RMs Electronics

All these negative Nancy's on here. Lol. You can run any speakers you want. Only time you have to worry about ohms is with subwoofers. Unless your changing the wiring & bridging your mids & highs amp? Which I dont know why someone would do? Typically house stereos are 8ohms. Car Audio 4ohms. Subwoofers .5 - 4ohms single, dvc, & quad coils. Thats where ohms come in. When you run series parallel or up! And you are bridging a subwoofer. A car speaker will be fine if ohms are a little different. Just don't run factory amps or aftermarket below 1ohm. Unless stated otherwise. But with highs, & midrange. You will never have to do that. They don't make dvc highs. You'll be ok. Every stereo is upgradeable. Trust me!! And everything & anything is possible now n days. 

On 8/17/2011 at 11:22 PM, pj8708 said:

I know your not going to like this answer, but unfortunately or not, riping and replacing speakers is not a good idea. You'll end up with a really unbalanced mess and a disappointing end result.

The Lexus system is made up of a series of matched and balanced crossovers and specific impedance speakers that are in turn, married to a matched amp. When you stick in a speaker willy-nilly it will not match that crossover network and sound like crap.

That being said, I was able to add a small sub to my 2010 ES in the trunk, with a separate amp to improve the bass line. It really filled out the bottom and made the whole system sound better. Other than that, there is not a car audio shop in my city that will touch a Lexus when it comes to ripping out OEM equipment and putting in after market speakers and crossovers. If you still want to try it, just make sure your new speaker is the same impedance as the OEM so you don't blow the amplifier.

Let us know what you do.

All these negative Nancy's on here. You can run any speakers however you want. Just don't bridge a factory amp below 4ohms. Aftermarket are rated as needed. Im pretty sure if your just replacing factory with new. Ohms will be fine. Just don't change the way its wired. Ouse woofers normally run 8ihms. Car audio 4ohmd. Subwoofers can go down below 1ohm. But those are also doc's and up. No tweeters or midrange speakers are dvc. And if so its pointless. No car manufacturer has a stereo thats impossible to replace either. These days anything & everything is possible.