View Full Version : Subwoofer Stretch?

12-13-2007, 06:01 AM
800w rms clarion mono.
2x 400w(i think) pioner single cone 12

how far should the speaker rubber actually push out? ive heard it usually should be just under an inch?

any suggestions?

12-13-2007, 06:06 AM
depends on the sub and how it was made...

12-13-2007, 05:36 PM
what the hell type of question is that????

12-13-2007, 05:55 PM
find the t/S parameters on your sub...the xmax marks its max excursion

12-13-2007, 05:58 PM
single cone??

there can be two cones at a time?

12-13-2007, 06:04 PM
^^no, thats coils

12-13-2007, 06:06 PM
find the t/S parameters on your sub...the xmax marks its max excursion

For a competent driver, Xmax is linear travel of the coil, but the woofer's suspension can go farther. If I was designing something for a downfiring app or anywhere where surround clearance was important, I'd look at Xmech, which is the maximum mechanical travel the woofer can sustain, before something fails.

12-13-2007, 06:10 PM
^^i know, but if hes asking such a question i seriously doubt he has the knowledge/power to move it that far, and i think ull agree thats not very healthy for the driver

12-13-2007, 06:12 PM
I'd say it's easier to send a driver into overexcursion by not knowing what you're doing, versus actually keeping it within the recommended :)

But yes...sending it beyond linear limits for an extended time is not very good.

12-13-2007, 06:17 PM
true, overpowering and bass bosst+18, EQ+max and all that...anycase, dont think it will ever reach that point...maybe with twice the power he has...maybe

12-13-2007, 07:14 PM
^^no, thats coils

thats what i thought.

12-13-2007, 07:20 PM
2 x 400w subwoofer.. makes perfect sense to me..

12-20-2007, 02:33 AM
Soz if im a lil uneducated when it comes to the matter but anyway
they are 2 pioneer TSW-305C subwoofers in SEPERATE boxes

Now i do know that you shouldnt use bass boost or any other crap like that. My gain on my amp is about a quater of the way and everything (bass, low, subwoofer etc) on my HU is set to the middle = 0 not -6 or anything that centre.

Where do i find this Xmax? i bought the subs a while ago and dont have the manuals for them anymore.

The rubber (ring i guess) around the subs push out about 1-2 cm. any further than that and i think im going to break them. They do seems to get to a certain point where if i do put the volume up the vibrate more (rubber pushes out ridiculously) and the bass isnt hitting any harder

My concern is they used to seem to punch alot harder, do subs get old and loose strength or just blow up?or could it possibly be the box having gone a lil loose after a while?

Any recommendations?

12-20-2007, 11:03 AM
From a quick search on google. . . . . . it says your xmax is 9.2mm

12-20-2007, 11:19 AM

here's a link to the sub on pioneer's website. im sure you can find the manual on there as well.