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I think the serious reasons why 15s rule have been covered and now were just having fun talking about cars, PA's, 2, 3-way cabs, Frankenstein rigs and hopefully hot chicks.![]()

When you get down to the Basics, 15's RULE
1.) They push more air than smaller versions of the same model.
and
2.) They are cost effective when you consider a small up charge from a 10" or 12" driver. While it takes 2 of the smaller drivers for the same results. (2-12) is more cone space, but twice the cost
Last I checked, an Eminence Kappalite 3015LF cost a few dollars LESS than a 3012LF...just one more good reason![]()
410's move more air without being flabby but . . .
I sure do have mighty GAS for a fEARful 15/6 and the Hard Truckers HT215B.
some possible up (and down) sides for 15's:
1)They are bigger than required for many gigs, a 112 is often enough for Jazz or smaller gigs and the box does not have to be so large.
2) Dispersion in the mid frequencies is worse than a smaller driver (But would be better than multiple horizontally aligned drivers).
3) In general, they cost more than an equivalent 12 but in the UK, the 3015LF is cheaper than the 3012LF.... possibly due to rarity.
4) Larger cone area gives greater broadband efficiency (on axis). Off axis, not much in it.
5) A 15 is more likely to require a mid to sound "nice" between 2 and 5 kHz due to its size alone. Having said that, there are many with extended frequency responses but these tend to have smaller X-max.
6) If you like the look of a big stack they are great. However, you will not get people coming up to you and saying "how on earth do you get all that bass from such a small box?" so often as with a 112 or 210.
7) The cabinet is wider than for many smaller speakers taking up valuable floor space in pubs.
At the end of the day, the speaker that rules is the one which moves the most air for bass at any size. If you are prepared to use a mid and want a large driver, get an 18 to 24 incher![]()
Regarding the highlighted portion, the Eminence 3015, Faital Pro 15PR400, & Ciare 15NDH-3 (all pretty tremendous drivers) have respective Xmax numbers of 5.9, 5.75, & 6.5. How many full-range 10s/12s can match these Xmax's. I think the answer is an extremely small number.
Don't get me wrong I'd love to try one of these new cab designs with the high end speakers, but in the UK there isn't much choice...ideally I'd like to try a Baer ML112 or a TC112/115.
R Baer said:Bass Direct in the UK will have a couple ML112's in stock shortly. I would talk to Mark about it if your'e interested.
I replied "Carrots" but I LOVE my Accugroove Tri-115.
Dan K.
Dan, that is my favorite cab from Accugroove.
I'm torn between the Tri-115 and the Whappo Jr. - but you can't beat the 42 lbs my Tri-115 weighs! Maybe we should have a "slam per pound" rather than a "bang for the buck" ratio.
Dan K.
In & of themselves, 10s are no less flabby than 15s & 15s are no less tight than 10s. It all comes down to the specific speaker.
410s move more air than what? A single 15? LOL.
Even that isn't so when the 15 in question is the 3015LF. It will move more air than any commercially available 410. And in addition to air movement, you need to factor in sensitivity. The 3015LFs number is 99.8. Pretty darned good.

I would let my 35 pound 15/6 go up a weight class for that match up...![]()
But not more than a 3015LFbut thanks for the info.
EDIT: PS - I added "generally" to my post.![]()
He said this in reference to extended range speakers designed to handle the 2k-5k range without reliance on a dedicated mid driver.
Wooten and Flea are both great bassists, but neither is an acoustic engineer.
A 4x10 and a 1x15... it's a bad combination.
they're great players, and great players make anything sound good.They dont need to be acoustic engineers to know what they like - and any good acoustic engineer wroth a dang should be asking them what they like rather than the other way around.