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Re: 12" driverHelge,Due to the pressure pot gain in the cabin of the car, I'd suggest a sealed box as the best fit, as the increase of the car's pressure pot gain is a good match for the 2nd order roll off of a sealed cabinet. Also, with no high pass filter available, any ported box you build is going to run into this same excursion restriction issue, it is only a question of what frequency is it going to happen at, as all ported boxes catastrophically unload drivers below the tuning frequency.Personally I would buy this fifteen inch driver, wire the voice coils in series, and possibly use Parts Express' 90L knockdown enclosure for it. $200USD for the driver, a sealed box, and you're done.Cheers,
Re: 12" driver
Helge,
Due to the pressure pot gain in the cabin of the car, I'd suggest a sealed box as the best fit, as the increase of the car's pressure pot gain is a good match for the 2nd order roll off of a sealed cabinet. Also, with no high pass filter available, any ported box you build is going to run into this same excursion restriction issue, it is only a question of what frequency is it going to happen at, as all ported boxes catastrophically unload drivers below the tuning frequency.
Personally I would buy this fifteen inch driver, wire the voice coils in series, and possibly use Parts Express' 90L knockdown enclosure for it. $200USD for the driver, a sealed box, and you're done.
Cheers,
