The Axis is going to outperfom the 12w7. It's also cheaper with the sale price. As for the Mal-X; that's an 18" driver, it makes no sense to compare/suggest an 18" over a 12", as people are looking for specific size drivers usually. The AXIS is a superior driver though if you keep in mind it's diameter limitations. The Axis will work superbly well in sealed or ported applications. Sealed required EQ compensation of course - but this(EQ) is a standard requirement for a high quality sealed systems.
-Chris
I've modeled several 12" drivers and the JL audio 12w7 vs the Axis 12" is a very interesting comparison. My concern with the 12" is it's tendancy to peak very badly around the tuning frequency when tuned low. However I've modeled a bit more and find the 12" axis to equal the JL audio completly in response in a box half the size. I must say that's very impressive considering it's cheaper as you've said. In a 5 cu ft the JL Audio gets 118db but the Axis gets that in 2.5 cu ft box.
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That's tremendous.
My only concern would be getting the rear port air velocity down in the 2.5 cuft box. Even a well designed slot port would have a hard time reaching the length required to use the Axis at full power.
I apologize if I misled anyone. I know many folks are like me. Some will buy the driver then design the box. This is where I based the maelstrom suggestion on. In a small sealed this thing gets 104 db at 20 hz. Which is higher than most would need in a small build for an apartment.