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    ohms with passive xovers

    Ok, my 2ch amp is stable to 2ohm stereo/4ohm mono...

    Currently, I have a passive xover, left and right, both the mids and tweeters are 4ohms... does the amp see 2 ohms or 4 ohms?

    Also, I accidentally destoryed my tweeters, and so I wanna incorporate home tweeters in the car, like SEAS, dynaudio...

    SEAS are affordable to me and has had great reviews, but all the ones I've seen are either 6ohms or 8ohms. What difference in ohms would I be looking at if I linked them to the xover?



    Team Caraudio

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    Bass drive-by's are uncool.




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    maylar is offline Electrical Weenie



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    Re: ohms with passive xovers

    Originally posted by paikiah
    Currently, I have a passive xover, left and right, both the mids and tweeters are 4ohms... does the amp see 2 ohms or 4 ohms?
    Impossible to tell without knowing the details of your crossover network and characteristics of your speakers. Assuming you have lowpassed the mids and hipassed the tweets, then the only thing for sure is that at low and high frequencies the impedance is 4 ohms. At frequencies near the crossover points it gets very complicated.
    SEAS are affordable to me and has had great reviews, but all the ones I've seen are either 6ohms or 8ohms. What difference in ohms would I be looking at if I linked them to the xover?
    Crossover frequencies will be completely different and the impedance at high frequencies will be whatever the tweeter is.



    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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    paikiah's Avatar
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    Ok, thi sis all the info I got on the xovers...

    xover frequency : 3kHz@4ohms
    xover slope : 18dB/octave High pass
    12dB/octave Low pass

    Protection circuitry : Optical compression
    xover alignmnet : BUttewrworth
    Zobel network : effective @5.2kHz
    Series Notch FIlter [email protected]

    it's got tweeter level matching to -3dB


    well, if the xover is made for 4ohms, then the xover frequency of the tweeters would be way off with a higher ohm, right? ****, looks like maybe I gotta get someone to build a xover for me again... back to the PA shops...



    Team Caraudio

    Sony C90, 210 EQ
    Seas 27TDF/C, RE XXX 6.5, custom xo (dyn 240GT sitting idle)
    RF 60.2 amp
    eD A15.22
    Soundstream picasso 1400.1D

    Bass drive-by's are uncool.

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