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The polarity is definitely correct no doubt about it. I also dont know what you mean jyeager about mismatching ohms because the ohm loads of each speakers are going to be the same. I already have JBL GX602s in the rear and I'm planning on putting in the matching components (JBL GX600C) in the front which are also 2 ohms. I don't want to have to go through all the trouble of installing an amp and having to run speaker wires to all the speakers. Also Kingman, why wouldn't an aftermarket deck like lets say the Kenwood DPX501BT work for 2 ohm speakers? I know the power output will be perfect for 2-70 RMS power speakers.

What's the name of the thread, I cant find it.

Ok thanks for everyones help. I've decided to install 2 ohm components in the front to match the rear speakers and to replace the factory amps in the front with the supplied crossovers. Ill also replace the HU and bypass the cargo amp powering the rear speakers so everything will be coming straight from the HU. I believe ill be happy with that and ill be able to add an aftermarket amp later on if I want. Oh and I also plan to add a powered sub to get that extra thump. I appreciate everyones input and hope I've started beneficial debate and information for everyone who's been apart of this thread.

ferrariowner123, is that a 240z because if it is I am so jealous!!!

Yeah I cant wait until I've figured everything and installed it, its going to sound amazing to me. I also plan to out in a powered sub later too and splice in into one of the rear speaker's wire. Ok so I still have a question about the front speaker setup. Since I am potentially going to get rid of the factory amps in the front and put crossovers in place, will adding an aftermarket HU do anything to increase the watts going to the new aftermarket component set making them closer to their true potential quality since the amps are not there? How much wattsRMS do aftermarket HU on average put out because Im wandering if it will be the rated amount that the aftermarket component speakers seek?

Yeah I'm not sure how to check polarity. Just look inside the harness adapters for what? Are you just looking to see both pins? Also, with having the rear speakers 2 ohm and the front ones 4 ohm with a new HU and no amps up front, will there be a significant difference in sound quality between the front and back of the car? I heard 4 ohm speakers are more bassier than 2 ohm.

Also thanks hawairish, you've been a lot of help. I commend your commitment in helping me!

Here is a photo of one of the rear speakers. Im not sure if this hints as to any information on the speaker's ohm level or RMS wattage so if anyone does know please say so?

Ok I'm a little confused. When I asked the Crutchfield advisors, they said according to their diagrams and such that the bose system for my pathy had 3 factory amps, one in each front door adjacent to the woofer and an amp in the cargo powering the rear speakers like I have said previously. I was also thrown off because leading up to that I thought the system just had crossovers splitting the signal and an amp in the cargo and that was it. With asking around though it seems like you can replace the front amps with a crossover so maybe thats why you were successful in doing so without having problems. Also in your picture, is that the rear amp in the very middle and are those the front amps/crossovers on the left and right? So what I'm asking is, is it worth it to go through all the hassle of replacing the headunit and either replacing the rear amp or bypassing it to get the little extra quality out of the rear speakers? Or will it significant change the quality because I'm guessing you have read this from the previous threads but I used JBL GX602 coaxial 2ohm speakers to replace the rear speakers and they sound good but they just are not loud enough I guess because of an increase in impedance but Im guessing the quality can sound a little better. I'm definitely going to replace the front speakers, since I will be switching the front amps out for crossovers, should I get 4 ohm components because the amp is not there with low ohm output or should I still get 2 ohm components because of the HU?

Ok so then what if I replace the factory front door amps with crossovers completely. Just have crossovers in place of the factory amps. I believe you were saying it's possible but is it very difficult? Also what were you saying about bypassing the rear amp? Were you saying even if you did bypass it the HU would still only put out 20wattsRMS? Should I replace the rear amp of bypass it, which would be better?

Ok so it seems like it will work, would carpgold send me all the hardware too and I'd send him mine?

Richmond, VA. Are you close? And which one do you have?

Ok I'm agreeing with just the components up front and aftermarket stereo install. I only have a couple questions left haha bear with me a little longer. What would you suggest I should tinker with equalization wise on whatever new aftermarket stereo I get? What categories i.e. treble, fader and things of that nature are the most important in shaping the tone and sound imaging? Finally,what exactly does the Scosche adapter do? I know you stated this already before but I couldn't quite follow. My questions is, why do I need it rather than not using it at all. Is there benefits to using it or is it a necessity for aftermarket radios in a system like mine?

I'm looking for the 2002+ se roof rack thats so sought after. I currently have the 2002 LE roof-rack and would like to swap or just simply buy the rack off someone completely. Anyone positive that a 2002-2004 se roof-rack will fit my 2002 LE roof? Preferably the one that says pathfinder down the side. Represent! But any response I value!

