[mrclean]

I want to redo my box because the idiot before me made it out of plywood, and im pretty sure its not built to spec. in looking at the specs from JL's web site, i just wanted to make sure that i was reading this right. I have the 12w6, so is it saying i need two ports? Link is below. Also, when you make a port, or heck even a box, I know that you want to make it to a certian frequency. I guess im not sure what frequency to build it to, if i should just build the box that jl suggests, or what.


http://mobile.jlaudi.../8-12W6_BDS.pdf



also, this is a DVC sub, and im kinda stumped on how to wire it to the amp. the amp is a 4 channel, 1000 watt. i think i know how, but i dont wanna mess something up, or not get the full potential. The amp is bridgable, and its obvesouly channel 1 and 2, and then 3 and 4.

heres a pic, maybe some on can finish drawing it up.

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This post has been edited by mrclean: 23 February 2010 - 10:17 AM

[Nick07]

Not too sure about the box part cuz I just buy boxes since I haven't had the ambition to go custom yet. As far as wiring the sub goes, the best way to wire it is to match the ohms. If you sub is 4 ohms and your amp is 2 ohms, then it needs to be wired a certain way to make the sub function at a 2 ohm level. The lower the ohms the better, check and see what the ohms are on your amp and sub then I could give you a straight answer on how to wire it or you could easily find that on the net

[Dbl_D718]

If you build the box to JL's specs, it'll be tuned to whatever frequency they recomend. I didn't see it given on that link anywhere, but you could find a calculator online pretty easily I think and plug the dimensions in and it'll give you a tuning frequency. Generally you want it as low as possible, to around 28-34 Hz. I'm not sure what JL recomends though. As for two ports, you can do it that way, or make one port that has double the volume. That should give you the same result. Building your own box, you might find it easier to build a slot ported box instead of tube ports, in which case you'd just want to make the slot port the same volume as the two tubes added together.

For wiring, you should post your amp's specs. JL is wierd in terms of doing 6 ohm voice coils, and chances are you have a 2 ohm amp that can do 4 ohms bridged. You can't do either of those with a 6 ohm DVC sub lol. If it was me, I'd wire the coils in parallel giving you a 3 ohm load, and bridge the amp. That puts you under the approved load for bridging probably, but it might be ok depending on what amp you have.

[jaybaum96]

keep in mind i have 2 12's with no ports in a smaller box. But again mine are about half the power of your one. Haha.

[mrclean]

hey guys, finally got around to posting my amps specs, heres the link http://www.pyleaudio...p?model=PLA4180


so after looking at that, who can help me out haha

[Dbl_D718]

Did you already buy that amp? I hope not, it's junk. It doesn't do anywhere near 1000 watts, those are all max ratings. I searched for it's real output and found 35 x 4 at 4 ohms and 50 x 4 at 2 ohms. That means 100 x 2 at 4 ohms bridged. Here's the link to that info. Not to mention this amp is a horrible choice for a single DVC sub since it's a 4 channel. If you bought that, try to return it.

You can't wire this in any good way really. You don't wanna bridge the amp and wire the two channels to each voice coil because you'd have to set the gains 100% perfect to avoid destroying the sub. Each voice coil needs EXACTLY the same signal, so you always wire them to the same channel. Thus, your best bet is wiring the voice coils in series (giving you 6 ohms) and wiring them to one bridged channel on the amp. This gets you less than 100 watts for your 300 watt sub.

Cliffs: buy a different amp.

[bumpin96monte]

Pyle of crap? lol

Definitely ditch the amp- for any sub.

You always need to make sure you match your equipment when buying it.

[mrclean]

I bought them used from my friend for $90 so i wasn't the one who bought it hahaha

so can someone help me pick an amp then? What would be good on say best buys web site? I believe the spec sheet or the sub is in the first post.

Thanks again guys!

This post has been edited by mrclean: 10 March 2010 - 03:48 PM

[Dbl_D718]

Since you need to make power at 3 or 6 ohms, I'd say look for a mono amp that does around 500 watts RMS at 2 ohms and wire the coils in parallel. That'll give you 3 ohms, so you wont actually get 500 watts but you'll still have over the 300 your sub can take. Set the gain right and you'll be golden.

You could also look for a bridgeable two channel that does around 500 RMS at 4 ohms bridged and wire the coils in series to give 6 ohms.

This is the only amp I noticed at Best Buy has that fits your needs that's worth buying:
http://www.bestbuy.c...4&skuId=8699358

Other options:
http://www.powermaxe...5&idcategory=10
http://www.powermaxe...8&idcategory=10
http://www.powermaxe...9&idcategory=10
http://www.powermaxe...8&idcategory=10

[mrclean]

hmm ill probably get that one from best buy. thanks for your help.

now you said itll be making more than the 300 my sub can take so i gotta set the gain right, how do i go about doing that so ik that its not gonna get damaged?

This post has been edited by mrclean: 11 March 2010 - 09:52 AM

[Fatboy501]

Check out caraudioclassifiedsonline.org... great resource. In the tips and tutorials section, there's a write-up on how to set your gains using a digital multi-meter. As far as a good amp... If you're building a ported box tuned to a specific frequency, it would be a very wise idea to acquire an amplifier with a sub-sonic filter. Set the filter to the port tuning frequency that you have chosen.... all depends on how low you want to go. The sub-sonic filter stops sounds under the set frequency from being transmitted, as you may know from the name. The reason for this is that when a box is tuned for a certain frequency, the box keeps enough pressure inside at and above that frequency to keep your sub in one piece. When you play frequencies lower than PTF, the stability is lost and your sub can unload itsself, free to bottom out. Basically, frequencies lower than PTF are NOT GOOD. Also, when building your box, be sure to account for internal airspace after the displacement of your sub, which you may have already done. If you get the Thiele/Small parameters for your sub, numerous members of CACO (the site above) can shoot you a good design. I hope this was of some help...