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    question about running components and sub with one 4ch amp

    I am thinking about running an Image dynamics CSX 2ohm component system and one 4 Ohm 10" Subwoofer.

    I am looking at the Hifonics HFi100.4 Amp.

    Question is can I run the 2ohm components and the 4ohm sub all on this one amp. Could I just bridge the 3 and 4channels to run the sub?

    Here are the specs on the amp:
    HFi Series 4-Channel Class A/B Car Amplifier
    RMS Power Rating:
    4 ohms: 100 watts x 4 chan.
    2 ohms: 200 watts x 4 chan.
    Bridged, 4 ohms: 400 watts x 2 chan.
    Max power output: 800 watts
    Pulse Width Modulated (PWM) MOSFET power supply
    LED power (blue) and protect (red) indicators
    Variable Bass Boost (0 to +12 dB bass boost at 45 Hz)
    Blue illuminated Hifonics badge
    Soft start sound function
    4/3/2 channel operation
    Preamp RCA outputs to daisy chain multiple amps
    4-Way System Protection circuitry (thermal, overload, DC, and speaker short protection)
    Tri-mode speaker operation
    Heavy duty aluminum alloy vented heatsink for maximum heat dissipation
    Silver nickle-plated RCA level inputs
    Silver nickle-plated screw terminals
    Input sensitivity:
    Variable level: 200mV-6V
    Variable high-pass filter (60-12,000 Hz, 12 dB/octave)
    Variable low-pass filter (30-250 Hz, 12 dB/octave)
    Damping factor: >180
    Frequency response: 30-12,000 Hz







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    Re: question about running components and sub with one 4ch amp

    yes you can. I wouldn't be surpised if your amp gets really hot after running it loud for 10min or so. Not just that amp, my experience with 4ch amps is they all get hot. never had one shut off on me though.



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    Re: question about running components and sub with one 4ch amp

    The plan is fine. But with speakers of that caliber I would prefer a higher quality amp.

    With all channels at min impedance I wouldn't be surprised if you have thermal issues running at high volume for extended periods of time.




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    Re: question about running components and sub with one 4ch amp

    What amp would you recommend to do this?




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    Re: question about running components and sub with one 4ch amp

    If you bridge two of the channels for the sub, does that change the ohm's?

    Thanks!




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    Re: question about running components and sub with one 4ch amp

    Quote Originally Posted by roswell630 View Post
    If you bridge two of the channels for the sub, does that change the ohm's?

    Thanks!
    I really don't know what caused the confusion about this in the last few years. I guess it comes from people pointing out that bridging an amp into 4 ohms gets you the same power as running it at 2 ohms stereo.

    But no.
    How could something like that just change??

    You have an amp -- it's minimum stable impedance in stereo is 2 ohms. Mininum stable bridged impedance is 4.
    How is that confusing?




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