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Old 08-26-2007, 04:21 PM   #31
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that is a good setup, as for the wire kit is should do fine, i would go with something i little nicer. for a box you can just make your own with some mdf just like triple88a did.

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Old 08-26-2007, 04:53 PM   #32
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Quote:
Originally Posted by Teal J View Post
Ok now this sub is dual voice coil..

Alpine SWR-1222D
Type-R 12" subwoofer with dual 2-ohm voice coils

If you want it to end up with 2 ohms you will either have to buy a 1ohm dual voice coil or a 4 ohm dual voice coil.

here is a 4 ohm dual voice coil speaker..

http://www.crutchfield.com/S-BETVk0W...rch=Alpine+SWR

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Old 08-26-2007, 06:39 PM   #33
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that dual 2 ohm sub wont go well with that RMS 500w @ 2ohm amp?

Or could I go with a more powerful sub, or less powerful amp?
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Old 08-26-2007, 06:41 PM   #34
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oh, and any suggestions about a better wiring kit?
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Old 08-26-2007, 09:01 PM   #35
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I dono the wiring kit seems fine to me..

As the sub goes.. I like to treat every coil as its own speaker since its easier to understand. Hope my diagram helps. With multiple coils you can wire them in different ways to get a different ohm rating .. As you can see on the image the ohms by the speaker pictures are the ohms of each coil and then the ohm by the amplifier is them combined.

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Old 08-26-2007, 09:15 PM   #36
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here is the wiring kit i bought and i liked it.. http://cgi.ebay.com/ws/eBayISAPI.dll...m=130126821089

This one seems similar to it..
http://cgi.ebay.com/4-GAUGE-POWER-WI...QQcmdZViewItem
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Old 08-26-2007, 09:29 PM   #37
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BTW since i didnt want to run the power wires all the way to the other side of the engine compartment i just drilled a hole and ran the wire through there. Here is where i drilled it.

Passenger side foot compartment.




Thats on the other end of the firewall right behind the passenger tire looking up.




And how its wired to my "red top"

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Old 08-27-2007, 10:02 AM   #38
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if you are set on that kenwood amp, i would get this sub:

http://www.crutchfield.com/S-oIs4Gyx...0&I=500SWR1042

i would buy a downfiring enclosure from this guy:

http://www.just4effect.com/10SUBBOX.htm

and you can buy a 4gauge Scoshe wiring kit from walmart for $20.



i wouldn't recommend running your power wire like Triple did. at very least you need to use a grommet. you should never send a power wire through bare metal. additionally, it is very low, so if you happen to wheel and get water in your tub, it will certainly be under water. the best place to run the wire is under the door ledge. it is hidden and protected.
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Old 08-27-2007, 11:36 AM   #39
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i would suggest to keep the 2-ohm dual voice coil. with the right amp he can have a nice setup. the lower the ohms the better.
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Old 08-27-2007, 11:55 AM   #40
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i think you are looking at it backwards.....the ohm rating at the speaker is not what you are concerned with. it's at the amp that you would want the 2ohm. a DVC 2ohm sub is going to show 4 ohms at the amp. you need a DVC 4ohm to show 2 ohms at the amp....which is what he would want.
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Old 08-27-2007, 04:24 PM   #41
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I couldnt learn the ohm info by myself, so I went to cartoys and they knew even less.
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Old 08-27-2007, 05:37 PM   #42
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Quote:
Originally Posted by Triple88a View Post
Do you understand the diagram?

Each speaker being "a coil" in a dual voice coil sub. You can wire them differently to get different settings.

That down firing sub box seems good to me too. As making a hole through the firewall and using a grommet. I gotta get some big drills for that liquid electric tape is good enough for now though. Not shown in pic..
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Old 08-27-2007, 07:55 PM   #43
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learning Ohm's Law is a lesson in itself. to save yourself some time and brain growth, this listing from Crutchfield is the best i've found to help when picking out speakers and helping you figure out how to wire everything.


http://www.crutchfield.com/learningc...rs_wiring.html


edit: and cartoys is one of the worst places to go for information or installations. they do have decent sales sometimes, but i wouldn't bother with them otherwise.
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Old 08-27-2007, 09:21 PM   #44
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thank you, to everyone... this was the final order.

Amp: http://www.crutchfield.com/S-Wt7nyam...0&I=500MRPM650

Sub: http://www.crutchfield.com/S-Wt7nyam...0&I=500SWR1042

Wiring Kit: http://cgi.ebay.com/4-GAUGE-POWER-WI...QQcmdZViewItem

Box: I'll try to get a ported box made by the time this stuff arrives. Any suggestions?



hows all this look? Its on the way.
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Old 08-28-2007, 10:30 AM   #45
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the amp will overpower the sub a decent amount, but you shouldn't have any problems. overall though....that thing is going to friggin slam. you will be blown away.

