Ok, so this a car audio kinda question, but I have a problem and I desperately need help. I am redoing the stereo in my boat and I want it done right. I am planning to add 2 subs located in the gunwales right next to each front seat. I have done a lot of homework and I think this is the best place to put them. They will go in a wedge shaped box very similar to the one I used in my old truck with great success.
Hence the problem, I am planning on using 2 Alpine SWR 1243d (dual 4 ohm) subs with an MTX Thunder 801D amp (400 watts RMS at 2 ohms at 12v) going to each one. I have gone through several box designs and keep going back to sealed because of the marine environment. I am going to coat the boxes in spray on bed liner to seal the MDF from the moisture associated with the marine environment.
According to the T/S parameters of the subs, they should be ideal in a sealed box application.
http://support.alpine-usa.com/products/documents/OM_SWR-10+12_23D_43D.pdf
The Qts of 0.53 indicates it would work well in a sealed enclosure.
The EBP, or Efficiency Bandwidth Product = Fs/ Qes of 31hz/0.57= 54.386 indicates that it should work fairly well in a sealed box.
And, Alpine states that it will work well in a sealed box of optimum size .90 ft^3 gross internal volume and a net internal volume of .75 ft^3
But, every one of the car audio GOOFS that I have spoken to about getting my boxes built, and nearly everything I have read online says that the Alpine Type R's do not work well in a sealed box, unless it is considerably bigger than Alpine's specs, and you almost have to go ported.
WTF gives??? Soundhound, Flint, DIY'ER, SMGreen (my car audio freaky brother), I need help. I joined caraudioforum.com like 3 weeks agao and still can't post or start threads.
Hence the problem, I am planning on using 2 Alpine SWR 1243d (dual 4 ohm) subs with an MTX Thunder 801D amp (400 watts RMS at 2 ohms at 12v) going to each one. I have gone through several box designs and keep going back to sealed because of the marine environment. I am going to coat the boxes in spray on bed liner to seal the MDF from the moisture associated with the marine environment.
According to the T/S parameters of the subs, they should be ideal in a sealed box application.
http://support.alpine-usa.com/products/documents/OM_SWR-10+12_23D_43D.pdf
The Qts of 0.53 indicates it would work well in a sealed enclosure.
The EBP, or Efficiency Bandwidth Product = Fs/ Qes of 31hz/0.57= 54.386 indicates that it should work fairly well in a sealed box.
And, Alpine states that it will work well in a sealed box of optimum size .90 ft^3 gross internal volume and a net internal volume of .75 ft^3
But, every one of the car audio GOOFS that I have spoken to about getting my boxes built, and nearly everything I have read online says that the Alpine Type R's do not work well in a sealed box, unless it is considerably bigger than Alpine's specs, and you almost have to go ported.
WTF gives??? Soundhound, Flint, DIY'ER, SMGreen (my car audio freaky brother), I need help. I joined caraudioforum.com like 3 weeks agao and still can't post or start threads.