Unless your speakers have power amps built in, they don’t have any. The watts of your factory installed car stereo will influence the performance of your speaker. That’s usually not enough power to overcome road noise without sounding shrill. Good power, but it pales in comparison to a strong external car amplifier. This misunderstanding is caused by the difference between peak wattage and RMS wattage.Ī more powerful 200-watt aftermarket stereo, for example, probably gets its power from an amp chip rated at 50 watts peak by 4 channels, and its real world RMS rating is probably in the neighborhood of 15-18 watts per channel. Most standard factory car stereos usually have no more than about 10 watts RMS maximum output power per channel. To find out the power of your head unit, type in the make and model to google search. Most times, the wattage is low, somewhere around 8 to 10 watts RMS per chanel. It is very important that you know the wattage of your car stereo.
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