Soft parts make subs take more power.

[iLL Ridge 10+ year member]

Wait a minute though... what makes the two woofers in your(Jacob's) post different in terms of loudness? If they both have the same sensitivity? Are you talking about louder at max amplification? Or louder with a given watt input, i.e. 1w/1m???

Because if they both have the same sensitivity, isn't that the meaning of db@1w/1m?

 

[l7runner 10+ year member]

Wait a minute though... what makes the two woofers in your(Jacob's) post different in terms of loudness? If they both have the same sensitivity? Are you talking about louder at max amplification? Or louder with a given watt input, i.e. 1w/1m???
Because if they both have the same sensitivity, isn't that the meaning of db@1w/1m?

As he stated sensitivity values are typically rated at 1000Hz. The speaker's response at lower frequencies will be much different, therefore this value is irrelevant.

 

[Kyle_Keating 10+ year member]

Super stiff suspension are nothing more that mechanical limiters, they don't make subs "take" more power but rather they limit excursion if too much is applied by evoking a restoring force of similar magnitude to the BL(I) applied on the voice coil This can only work if the spiders are strong enough to withstand that kind of stress therefore you need lots of them. In other words, they reduce your excursion when you otherwise may have pushed the woofer too far. They don't improve your SPL and they do add distortion, but they may be necessary in preventing damage. Other ways to do it are as mentioned: limiters or just filters which can wokr better because they stop the signal and prevent not only mechanical damage but thermal damage. Limiters are more expensive and complex. You can also open the the gap on the voice coil and eliminate former collisions with the t-yoke under high power or make electromechanical braking systems on your voice coil such as a shorted aluminum turn above the coil or use a motor like the JBL DD. Limiters are possibly the best solution but the most complex and require a well designed closed loop system which is not generally found in car audio installs. Compliance stiffness is not a variable in small signal SPL but it does affect it in the large signal domain - Klippel results can reveal this behavior.

 

[iLL Ridge 10+ year member]

Roger dat.

 

[sundownz Pro Seller]

Wait a minute though... what makes the two woofers in your(Jacob's) post different in terms of loudness? If they both have the same sensitivity? Are you talking about louder at max amplification? Or louder with a given watt input, i.e. 1w/1m???
Because if they both have the same sensitivity, isn't that the meaning of db@1w/1m?

The second driver has a better ratio of motor force factor to mass -- despite have an identical sensitivity.

It would be louder at all power levels.

My point was, in fact, that sensitivity is pretty irrelevant to subwoofers -- even for SPL applications.

 

[sundownz Pro Seller]

Compliance stiffness is not a variable in small signal SPL but it does affect it in the large signal domain - Klippel results can reveal this behavior.

Very good point Kyle -- we've measured dramatic SPL difference is spiders due to this fact.

Many folks don't consider that compliance changes with excursion -- especially with many commonly used spiders as it helps to prevent damage.

 

[E2theloc 10+ year member]

a sub with higher sensitivity will generally be more sound quality oriented. Softparts include the sipders. having a massive amount of stiff spiders will decrease sensitivity but increase rms capabilities. having less spiders, soft or medium, will increase the sensitivity. the coil aswell plays a big role in sensitivity. a LMS coil is the best for achieving a higher sensitivity while being able to handle plenty of power

very well decribed

 

[SPLaudio 5,000+ posts]

matching spiders with coil and motor along wiyh power being applied is very important.

more spiders dosent always make the sub handle more power. the more you limit cone movment ur also reducing thermal powerhandling...

 

[MayzDayz]

My girlfriend has some nice soft parts as well //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

Can we see

 

[Popwarhomie 5,000+ posts]

Can we see

10 year old thread bump for that shit???

 

[hispls 5,000+ posts]

Can we see

Joins the forum to necro a 10 year thread by asking for noods.
Thanks for your contribution, friend.