Arc Flatline 12" question along with an Enclosure question

[SPLAudioHz 10+ year member]

Hey guys I am looking for some professional opinions here. Lord knows I can fab about anything but I need some feedback from those who have some knowledge with these subs. I am looking at an install ant the customer would like to get as many flatline subs in his mustang as possible. Only issue is this is a convertible and there is hardly any room for anything.

My first question is what is the maximum cu ft you guys would suggest for these subs if they were to receive their maximum rating of 1000 rms/2000 peak from.

My next question is an enclosure question. I have two different designs in mind. Both designs will require me to make a glass mold of each corner of the car (by the tails) and fab in a mounting ring. Where the ring is placed will depend on the following:

If I front fire the sub and have the back of the sub in the rear quarter using the entire cavity of the rear quarter as an enclosure.

If I rear fire the sub using the air space of the trunk as the enclosure and the rear quarter space as a secondary enclosure. I am trying to get the most bass as I can out of limited space here. Please keep in mind this is not my fist rodeo //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif I will be making those rear quarters solid with some deadening material and taking care of the little things here and there.

Thanks for any suggestions guys.

Jesse

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[audioholic 5,000+ posts]

For convertibles, I usually recommend down-firing. I say this because down-firing not only adds a loading surface in front of the sub(s), and all the advantages that go along with that, but it also helps contain the sound inside the vehicle, which is normally a real problem with vert's. By help contain the sound I mean that it helps transmit more low frequency material to the chassis (a good thing, the tactile feel of the sound improves the presence of the bass). And down-fire improves the reverberation effect of the bass that while not ideal for true SQ, again helps define the bass as inside the cabin. It also tends to increase perceived output levels because the more energy that is successfully transferred to the car's chassis, the more the vehicle's transfer function affects the sound.

My second choice would be to fire into the corners, for similar reasons.

Firing directly at the listener, with the trunk sealed would be the last choice, and would be (usually) the best choice for actual SQ, because of the lack of reverberations and minimized transfer function. Certainly other factors affect the final performance though.

 

[The_Grimy_One 10+ year member]

This^^^

Well I would deff seal them up... They only need .9 cubes, which is tiny for a 12 of this caliber! So I am sure you can fit 3, maybe... And sealed up, they should easily take 1300+ of unclipped power.