Thumpper

that's a first generation Icon..... NICE.....

I had a Crown GTI....... best sub amp I have ever owned or even listened to period but when they break down they are disposable.... JBL worked on mine for 2 months and bought it back because no available parts for the repair and I ended up with some Soundstream Reference amps with the little cash they gave me

the Mosconi Zero One for my subs.... I have a buddy who owns one it has BY FAR the best woofer control I have heard in a LOOOONNGGGG time.... http://mosconi-system.it/product/zero-1/

I'v seen it happen.... the coil SLINKY's off the former and makes a rats nest in the gap just a guess I'd say the sub was over exerted and came back into the gap out of alignment... I had a Soundstream Rubicon 12" that did that very well... I cut the surround and spider loose and had to stand on the motor assembly while twisting and pulling on the cone to get it out

the only time I want to see anything like this is on video when someone else pays for it.... LOL that poor Nitro is going to be a rattling piece of shit in no time..... nice flex though

also doing abandonments of house services.... with these I weld a steel plug on the tee branch with an acetylene torch you wanna talk small holes.... I'm 6"2 and have to fold in half sometimes

working on Natural Gas Pipelines , weld repairing hit lines , plastic fusion on PE and helicopter drops on mountainsides.... never a dull moment repairing a hit 4" live gasline a 10" high pressure gas line plastic fusion tie in between a 4" PE and 2" PE line a 2" PE gas line and a service tee going to a house

it's all done by X-Ray and the distribution lines are tested with air on a clock high pressure is hydro tested .... line pumped up with 2200psi of water

If I fuck up on a high pressure line There would be a crater with a bunch of burnt shit in the middle taking up about 3 square blocks no biggie.... LOL

The high pressure line is about 1200 psi the distribution lines are 62 psi i have welded stopper fittings on 500 psi ... they dropped the pressure for me can't say I wasn't nervous with those i had a Muller ignite because of a leaky valve about 3 feet from me when I was running a root pass on a transition and got hosed down with a dry chem

a D7 Cat holding an excavator on a mountainside ... so steep in places you had to crawl up we had 900 meters of 1.25" cable ... 1800+ feet

JFYI ...you can stick a piece of tape to the dented dust caps and pop the dents out....

Frankie Goes to Hollywood the extended version of Two Tribes as some nasty vision blurring bass.. I use it as a demo song all the time

those songs have bass from the original recordings Dirty Diana flexed the dash and drop it about 3" in my ground pounder with the four 15" Xcons on the Crown A3000gti..... that van was a piece of shit when I was done with it.... a good percentage of the body spot welds were ripped loose mostly from old 80's stuff

I am only running 84 sq inches of port area for my two 12" JBL W12GTI's.............

those old Icons really got down I remember burping a 144db at 10hz with my four 10" at a comp a few years back... left everyone with that WTF look on their faces

I would run a pair of 12" if they were the original design with the non sandwiched leads , black spiders ...only change I would want would be the higher rolling surround

I had a similar problem once my four 15" Xcons ripped the brackets for the electric motors on the side rear windows in half.. I had to get the manual latches from a wrecker and tighten up the adjustment almost enough to break the glass to stop them from flapping on the low notes

my last metering with the original Icons was 143.6db @ 10hz...... WITH FOUR 10"........ on a Crown A3000gti that set up was so flat the output only varied 3db from 10hz to 35hz.... the flattest response I have EVER seen with ported subs still KICKING myself in the ass for letting them go the only thing I would have changed on them would have been the surround... I was ripping them off the cone I would have went with a higher rolling surround and called it a day.... awesome woofer

I had four 15' Xcons in my last install..... you could feel the bass for almost 3 blocks away and they DESTROYED my Ford Windstar... those things hit HARD

I am supprised the Kerf didn't split with the direction of the grain.... it would bend a bit easier with the outside grain going horizontal.. still a nice build though

I totally agree ... LOVED my first run of Icons ... smooth with outstanding low end extension the newer version left me diss appointed nice design , I bet that cap really improved things

very well said............. I am now going to go listen to that abortion of a sub amp that I have installed in my system.... UHGGG!

I do not pay attention to the rule of thumb..... I think it's bullshit........... I use what ever port area gives me good port velocity I refuse to build an enclosure that creates port noise