Just Blew my 12" Sundown/tc9 sub.. WOW

[audioholic 5,000+ posts]

This thread sucks hardcore. Just thought you all should know.

 

[Electrodynamic 10+ year member]

Have to throw in some EE here, impedence of an inductor is j*2*pi*f*L, with j=i=imaginary, f being the frequency and L being the inductance, as you can see impedance increases with frequency //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

With everything else being constant, excursion doubles with a decrease of one octave. 20 Hz requires double the cone excursion than 40 Hz. If you're at/near the limit at 40 Hz and you play 20 Hz, your sub goes poof.

PS: In subwoofers, inductance usually decreases above resonance before it begins to increase - especially in the target bandwidth.

 

[Electrodynamic 10+ year member]

Yea I know all this, I was really going to be shocked if the sub didn't go when I was playing with it. Sundown 3kw @ .5 with a solid bass note at 26hz does some damage. The difference is I take all the blame. I don't really care though, the new re-cone will be able to handle it, which in the end it worked out better for me //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

I wasn't pointing the finger at you though. I could tell in your original post that you knew what you were doing. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[bose301s 5,000+ posts]

With everything else being constant, excursion doubles with a decrease of one octave. 20 Hz requires double the cone excursion than 40 Hz. If you're at/near the limit at 40 Hz and you play 20 Hz, your sub goes poof.
PS: In subwoofers, inductance usually decreases above resonance before it begins to increase - especially in the target bandwidth.

Ah, somewhat of an odd phenomenon there. I know subwoofers are definitely not 100% analogous to inductors, but most of it is.

 

[negative3five 10+ year member]

I have 6 tc9's with all dif soft parts and not 1 of them is gonna hold up to 1600watts for a prolonged period of time even the one I just built with 3 stiff spiders and a 8 layer flat wound aluminum coil and thats in a triple stack tc9 motor with basket spacers for extra cooling...

 

[Denhsturrr 10+ year member]

anyone have some tips for a noob on adjusting the knobs on the amp and headunit

and do i need a distribution block if i have a amp hooked up to my mids and getting another mono amp for my subs?

 

[Korn4Life 5,000+ posts]

Everyone on here can Blow me... But anyways the sub isnt BLOW... Actually the coil is fine.. what happen is the spider landing came off the landing in whick it ripped a tinsel lead off its terminal... I will reglue it on and solder the lead and should be good to go.. The glue was to blame.. Its a very weak rubbery kind of glue.. Its not like the HARD CA glue that alot of recones have..... So there ya go

 

[sundownz Pro Seller]

Cool - glad it was a simple thing then.

That glue is actually quite strong - I re-coned an RE MT 18 with it in my SPL truck and played it with 3kw or so pretty well constantly. Glued the spider landing, surround, and dust cap (which is a tough job on the MT) with it. Perhaps not enough was used on that driver //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Korn4Life 5,000+ posts]

It kinda looks like whoever reconed it tryed using two diffrent types of clue,,.. I am in the process of fixing it... The dustcaps also came off a couple days earlier which is a good thing so I can align the coil when i reglue the spider....

 

[dragnix 5,000+ posts]

hold the fckin show......


dragnix is asian //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

that's why you don't even know I'm the one that bought the 80bux camera that you wanted //content.invisioncic.com/y282845/emoticons/sneaky.gif.7189749b3a3f769e8815b47e8ae87f88.gif

 

[jj53913 10+ year member]

Wheres the vid of the HW? I want to see