ported question.

They can be in the same box.

They can be in the same box.

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You can do a common chamber as long as you do much internal bracing. I suggest "ALL THREAD" to help minimize flex. I always try to keep subs in seperate chambers for a few reasons

1. If a sub blows out or quits working, it wont affect the second driver.

2. Common chamber enclosures are not as rigid as chambered (or seperate) enclosures without much bracing and extra work.

3. If using 1 amplifier per sub, they MUST be perfectly matched if using a common chamber enclosure, otherwise you'll damage your subs and/ or get crappy sound.

4. If using a single 2 channel amplifier (wired in stereo), the drivers are recieving different signals at different times, thus causing some cancellation of one another. (left channel usually drives more bass than the right channel). This is where a "MIXED MONO" comes in handy.