Haha I kind of got lost when duel voice coils was brought up but I get the overall just of what you're saying. Also yeah I agree with you about just upgrading the headunit for now which is originally what I was going to do but one of the crutchfield advisors claimed it would not improve my system by much because of the amps. So I'll be traveling down that path except I will be replacing the front speakers as well. If I'm installing a component set, I'll be able to use the factory front door amp with the new woofer and tweeter and just not use the crossovers at all right? Not using the crossover won't create any problems would it? Or should I just rip those god for saken front door amps out of there and replace them with crossovers because I'm confused as to if I rip those amps out will it affect the rest of the system like the rear cargo amp or anything? Lastly, does replacing the HU just add features to in turn use to improve the quality or does just installing it make the quality better by itself without messing with the features.

Ok things are starting to click. You're making sense but I wish I knew about this way to remove the factory amps completely before I bought those 2 ohm JBLs lol. So taking the rear amp out and just hooking the input to output wires will work. Home come I couldn't just simply replace the amp then with a better one? Also for the front ones, are you sure you can just put the crossover in the amps place, I doubt they have the same wiring that would work. Would pulling out all the amps and upgrading the headunit and replacing the front speakers with 4 ohm sound better than if I had the amps and an upgraded headunit but used 2 ohm speakers? So basically I'm asking which is better, 4 ohm for front speakers 2 ohm for back and no amps or 2 ohms for all speakers and the factory amps?

Btw thanks for sticking with me this long, you're really helping!

Ok well I used JBL GX602 coaxial speakers for the rear doors and they are rated at 2 ohms which I was led to believe is the same as the amp. But as I said before the volume still dropped. Second, I'm not sure if I have already told you this, I probable have but there are 2 amps in the front apparently. One in each front door powering each front speaker. Its literally adjacent to the woofer. Finally there is an amp in the rear cargo area powering just the rear speakers. This is just to give you the amp layout. But back to what you said about bypassing, that seems like a huge task, how is that easy. If i were to just replace the headunit and use the Scosche adapter and not bypass the amps would i still get a significant increase in speaker sound quality, like closer to the speakers full potential. Im still confused because I keep thinking no matter what is sent from the HU to the speakers, the amps adapt and just output the same amount of power as it did with the factory headunit. Is that a completely mislead statement?

Yes I have played with that but once I move the fader towards the rear speakers, the sound up front becomes less clear in quality and drops a tiny bit in volume each number I go in the rear speaker direction. I also heard using an outline converter drops some of the quality and clarity of the sound is this true, I'm wondering if its that noticeable or not. Also I use a tape aux converter as an aux chord for my phone and its static anyways when I increase the volume a lot while using the tape aux. Im wondering if when I replace the front speakers they will drop down in volume too just enough to where they match the back speakers so when I turn up the volume on the HU they both increase at the same level.

Also I want to be clear with what you said. So you're saying if i get an aftermarket stereo and install that with the Scosche adapter, I will be able to increase the sound coming out of the rear speakers even if there is a factory amp along the speaker wire between the HU and the rear speakers?

Yeah I used aftermarket wiring harnesses for the rear door speakers but the speakers sound clear up close when I put my ear to it but they just don't get loud enough to where if you were sitting in the back you would notice them. Mostly you just feel some of the bass and the sound coming from the speakers upfront. Also I noticed that the rear speakers make a kind of high pitch frequency that irritates your ears a very little bit when ever symbols are played in a song. Is this a result of bad connection or do you not know?

All the amps I mentioned are factory by the way.

Sorry guys didn't realize that was a big deal. Regarding the OEA-4 though, I had not thought about that. I have a factory stereo. Would replacing the stereo with an aftermarket change the quality and volume of the speakers because there is an amp in each front door powering the front speakers and an amp in the cargo area powering the rear speakers. Wouldn't changing the stereo to an aftermarket just cause the amps to adjust and still put out the same amount of ohms and watts as they did when the factory stereo was installed?

I have a 2002 Pathfinder LE with bose system and Ive heard there is an amp in the rear cargo area powering the rear door speakers. I have just installed aftermarket speakers to both my rear doors and even though they are 2 ohm speakers, they have still dropped in volume. I was wondering if the factory amp that powers the rear speakers has tunability so i can up the gain or something to up the volume on the rear door speakers. If this is possible can someone tell me where exactly it is and how to get to it, thanks! If the amp doesnt have tunability, what are some other ways to increase the speaker volume?

Yeah you are right about the factory setup Im pretty sure but when I was talking to a crutchfield assistant online, he said there were two amps in each front door individually powering each front speaker, I asked him if he was talking about the crossovers and he didn't really give a definitive answer. So this means I can change the front speakers to what ever component setup I want just as long as I correspond that to the headunit? Well what are the specs of a headunit to match 4 ohm 10-100 watt component speakers?