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Reload Thread: Factory amp vs Kenwood headunit amp?

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    superquest's Avatar
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    Factory amp vs Kenwood headunit amp?

    My son has a 97 Avalon with a factory amp that pushes the 4" component set up in the front and rear doors. I have no idea what the RMS is on the amp but have been told probably no more than 10-15 watts rms per channel. Wouldn't even a factory amp put out a cleaner sound than a aftermarket headunit? The headunit is on the way and is the Kenwood KDC-352U. It has front, rear, and sub pre amp outputs.

    So my question is should I bypass the new Kenwood headunit and hook up the factory amp or bypass the factory amp and use the 22 watts rms that the Kenwood headunit provides?



    Vehicle: 1986 Olds 98 sedan
    Headunit: Kenwood Excelon KDC-X396
    Front dash: 3.5's Sound Ordnance™ P-35
    Rear deck: 6.5's Kenwood KFC-G1620
    Subwoofers: two 10" Kenwood KFC-W2513PS
    Sub amp: 500 watt Kenwood KAC-8105D
    Amp wiring: EFX 8 guage
    Box: sealed Sound Ordnance




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    Re: Factory amp vs Kenwood headunit amp?

    here's what i did on my Bose factory amp, when i replaced my head unit, i changed my 4 door speakers and bought a little 4 channel amp to power the doors, i left the factory amp to run the tweeters on the car.

    i also added a sub amp to run the sub.




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    Beatin''s Avatar
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    Re: Factory amp vs Kenwood headunit amp?

    factory amp > head unit all day long.



    All day I'm clippin'
    voltage be dippin'
    I don't give a damn,
    cause my trunk always hittin'!

    creating a proper sound wave. Step one, turn it up until clipping. Step two, done.

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    Re: Factory amp vs Kenwood headunit amp?

    will depend on if that factory amp has crossover setting built into it. if your factory amp does have crossover settings built into you wont have a choice.



    Here is my feedback Thread: http://www.caraudio.com/forum/showth...ght=fasfocus00

    "If you ain't cheatin', You ain't trying"

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    Re: Factory amp vs Kenwood headunit amp?

    Realistically, if measured by industry standards, Kenwood and most other head units provide about 15-18 watts RMS per channel, and that's if the voltage is at 14.4 (rarely possible with flimsy factory wiring to the battery as well to the head unit). Having said that, I wouldn't shed any tears over disconnecting a decade old factory amplifier. Of course, getting an aftermarket amplifier is much better.




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    Re: Factory amp vs Kenwood headunit amp?

    I can almost guarantee that the head units built in amp will be louder and sound better




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    Beatin''s Avatar
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    Re: Factory amp vs Kenwood headunit amp?

    Quote Originally Posted by T 2 View Post
    I can almost guarantee that the head units built in amp will be louder and sound better
    Can I have some of the crack you're smoking? Seems like good stuff......



    All day I'm clippin'
    voltage be dippin'
    I don't give a damn,
    cause my trunk always hittin'!

    creating a proper sound wave. Step one, turn it up until clipping. Step two, done.

  8. #8
    SounDrive's Avatar
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    Re: Factory amp vs Kenwood headunit amp?

    Quote Originally Posted by Beatin' View Post
    Can I have some of the crack you're smoking? Seems like good stuff......
    Please tell me what kind of factory amp (minus some of the newer Bose/Sony/etc systems that come stock in some cars) are worth half a shit. Every stock amp I've replaced has been blown out of the water by a HU's built in amp




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    Beatin''s Avatar
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    Re: Factory amp vs Kenwood headunit amp?

    Quote Originally Posted by T 2 View Post
    Please tell me what kind of factory amp (minus some of the newer Bose/Sony/etc systems that come stock in some cars) are worth half a shit. Every stock amp I've replaced has been blown out of the water by a HU's built in amp
    from what I understand, most factory amps dating all the way back to the early 90's can do 20+ watts rms clean per channel. HU's typically are rated around 15wrms per channel but much higher distortion, around 1-3% THD. So many HU's can only really do 10-15wrms clean. That's weak as fuck.



    All day I'm clippin'
    voltage be dippin'
    I don't give a damn,
    cause my trunk always hittin'!

    creating a proper sound wave. Step one, turn it up until clipping. Step two, done.

  10. #10
    SounDrive's Avatar
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    Re: Factory amp vs Kenwood headunit amp?

    Quote Originally Posted by Beatin' View Post
    from what I understand, most factory amps dating all the way back to the early 90's can do 20+ watts rms clean per channel. HU's typically are rated around 15wrms per channel but much higher distortion, around 1-3% THD. So many HU's can only really do 10-15wrms clean. That's weak as fuck.
    I guess it depends on the vehicle. Like I said, each time I've installed a HU it was a great improvement over the stock amp.




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    Re: Factory amp vs Kenwood headunit amp?

    A factory amp without a step-up power supply will have the same power as a HU. You can only get so much from 12 volts.

    The difference is that factory amps usually have crossovers to protect the speakers. That limits how much midbass you can get from the OEM front stage, and it's what drove me to replace mine with aftermarket. When I ran my system directly from the HU I got an overall improvement in SQ but the power level (volume) was the same.



    dave
    ----------
    1999 Buick Park Ave Ultra
    Head Unit: JVC KWHDR720
    EQ: Audiocontrol EQL
    Front Stage: Hybrid Audio Technologies Imagine 5.25 mids, Morel Maximo tweets
    Sub Stage: Boston G3 10", 0.5 cu ft sealed
    Amp: PPI Phantom 900.4
    Rear Fill: Boston SE953 6X9's

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    Re: Factory amp vs Kenwood headunit amp?

    Quote Originally Posted by Beatin' View Post
    from what I understand, most factory amps dating all the way back to the early 90's can do 20+ watts rms clean per channel. HU's typically are rated around 15wrms per channel but much higher distortion, around 1-3% THD. So many HU's can only really do 10-15wrms clean. That's weak as fuck.

    In the 90s, the sound system would have to be "premium" to give you anything more than 5-10watts RMS, and then they often had bizzare sound enhancing features, like silent bass boosters, bass reducers, etc.




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    Re: Factory amp vs Kenwood headunit amp?

    wife's '03 G35's factory amped bose system is extremely weak, it's not clear or loud. I pulled one of the tweets out of it the other day because I thought it wasn't working, it was but it looked like something out of a transistor radio. My '05 f250's factory system put it to shame.



    '05 F250 King Ranch Crew Cab 4X4 Off Road Modded Powerstroke
    Rebuild in process
    Pioneer DEH 80PRS
    Modded Linear Power LP4753IQ
    Front Woofer: Infinity Kappa Perfect 6.5"
    Front Tweeter: SEAS Neos in pods
    Back: Pioneer TS-D6802R
    Knukonceptz Karma 12ga
    Stinger HPM3 RCA's
    Big 8: PhoenixGold Oga

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