Woofers with a low Fs?

[Nukedsodapop 5,000+ posts]

Just wondering, I saw the Brahma thread and it said 18 and thats the lowest I've seen, any others?

-Blake

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[JimJ 5,000+ posts]

The older Avalanche had an Fs in the 16Hz range, I believe.

A low Fs isn't everything.

 

[Raven 10+ year member]

Considering some companies add mass to the cone to get it..

 

[AndonD454 10+ year member]

what other parameters have a big affect on LFE? like what would one look for if they wanted a low end monster

 

[Nukedsodapop 5,000+ posts]

Thats what i was askin, what are the low end monsters?

-Blake

 

[tRiGgEr 5,000+ posts]

A lot of people recently are trying to pick out one spec and use it as a guide to the speakers performance. This is a bad idea. As the Xmax, FS, SD are all single parameters that effect a minimal part of the performance. They have to be looked at as a whole IMO. And just one spec should not be a factor used to purchase.

Real world results and the way companys rate their equipment will always be different.

 

[OneKrazyKeebler 10+ year member]

A lot of people recently are trying to pick out one spec and use it as a guide to the speakers performance. This is a bad idea. As the Xmax, FS, SD are all single parameters that effect a minimal part of the performance. They have to be looked at as a whole IMO. And just one spec should not be a factor used to purchase.
Real world results and the way companys rate their equipment will always be different.

Not sure if I have ever heard someone sum it up like that. Exactly what I was thinking.

 

[DBfan187 5,000+ posts]

mms, Le, SD, Vd, Xmax, Fs, and others.

 

[Chevyaudio 5,000+ posts]

Yo! i wants a woofer with 24 inchez of exkurzion fo real

 

[Nukedsodapop 5,000+ posts]

I wasnt looking to buy, i was just asking what some woofers with a low Fs were, I didnt say " Hey look guys, I wanna buy a speaker off of one spec"

-Blake

 

[vladd 10+ year member]

i want to say my ava 15 is in the 15hz range beware though, this creates a problem with tuning your ported boxes, you have to tune lower which means more port which means even bigger gross box volume.

 

[squeak9798 5,000+ posts]

This is what Stephen Ponte (former engineer for TC Sounds) had to say about this very question on another forum a couple years ago;

Things that dictate low frequency response:

Environment - usually, a vehicle's transfer function offers a HUGE boost in the sub-bass region. Typically, a 20dB natural boost @ 16Hz.

Enclosure - in a car, sealed will ALWAYS play lower than a vented enclosure. Typical sealed box woofers have no problem reaching down to 10Hz flat, in car.

Driver: Fs is NOT a huge determiner of LFE. Qt is. The higher the Q, the lower the woofer will play - always. The more moving mass, the lower the driver will play (relative to Q). Less BL product (relative to Q). Etc etc etc.

Excursion - will my driver have the ability to move enough air to play that low? Remember, in a sealed environment, or IB (etc), the lower the speaker plays, the more excursion is needed.

Cms, or compliance usually has VERY little to do with how low a speaker will play. Now, keep in mind, that the lower the Fs of a driver is, the lower the Q is - and remember, a high Q always plays lower. So, a low resonance speaker isn't always good.

There is NO way to look at driver specs, to know how low a driver will play. You can get a good idea by looking at the Q. But, the BIGGEST factor of LFE, is environment. And, unless you map your transfer function of your vehicle, you cannot say that X driver will play down to Y.

Just a thought.

http://www.elitecaraudio.com/forums/showthread.php?threadid=87543&pagenumber=2

 

[skmfkr 5,000+ posts]

pg cyclone

 

[AndonD454 10+ year member]

good post squeak thanks

but now that we know whats behind it.. could anybody throw out a few woofers that provide a good example of this? im glad this post came up cause im in the process of looking for a woofer that will give me good super low output

 

[DBfan187 5,000+ posts]

Xxx