Cab/Speaker Help

[kalvik]

Hey all!
So I'm planning out a cab right now and need some suggestions. The thought is for two 8" speakers and a 12". Maybe it's not the best setup but I want something a bit different because I can. Anyhow, the two 8" would series and then parralel with the 12". If I want to make full use of my LMT800 at 4 ohms, am I correct that the 8" need to be 4 ohm and the 12" needs to be 8 ohms? Also I'm looking for something closer to an 800w RMS.
If that premise is correct, any recommendations for speakers? Finding 4 ohm 8" is less than fun.
I've found one here:
http://www.usspeaker.com/faital pro 8fe200-1.htm
It's not Eminence but any feedback or recommendations would help since I've had no experience with that brand.
Finally, I'm looking for a 12" that's about 400w or so?

Thanks guys! I'll be back here if I posted something stupid

 

[Jim Carr]

Why not two 12's?

 

[kalvik]

Mainly to be different. And the smaller cones should react faster than two larger cones. It should also make the overall size of the cab smaller.

 

[swamp_bass]

Regarding the question you're asking: If you design the crossover to eliminate overlap, then you would arrange 4 ohms for the 12" and 4 ohms for the two 8's.

With your arrangement, that crossover point could be quite low with the 12 taking all the sub - 100Hz content.

 

[kalvik]

I hadn't even thought of doing a crossover. The list expands! So really the 8s don't have to cover as much low end and the 12 can be, more or less, the bass cannon.

 

[swamp_bass]

If you don't use a crossover, the overlap between an 8" speaker and a 12" speaker is likely to be large. The strength of multi-sized drivers is to divide the work into the speakers best cut out for it.

For a no crossover design, you're best sticking with all the same drivers.

 

[Bass_Pounder]

Mainly to be different. And the smaller cones should react faster than two larger cones. It should also make the overall size of the cab smaller.

Not true....................


And, in addition to a crossover, you need to build a separate chamber to house the 8's (and you should also consider using only one 8").

 

[Foz]

maybe one 6.5 or even smaller!

Spend a bit of time looking over these free to build designs... you might save yourself a lot of time / money / frustration latching onto a known good set of plans... or at least get some ideas for your own design that are more rational and practical than what you have mentioned so far.

[Invalid or Expired Link Removed]

[Invalid or Expired Link Removed]

 

[fdeck]

"Smaller cones are faster" is a misconception about how speakers work.

The problem is that modern speakers are pretty well optimized, which means that doing something "just to be different" means doing it "just to be inefficient."

 

[dukeorock]

"Smaller cones are faster" is a misconception about how speakers work.

The problem is that modern speakers are pretty well optimized, which means that doing something "just to be different" means doing it "just to be inefficient."

+1

 

[Jim Carr]

There are some amazing 8s and 88s out there. Look here: Link Removed

 

[fdeck]

Yup. I've got an 8"er made from that FaitalPro driver, and it's my favorite cab, but I play mostly jazz and just don't need to be very loud.