Join Date: Jan 2003
Location: Escondido, California
For your stock receiver or aftermarket deck without an aux amplifier, the key to getting speakers that will sound good is to insure they are matched to the low power output by the OE receiver and any aftermarket deck. 18-22 or so watts (RMS) is about as much as any receiver or deck by itself puts out... not nearly enough power to drive all the possible speakers that can fit your TJ.
So as long as you keep this one specification in mind when buying speakers, you'll be happy with your choice... and that specification is called 'Sensitivity'. The higher the speaker's Sensitivity rating in dB (decibels), the better it will sound with a low power system. Stay with speakers that have AT LEAST 90 dB of Sensitivity and your system will be able to drive them to adequate sound levels to make most anyone happy. Lower Sensitivity than that and you'll have to turn the volume up so far that the amplifier will likely start sending a distorted signal to the speakers.
Speaker size-wise for the front, I would stick with a 5.25" round coaxial speaker up front, so buy 4x6" to 5.25" speaker adapter plates so you can mount them in the Jeep's front 4x6 opening. For the rear speakers, I'd go with 6.5" to replace the OE 5.25". Little or no modifications will be needed to mount the 6.5" speakers in the 5.25" openings because the speaker's shape will allow it to rest in the 5.25" opening and be held in place by screws and the cover.
Remember... speakers with a 90 or higher dB Sensitivity rating. Pay no attention to the speaker's wattage rating... a speaker that says 500 watts on the box is designed for a high power amplifier so it won't sound as good or as loud as a speaker rated to, perhaps, 125 watts that is designed for a lower power amplifier. The wattage rating only means how much power it can handle without blowing, not how loud it will be at a given power level as provided by the deck.
When you have a choice, buy American made.
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