really efficient subs

[dakotus 10+ year member]

Depends. Hoffman's Iron Law....you can only have two of the following three:
1) Low frequency extension

2) Small enclosure

3) High efficiency

So, you can see that, by default, as you increase sensitivity you must either increase enclosure size or decrease your low frequency extension. No way around it.

Hopefully you can see why most car audio subwoofers have such low efficiency figures. For car audio, we want good low frequency extension out of a small package....and therefore, efficiency must inherently suffer.

So, higher sensitivity isn't necessarily or inherently always a good thing //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif Depends on your goals and application

http://cgi.ebay.com/Image-Dynamics-IDW15_W0QQitemZ5838995426QQcategoryZ18804QQrdZ1QQcmdZViewItem

that kinda covers all bases

 

[squeak9798 5,000+ posts]

http://cgi.ebay.com/Image-Dynamics-IDW15_W0QQitemZ5838995426QQcategoryZ18804QQrdZ1QQcmdZViewItem
that kinda covers all bases

The IDW's are awesome.

But not small box woofers //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif They don't, can't, and will not, defy Hoffman's Iron Law. Why do you think everyone either runs them IB or in insanely large enclosures (~7cuft+) //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[dakotus 10+ year member]

yea, but they only require 1.5 cuft.

I guess it depends on what is a "Small Box"

 

[melnlovr911 10+ year member]

nobody mention the Memphis M3's?

 

[squeak9798 5,000+ posts]

yea, but they only require 1.5 cuft.
I guess it depends on what is a "Small Box"

No, they require more than that for good low frequency extension.

You can use them in a 1.5cuft enclosure....but you won't get much low end extension. Again, look at how people actually use them. Infinite baffle or very large enclosures.

 

[dakotus 10+ year member]

bah humbug

you and your HassleHoff law

//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

 

[redlinese-r 10+ year member]

i still want another cerwin vega vega series....but yeah, that hoffman's law it true. example: the cerwin vegas i talk about have a sensitivity of around 94-96 db's (which is high) and they offer low extensions, but require a rather large enclosure: the 12" requires a 2 cubic ft. enclosure and the 15 i think around 3-3.5(?) cubic ft.

compare that with an old school round s12/15d solobaric. can use a rather small enclosure, offers low extensions, but the sensitivity is around 89 db's...

so there you have it.

 

[adio 5,000+ posts]

u can try this

http://forums.caraudio.com/vb/showthread.php?t=132478

 

[wilzyx 5,000+ posts]

do elemental designs subs **** or does everybody just hate the guy that runs the company?

 

[squeak9798 5,000+ posts]

do elemental designs subs **** or does everybody just hate the guy that runs the company?

Mainly just hate the guy that owns the company.

 

[wilzyx 5,000+ posts]

well adio is sellin his 13k d4, is this mainly an sq sub or sql?

 

[squeak9798 5,000+ posts]

The K series were their budget line. Good SQ and decent output, but not really "supersub" territory.

 

[kotec123 10+ year member]

kicker cvr and type r

 

[wilzyx 5,000+ posts]

kicker cvr and type r

quiet you! those subs arent very efficient

 

[adio 5,000+ posts]

quiet you! those subs arent very efficient

from what i read, mine gets goin nicely with about 275 - 300 watts on it