2 Sony XPLOD 12's VS. 1 Diamond Audio 15"

[CodyYork]

Ok, so I stand at a crossroad here. I currently have 2 sony xplod 12's in the trunk of my 2005 hyundai tiburon (center ported box). To my surprise, and everyone else's, they actually sound pretty good. Whoever did the box on the,m did a great job.

I also have a diamond audio 15 inch sub I got for free from my buddy a few years ago. Its in a POS sealed box that sounds like crap. At one point i had it in my trunk and it hit so low, I loved how much power it had behind the low notes, but I missed having quality, throaty high bass notes as well. The 12's in the existing enclosure had more range quality than the 15, so they went back in.

I'm looking for the best sounding setup right now, and I know the diamond is a better quality sub, but I'm not sure if it will be able to hit the highs like I want to, depending on the enclosure I build. Can anyone offer any help or advice as to what direction I should go? Money is tight (when isn't it?) but I'm willing to listen to some experienced audio "experts" on what route to take. Thanks for any help!

Vehicle :Hyundai Tiburon 2005

Location in the vehicle: Trunk

Space available (Length x Width x Height): Roughly 35"X30"X16"

Subwoofer make and model: Diamond Audio CM315D2

Subwoofer Size: 15"

Number of Subwoofers: 1

Type of Port (Kerfed, Slot, Aero, etc.): ?

What type of music do you like?: Hip Hop

Is your goal SPL or Everyday Music?: Quality Range for everyday music

Tuning Freq (Hz): ?

Volume : ?

Subwoofer make and model: Sony XPLOD XS GTX120LW

Subwoofer Size: 12"

Number of Subwoofers: 2

Type of Port (Kerfed, Slot, Aero, etc.): Center Port (Slot?)

Tuning Freq (Hz): ?

Volume : ?

EDIT

Also running 2 amps. One is powering my 6X9s and Door speakers, the other is strictly for my subs. The Sub amp is an MB Quart ONYX 1500 monoblock. Just checked after I got out of class

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[adulbrich 5,000+ posts]

Sony's will have more cone area. I don't know which would have more motor force. Definitely go ported with either though

 

[Jeffdachef 5,000+ posts]

stick with the two 12s in a ported box. If a sub cant hit the highs in a sealed box, its not gonna hit the highs in a normal tuned ported, you'll have to tune 40hz and up and that generally does not sound great. More power will help with the loudness, get a 1000-1200 rms amp.

IF you really wanna try the 15 in a ported box, take your pick

http://www.srtforums.com/forums/f40/official-free-ported-box-plans-56k-no-435910/

 

[CodyYork]

Just checked and turns out I have an MB Quart ONYX 1.1500D. So power is plentiful for either setup.

The thing is with the 15", the box is absolute dog sh*t. It was built in a "show car" (Some POS 96 civic with neons and autozone vents) He had the sub built into his spare tire well, so the box is almost the same size as the sub. That's what is giving me second thoughts to bring the Diamond Sub back, in a nicer setup. It's definitely a higher quality sub.