1 s12l7

[Bosaliniee 10+ year member]

ok i have a dodge stratus rt and i have a kicker kx1200.1 and i was going to get a s12l7 dual 2 ohm wondering what size box i should make and if it should be ported or sealed, i want it to be clear but loud, more on the clear side. also with the box i make does it matter in the trunk which way i point the sub for sound quality. my trunk isnt that big and i want to have some room to put things in it.

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[thai_creeper 10+ year member]

big ported box(for loud) and tuned low(for quality)

 

[Bosaliniee 10+ year member]

how do you tune low? ive never built a box before

 

[thugpassion 10+ year member]

wouldnt the daul 4ohm wired to 2ohm be a better choice since at 1ohm that amp puts out 1250-1500w. at 2ohm you'll get closer to the rated power for that sub 750rms. i give mine 620w sealed right now, in a week or so it'll have 800+w!

 

[Bosaliniee 10+ year member]

its 750 rms for the sub, so my amp at 2 ohms is rated at 600rms, the guys at the shop i go to which has a good car audio section and deals in kicker, eclipse, kenwood and some other pretty good brands, said its better to give that sub more than the rms than less. they said with less, there is distortion which humans cannot hear but will damage the equipment, and i have heard this from some other shops also. of course im not going to have the gain all the way up anyway

 

[thai_creeper 10+ year member]

go to the box/enclosure section and look theres a sticky of lots of plans, choose one with a big size and low tuning(around 30)

 

[VereChronicus 10+ year member]

You definitely won't hurt the sub with lower power and your amplifier will push closer to 800-850wrms @ 2ohms. It is not one that doubles in power from 2 to 1ohms despite the ratings. The ratings are for USACi style competitions where they go by the manufacturers 4ohm output rating. That amp will put out about 425ish into 4ohms. There are tons of myths floating around out there about low power killing subwoofers as well as 50k other myths on different subjects. It's common, but it's not true. With the same alternator, and the same amplifier, at lower impedances there is MORE distortion, so going UP in impedance from 1 to 2ohms, you will basically cut the distortion by 1/3rd in this instance. For extra information, to give you "ammunition" or knowledge for future dealings with local shops and the many myths and possible sales traps...... The gain is not a volume knob, it is only there to match the input signal strength to the amplifier input section. The amplifier has a given exponential value in amplification...like 20:1. Feed it 1 and it'll give you 20....if the gain is set correctly. If the gain is set too high, you can clip a 1ohm stable amp at 4ohms and burn a 1200wrms subwoofer to death with what you thought was 300wrms coming out of the amp.

Just some extra info for future use.

 

[Polecat 5,000+ posts]

3.0 cu ft

50 sq inches of port

18” deep

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[thugpassion 10+ year member]

You definitely won't hurt the sub with lower power and your amplifier will push closer to 800-850wrms @ 2ohms.
Just some extra info for future use.

that was my point, he stated he has a dvc2ohm model so its either 1 or 4ohms, either underpower or overkill. i guess it'll be ok just be careful with the gain!

 

[Bosaliniee 10+ year member]

i do want to stick with 1 l7 but since its going to be over kill for the 12, should i go with a 15? also is this the box plan i should use for the 12. http://img23.imageshack.us/my.php?image=3cubes30hz465sqin6xu.png and if i should get a 15 should i make a bigger box?

 

[Polecat 5,000+ posts]

in that box, 12"...10" may even be better with 2.15 cu ft

 

[Bosaliniee 10+ year member]

it says 3 @ 30, so doesnt that mean its a 3 cubic foot box at 30 Hz, or does the main chamber where that one says 2.15cubic foot need to be 3

 

[vetkilr 10+ year member]

Its 2.15 and then you add the air next to it at 1.02 thats 3.17cuft..........then if you delete what alot of 12s cuft are (.17) your now at the 3.0 cuft you need for a 12.

 

[Bosaliniee 10+ year member]

so which box on there should i use in the box plans for a 15 L7