I have a 2013 Ram Quad Cab, nothing special, is just a budget setup. I had the Alpine system from factory and 8.4 inch radio. I replaced all speakers with 2ohm(actually are 2.4 ohm) interior speakers with jbls except headliner running off the OEM amp. Sound deadened and closed cell foam on all door panels. I have a 1100 watts rms mono Amp stable to 2ohm. I'm running a Amp pro ch41 to the amp for subwoofer signal. Under rear seat I have a custom homemade fiberglass dual 12 box with total airspace undivided of 1.7cf. Is pretty tall so seats are lifted as high as possible with headrest. I had 2 subs in there and due to basket shape it hit side of lower box, so for quick bass I just put in some $40 400 watts rms pioneer champions to get me by until I can decide on what I need and they actually sound good, but really low bass is not perfect, but does hit hard and sounds good for what it is. So my question: I was thinking of 2 Alpine Type S 12s in box, would fit with a lot of room to spare. Not sure if that's best option and if I do the alpine, should I fill in center of box to have 2 sealed areas that would be a little over. 80cf space for each sub. I know the Aplines are not the most efficient, so is what's keeping me wondering. The pioneers are 95db efficient. Or should I go with 1 1,000 watt rms 12 and use entire 1.7cf.Trying to stay around $250 for 2 or 1 sub. Advice appreciated. I don't know exact cf of box, but comparing to other fiberglass enclosures for same vehicle, it can be anywhere from 1.7-1.9cf. Box is super strong, could handle most subs without issue, depth is around 9 inched but basket size and magnet size may interfere, so some won't work.
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