Subs with tall roll surrounds/ recone kits

[ciaonzo 5,000+ posts]

Great post.
Sell me your avatar. //content.invisioncic.com/y282845/emoticons/drool.gif.b5e863e893038027711d4402f340dad0.gif

About tree fiddy.

 

[bernser1er 10+ year member]

aren't high roll surrounds intended for 10'' suspension ? any thing smaller than a 10'' spider your not getting full use of the high roll surround ?

 

[Dak446 10+ year member]

null

 

[ciaonzo 5,000+ posts]

aren't high roll surrounds intended for 10'' suspension ? any thing smaller than a 10'' spider your not getting full use of the high roll surround ?

See the pic of the OEM 10" doing 3"+. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif It wouldn't happen with a half roll that would allow for the same cone area.

 

[bernser1er 10+ year member]

what size and type of spider does the oem use .i believed my old la storm neo 10'' subs were just shy of 3'' because they only use 8.4'' spiders thanks for the info. i like to learn new things every day !!

See the pic of the OEM 10" doing 3"+. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif It wouldn't happen with a half roll that would allow for the same cone area.

 

[ciaonzo 5,000+ posts]

what size and type of spider does the oem use .i believed my old la storm neo 10'' subs were just shy of 3'' because they only use 8.4'' spiders thanks for the info. i like to learn new things every day !!

Yep, the OEM uses an 8.4" spider with a 3" coil.

 

[SPLaudio 5,000+ posts]

i consider that a big gap. a tight gap would be .5mm per side...

 

[ciaonzo 5,000+ posts]

I would have to agree. And most drivers with a gap like that do not travel as far so a high roll would most likely be out of place anyhow. A half roll could easily cope with it and provide a reportedly more symmetrical Cms plot. Still, I would like very much to see the hard evidence for the supposed non-linear restoring force that a high roll provides in relation to mm of travel.

 

[mendon mafia 10+ year member]

I would have to agree. And most drivers with a gap like that do not travel as far so a high roll would most likely be out of place anyhow. A half roll could easily cope with it and provide a reportedly more symmetrical Cms plot. Still, I would like very much to see the hard evidence for the supposed non-linear restoring force that a high roll provides in relation to mm of travel.

Wow lots of great info in this thread, glad i made it. Thanks guys for the informative debate.

but yea i still want proof or numbers showing this non linearity, just so i can see how big of a concern it really is. until then I see no arguable downside to going tall unless the excursion of the driver doesn't require much surround.

And **** those pics made me jiz a little lol. i want some tc subs.

 

[mrogowski 5,000+ posts]

Thanks.
Yeah, I need to be better about the way I articulate things. I shouldn't say that there isn't any coil rock at all, rather there's not enough for the coil to come in contact with either the top plate or the T-yoke when approaching the extremes.

I hope that will please anyone who may have thought I was making an absolute statement.

A laser pointer serves very well to show any lateral deviation and yes, under very demanding excursion you can just appreciate that there is some tolerance for the coil to move about within it's stroke. But again, it's not coil rock that's at the heart of the debate, it's compliance versus X. The force applied by the surround is said to be non-linear but no one mentions at what distance of travel this holds true. Someplace I have a graph which depicts the Cms plot for a high roll surround in relation to up and down travel and the line is virtually straight. Whether or not that's marketing magic at it's finest, I don't know. They say it was designed using FEA so how bad could it really be?

Agreed, and I'm certainly not nit-picking either //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif Yeah there are some pretty elaborate solutions one can use to identify anomalies. Using a strobe is cheap and readily available.

Find those plots and post 'em foo //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[SPLaudio 5,000+ posts]

the tc sounds woofers pictured are still some of the biggest excursion subs still of today. they are ment for sql with deep impact.

for spl subs high roll isnt always the best...

 

[thorshammer1 10+ year member]

Based on theory and calculation, it definitely looks pretty supporting. All we need now is someone to to take a single driver and meter it with same coil, motor, power, etc with the only variable being the surrounds and see if the extra cone area does anything //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

I will be doing this very thing shortly. With the half roll surround I have given a best of 151.6.

I will be testing this

 

[mendon mafia 10+ year member]

I will be doing this very thing shortly. With the half roll surround I have given a best of 151.6.
I will be testing this

your subs are actually what sparked my interest in this whole thing. Did DC do that custom for you or is that a standard surround they use? didnt you pull a 154.xx on tones or something or was that with the aq's?

 

[thorshammer1 10+ year member]

your subs are actually what sparked my interest in this whole thing. Did DC do that custom for you or is that a standard surround they use? didnt you pull a 154.xx on tones or something or was that with the aq's?

I could only dream of a 54 legal:laugh: I did do it ala Texas Bass Wars Style in kick and did a 54.6.

This is just a test to see if the taller surrounds will eliminate the surround shredding party. lol So far everything else is like new even after some serious testing. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[mendon mafia 10+ year member]

I could only dream of a 54 legal:laugh: I did do it ala Texas Bass Wars Style in kick and did a 54.6.
This is just a test to see if the taller surrounds will eliminate the surround shredding party. lol So far everything else is like new even after some serious testing. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

didnt realize it wasn't legal, going off memory tho getting the 154 was pretty close lol.

Cant wait for some numbers.