair of large Low Tuned EBS sonotube LLTs (insert favorite acronym here) using the TC drivers, this is a blessing in the sky that such made to fit drivers like these appeared in the sky! heheh.

Yes, the suckers are HUGE, and if the relatively modest AV15 was able to reproduce bass of the quality and magnitude as my DIY box did, I can only imagine what these two towers will do! Some eye candy for you fellas now:



As I finalize the tune point, and get more parts in, and construction begins at Chuck's, we will post it up for you......

Phase II:
with the towers in full place, we decided to go with a quad sealed setup to try how it would differ not only in output, but also what the acoustic differences would be, and what the extension would be.

Please goto Page 32 (click here) for the rest of the story.

hehe...thanks fellas...you guys crack me up.

Most parts are in order....the biggest lagger is the actual 28" sonotube, as it is still a coupl of weeks away

The amp situation is a bit in limbo too as Chuck and I are discussing the EP2500 situation...so we may have to order a new one, or something.

now now Jack....play nice!

surely I wont be able to touch 8 15" tumults with goozles of power and Bassis, variable Q, etc, etc....... But then again, I didn't spend half a mortgage on it

heheh....yes, the amp thing is still in limbo. I'm still eyeing the modded EP2500 as it does a superb job at the price, but I gotta admit that I'm thinking hard about splurging a little and going with this crown K2(what do you think Bosso?):
http://www.crownaudio.com/amp_htm/k.htm

yes, a bit overkill, but fanless design, excellent THD and NR levels, and should be able to handle abuse for years.

ps- oh yeah, as far as I'm concerned, there doesn't exist any 8 tumult sealed systems out there....that's all vaporware .....no pics, no believe! hehehehe. C'mon man, send me that info! it's been over a year now!

Well Stevenn....I'm taking your experience in high regard, as you've gone thru several designs in the last year, and you seem to be the happiest with the Sonotubes in terms of SQ....so this better pan out or I have no problems removing the sonotubes and putting them in a sealed enclosure with tons of power/eq/etc, if the SQ is not where I hope it ends up.


now you are talking! ......but still, you should share some of the goodies with an old friend! The only queues I have are descriptions by Ed Mullen, and visuals by imagining KGveteran's setup x 2 !


patience, perseverance, and contacts thru IASCA/Car audio days....Chad was instumental in all of this.


In my particular case, I got tired of waiting for the LMS5400, and frankly after doing simulation after simulation, and seeing how much better the ava18 does in this alignment as opposed to the 5400, it was a no brainer. For shits and giggles I would love to have been the early adopter for the TC stuff, but this opportunity i just could not pass by!!

yeah, they will be 600L+ each... 6'x28" sonos each.
As I mentioned, tuning is still not final, but I'm guessing I'll probably go with the 12.3 tune, maybe even lower...I modelled the 11hz and it looks pretty good with a slight decrease in overall headroom (barely noticeable) while yeilding good extension near single digits.

My room is not very acoustically friendly, but it yields slightly better gain down low than originally thought...bass traps and so on helped:

that's just one of the many questions I have that I'm waiting to check once I build these things.......as we progress with the completion, and subsequent measurements, etc, I will sure to share it in full detail in this thread.

close, but yeah, you get the picture...they are HUGE suckers:

http://www.htguide.com/forum/showpos...0&postcount=90
http://www.htguide.com/forum/attachm...achmentid=7923