couple things though....you really should've gotten a 4 gauge wiring kit. the 8 will work, but you could see some power supply issues.
also, do yourself a favor and either build or buy a quality enclosure. with the depth of that sub, it will have to be downfiring which is best for a wrangler anyway. i have always built my own enclosures, but those linked above from just4effect.com are TOP notch. a sealed enclosure with that sub will pound. too many people make ported boxes incorrectly, so i would stay away from that design.
for $140 from just4effect, you get an enclosure that is fully designed around the backend of the TJ tub. the design has already been perfected considering the notches for the tailgate and latch, and for the seat latch if needed. comes covered in your choice of material, etc. for the price, you probably couldn't have one made locally that nice or for the price, and it wouldn't be worth your efforts to design it yourself...there are many complex cuts involved. it leaves space for supplies or a perfect place to mount, protect, and hide the amp.
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Old 08-28-2007, 05:30 PM   #46
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i went ahead and got a good amp so if i wanted to upgrade to the alpine type x, i could. An amp that overpowers a sub will still get the full effect from the sub will not heating up the amp too much, right? I did buy a 4 guage wiring kit.
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Old 08-29-2007, 10:02 AM   #47
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you did pick a nice amp. alpine makes generally good stuff so you should not be worried.
speakers have RMS ratings because that is what they are designed to handle continuously. it is not intended for them to run more power than their RMS rating; however, i say that as mostly a disclaimer. most quality speakers can and will handle more power as long as the amp is tuned properly.
as long as your amp puts out every bit of its RMS rating as it says it does (not all actually do), and it is matched with a sub with equal power handling, you will get the full effect from the sub. the only reason you would need to run a higher power rated amp to a sub is if the amp is of lower quality and does not actually put out as much power as it says it does. and if that is the case, it probably creates way more distortion than you would want anyway.

on a side note, while that amp is powerful, it will severly underpower a Type X sub if you ever wanted to upgrade. that amp will power a 600watt sub flawlessly, but you will be starving the daylights out of a Type X 1000watt sub to the point where it will not be worth your time and efforts. the Type X is a power hungry sub. 600 watts is not going to cut it.

on the wiring kit....i'm not sure what i was looking at . good call on the 4 gauge.
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Old 08-29-2007, 09:00 PM   #48
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Good setup.. i dont think it will overpower the sub since the amp is 600rms and the sub is 500rms but 1500wats max power so... I think it will be enough though. i with my 450rms kicker cant breathe since my nose physically closes each time the bass hits (hard top)
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Old 08-30-2007, 08:37 AM   #49
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Quote:
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Good setup.. i dont think it will overpower the sub since the amp is 600rms and the sub is 500rms but 1500wats max power so...
600 - 500 = 100 = 100 watts more = overpowered. it probably won't hurt the sub if the amp is tuned properly, but it very well can. the point is, technically the amp does overpower the sub, and technically any certified audio dealer cannot recommend that setup because of that. now on another note, i would personally run this setup. i just wanted to make the point that to setup a system properly, you should be matching the RMS ratings on speaker and amp. a lot of people ignore that and wonder why they damage their equipment.
"max power" doesn't mean squat. it would do a lot of people a lot of good if "max power" was removed from product discription.
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Old 08-31-2007, 12:36 PM   #50
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It's probably better to have an amp with a bit too much power rather than too little. If you don't have enough power, the amp clips, which is really bad for a speaker. The gain has to be set properly...it's not a volume control like some people think.

tm
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Old 08-31-2007, 01:11 PM   #51
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^^ that is definitely the case with lower quality amps, which the alpine he got is not.
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Old 08-31-2007, 04:47 PM   #52
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Quote:
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It's probably better to have an amp with a bit too much power rather than too little. If you don't have enough power, the amp clips, which is really bad for a speaker. The gain has to be set properly...it's not a volume control like some people think.

tm
2x... the gain isnt really hard to set up but no it isnt a volume control.. the volume control would be on your head unit.. "subwoofer +-blah" or the bass knob on the amp...

If your gain isnt set properly then 2 things would happen.

let say your head unit will be really low volume.. 1 out of 10 You will hear the bass loud and as you turn it up to let say 8-9 out of 10 the bass wont increase much so there wont be enough bass when you turn it up.

The other thing that can happen is just the opposite. bass is low when the head unit is 1 out of 10 but just way way too loud as you increase the volume of the head unit.

You are probably thinking loud is good.. but i my self like to still hear the voice and the treble even when the bass is loud.

A perfect gain setting would be even gain as the music gain increases.

If you still need extra bass use your bass boost settings but not the gain.
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Old 09-02-2007, 04:01 PM   #53
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600 watts really shouldnt harm it much. if your worried just wire it in series. and dont get a type x its the same thing as the r except sounds better. they both put out the same spl. imo i dont think its worth it.

if you want something better down the road look into a sound splinter rl-p, diamond audio d6, or something from digital designs.

and 8 guage will work fine. any more than 600 watts though and txst is right and you should upgrade.

if ya wanna learn up check out bcae1.com itll help ya out on building the box too if you dont know the formulas.
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Old 09-02-2007, 04:08 PM   #54
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Quote:
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and dont get a type x its the same thing as the r except sounds better. they both put out the same spl. imo i dont think its worth it.
...sounds better.... isnt that the point?
Quality is one of the major deciding factors. I'd choose quality over spl even in my sleep. I'm pretty sure not many do sound competitions in their wranglers so...
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Old 09-02-2007, 04:42 PM   #55
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yes but for the money you can get a much better sql sub than a type x
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Old 09-04-2007, 08:58 AM   #56
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alpine makes a 10" type R sub in a ported box that sound great. If you can find one they run around $250. And the speaker is enclosed so nothing will happen to it..

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