Cabinet EQ contribution only? 1x12 2x12 4x12 .......

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blumuz123

New member
Can anyone describe in terms of EQ curve, each cabinets contribution only ?
Consider all other components/woods/dimensions equal (except for the number of speakers)

It may all be relative but just wondering if anyone has any info/experience

ex: Does a 1x12 have more midrange than say a 2x12 or 4x12?
what does more physical wood mass add?
what does more airspace add?

1x12 =?
2x12=?
4x12=?

Probably basic here but I assume everyone has experienced that closed backs add more bottom end/thump.
:)
 
The phase relationship changes as you add speakers.
The amount of wood is also effected by the type and resonance of the wood/ply. Too little it resonates too much. Too much it sounds dead.
The bigger the cab the more low end and looser lows gets.
All this is a matter of taste.
 
If you took a the measurements of a 4 X 12 cab, divided its volume by four and made 4 separate 1 X 12 enclosures and stacked 'em in a square arrangement, the sound is going to be a whole lot like the original 4 X 12. Cabinet construction would come into play a little, as a smaller cab will be more rigid and less resonant than a bigger one, assuming that they are made from the same materials.

Mainly what you get from a 4 X 12 half stack or two of 'em as a full stack is more stage dispersion, along with more low-end presence on stage (compared to a 1 X 12 for example) due to the fact you can move a lot more air molecules with all that speaker cone surface area. A mic, close mic'd in front of a single 12" cone, isn't going to know much difference, I don't think.
 
To answer a couple of your other questions:

For an individual low-mid speaker, more airspace will result in greater low-end extension at the tradeoff of losing a bit of low-mid punch. The bigger box will result in a very gradual low-end roll-off that begins higher in the frequency range, while a smaller box has a steeper low-end roll-off that begins lower in the frequency range. Hope that makes sense. Think of a big box as a 1st order high-pass filter and a small box as a higher-order filter.

Edit: the above only applies to sealed enclosures. Once you cut a hole in the back it's a different world.

More mass in the cabinet - more rigidity, actually - results in a more efficient, less colored sound from the speaker. The less the enclosure vibrates, the less sound energy is being lost from its surface and the more will be coming from the speaker itself.
 
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