what would sound better?

[terteliu]

I'm thinking to make one of the two following :

First would be a 25 liter box for 2 sb15nrxc and a tweeter

The second would be a 12,5 liter sb15nrxc (midwoofer) and a 12,5 liter sb15nrxc and a tweeter (midwoofer satelite)


What would produce better lower frequences, 2 speakers in the same cabinet or 2 speakers in separate cabinets?

I'm asking because I'd like to be protable, it's easier to travel with two 12,5 liter satelites, than with two 25 liter cabinets. The first 12,5 with only one speaker, would stay always at home.

Here is the speaker
SB Acoustics :: 5" SB15NRXC30-8

Thanks

[PeteMcK]

no difference

[sreten]

Hi,

There will be a large difference between using one mid woofer on its own
and using two together. You could make one mid woofer a 0.5 way driver
and then use line level EQ for BSC when using the single woofer portably.

rgds, sreten.

[terteliu]

Maybe I did not express what I'd like to know.

When 2 speakers are in the same box, doing the same thing, isn't the sound composed from both of them? And going further, is the air moved with more force because is the power of both of them?

Or the sound is the same if I put them in separate cabinets, of course there will be the same crossover splited.

I'd like to make the this SB Acoustics :: Elok
but splited in two separate cabinets, to be portable. The sound of one tweeter and a SB Acoustics :: 5" SB15NRXC30-8 it's more than decent for any party in a hotel room, even though many may not know this speaker, but it produces enough bass response to vibrate the hole furniture in a 20 sqare meters room, and it's a warm one.
When I come back home, where I want deeper sound, I'll conect the second mid woofer. The sound should be the same as the Elok?
So it's better to keep both of the mid bass speakres in one cabinet, or it's the same if I make separate cabinets, the crossover being the same.

Thanks.

[mdocod]

Well... A "single speaker" would not produce a stereo pair. Why would you leave half a stereo pair at home?

I would suggest building 2 separate boxes, but making sure they stay together as a stereo pair at all times. Spread them apart some while in use to broaden the "stage."

[terteliu]

Yes it will be stereo, 2 cabinets with a mid woofer and a tweeter, and 2 cabinets with only the mid woofer, conected at home, but separate on short trips, when the space for bagages is verry limited.

[Jay]

How about the crossover? Will you stick it with the portable MT? And how about the port (if used), will it be with the MT?

A perfect MTM crossover will not work perfect with an MT (Crossover for MTM should be different with crossover for MT).

It is a small speaker (box). Remember that there is a volume behind the tweeter too. I know it is difficult, but for portability I prefer a new design with small MT and another M in bigger enclosure handling different frequency.

But the point of double woofer is to lower the distortion.

Yes, you can make the woofers in separate boxes, same sizes. Make it a little bigger and make it sealed (no port). But the crossover for the MT part is difficult. May be a full-range M with a single cap on the tweeter, when the MT part is used separately (on trips). Remember that a full-range, with its added distortion, will give better sonic, so it may still be quite listenable.

[sreten]

Hi,

The c/o values for the MTM will be wrong for the MT. The low pass 4 ohm MTM
values will change frequency and Q with the single 8 ohm driver. The tweeter
level will be 6dB too bright in the MT.

However if you replicate 8 ohm versions of the low pass in both cabinets, and
fit a switch to the high pass to change tweeter levels by 6dB, it will work.

Though at home the bass will go no deeper, only 6dB louder, unless you make
the MT cabinet small and sealed, and the M cabinet twice the size vented.

rgds, sreten.

[terteliu]

Thanks a lot, I have an idee of what to do.