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<blockquote data-quote="SlamSession" data-source="post: 3200328" data-attributes="member: 579067"><p>You would have to know the impedance of the speakers.&nbsp; To find out you would have to get a multimeter and measure the ohms or impedance of the speakers.&nbsp; While you&#039;re at it check for proper connections.&nbsp; Chances are you are going to have to buy aftermarket speakers that are rated to operate at 4 ohms.&nbsp; Don&#039;t buy Component Speakers, unless you plan on purchasing a 4 channel amplifier.&nbsp; The vehicle is around 13 and a half years old, so unless the speakers were changed, that&#039;s how old the speakers and speaker wires are.&nbsp; If you log on to Crutchfield.com their website will ask you info on your vehicle, like year and make and model and it will show you the speakers that fit in your Toyota&#039;s door and stuff.&nbsp; For example for your front doors Crutchfield.com suggests the Alpine SPS-13C2 for $90.00 or the Alpine SPR-13C for $150.00 both of those models are rated at 4 ohms impedance, which is what your head unit was designed for.&nbsp; The main difference between those two models is that the 13C2 handles 35 watts RMS(root means square) and the latter handles 90 watts RMS.&nbsp; Many car audio manufacturers show you whats called the Peak Power Handling and that can be misguiding to a novice.&nbsp; The reason is because what Peak Power Handling really means is what a speaker can handle in one short burst of power.&nbsp; So what we all have to look for is Continous Power Handling.&nbsp; Prolonged use at Peak Power will blow the speaker.</p></blockquote><p></p>

[QUOTE="SlamSession, post: 3200328, member: 579067"] You would have to know the impedance of the speakers. To find out you would have to get a multimeter and measure the ohms or impedance of the speakers. While you're at it check for proper connections. Chances are you are going to have to buy aftermarket speakers that are rated to operate at 4 ohms. Don't buy Component Speakers, unless you plan on purchasing a 4 channel amplifier. The vehicle is around 13 and a half years old, so unless the speakers were changed, that's how old the speakers and speaker wires are. If you log on to Crutchfield.com their website will ask you info on your vehicle, like year and make and model and it will show you the speakers that fit in your Toyota's door and stuff. For example for your front doors Crutchfield.com suggests the Alpine SPS-13C2 for $90.00 or the Alpine SPR-13C for $150.00 both of those models are rated at 4 ohms impedance, which is what your head unit was designed for. The main difference between those two models is that the 13C2 handles 35 watts RMS(root means square) and the latter handles 90 watts RMS. Many car audio manufacturers show you whats called the Peak Power Handling and that can be misguiding to a novice. The reason is because what Peak Power Handling really means is what a speaker can handle in one short burst of power. So what we all have to look for is Continous Power Handling. Prolonged use at Peak Power will blow the speaker. [/QUOTE]

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