1. ## Sealed Vs. Isobaric Volume

If you have a single sealed box at the recommended volume for a specific subwoofer, can you just install another sub on top of it and wire it backwards, or should you increase the box volume?

2. ## Re: Sealed Vs. Isobaric Volume

you have to half the volume for isobaric.

3. ## Re: Sealed Vs. Isobaric Volume

So... a sub with a recommended box volume of 0.5 ft^3 would only need 0.25 ft^3? That doesn't make sense to me... someone please explain.

4. ## Re: Sealed Vs. Isobaric Volume

So, if I'm not mistaken, with a sealed enclosure the recommended size for one sub you could use four subs like this?

5. ## Re: Sealed Vs. Isobaric Volume

TTT before I go to bed...

6. ## Re: Sealed Vs. Isobaric Volume

Originally Posted by Jonahdude
So, if I'm not mistaken, with a sealed enclosure the recommended size for one sub you could use four subs like this?
You are not mistaken

7. ## Re: Sealed Vs. Isobaric Volume

Also, if I'm not mistaken, giving them each the same power you gave that one sub would result in the same output as 2 subs in a box four times as big?

8. ## Re: Sealed Vs. Isobaric Volume

Four subs in two iso-pairs in a box the size required for one of the subs getting four times the power of one would provide the same output as a pair of subs in a box twice as big. Iso loading a pair of subs doubles the Mms and halves the Vas. The doubling of the moving mass halves the efficiency. Treat each pair as a single sub with half the Vas and twice the Mms and twice the thermal power handling.

9. ## Re: Sealed Vs. Isobaric Volume

Originally Posted by helotaxi
Four subs in two iso-pairs in a box the size required for one of the subs getting four times the power of one would provide the same output as a pair of subs in a box twice as big. Iso loading a pair of subs doubles the Mms and halves the Vas. The doubling of the moving mass halves the efficiency. Treat each pair as a single sub with half the Vas and twice the Mms and twice the thermal power handling.

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