3015 + 3015LF

i'd use an XO, but the cab would then be 8 ohms instead of 4.

 

The 3015 is more sensitive than the 3015lf and therefore would be louder. To even the volume out, you would have to run stereo and turn the 3015lf up about 2.5 db.

 

that would work, but i'd still use an XO since the 3015LF has some harshness to it above 900-1K.

 

AFAIK that will currently require buying an engineering sample from Eminence, built to your personal spec.

 

There's that, or you could load the drivers you have in a cab that will deliver the tone you're looking for. As for swapping out one 3015 for an LF, that will accomplish nothing. As for going to two LF, only if you're not able to get adequate low end output with what you have and you have well more than 600 watts available to drive them.

 

Are you me?

The B1500 has that sub-bass control, which I find can generate ungodly lows from 2x3015's.

If it is, in fact, a TL-606 - based cabinet, you can go for the 'step-down' tuning option by covering the middle port, which will drop your cabinet tuning frequency with a more gradual low end roll off.

 

And that's a problem why?
Those knobs are there for a reason: to get the sound you want.

 

Interesting topic. I bought a 3015 non-LF like you and put it in a fairly small cabinet and was not happy with the bright mids and highs. First thing I did was a 14 hour break-in using my signal generator and a spare bass amp head. I applied 10Hz to the cone for about 14 hours being careful not to exceed the xmax. This helped a small amount but still was too bright.

Second I bought shipping foam home from work. About 1" deep with those little triangle thingies on one side. Using contact cement I applied the foam to all sides of the cab.

Sounds great now! No brightness. Nice and dark and plenty loud. I'm back to using normal EQ curves.

 

+1

you don't have to run everything flat to get the sound you want, if you doing something far more radical with the eq then i'd start to think maybe the head wasn't the one for you!

 

Even if you have to boost the bass, you may still come out ahead of the game using the twin 3015s as long as you have adequate excursion. Let me explain:

Suppose we have two same-sized bass cabs. One cab is 95 dB efficient across the board, and the other is 98 dB efficient from 100 Hz up, but only 95 dB efficient below 100 Hz. The first cab has a nice bottom end, but the second cab needs 3 dB of bass boost to get the same tonal balance. So which will play louder, assuming amplifier power rather than voice coil excursion is the limiting factor?

The 98 dB cab will play louder even assuming 3 dB of bass boost, because the two cabs are actually the same efficiency below 100 Hz but the 98 dB cab is 3 dB more efficient (requires only half as much power to reach the same SPL) above 100 Hz.

So as long as you're not running out of excursion, I'd say stick with the 3015s and EQ the bottom end as needed.

 

But if it doesn't sound good with my amp dials all at noon why bother? ;(