HPF Power Handling / Rating

Discussion in 'Amps and Cabs [BG]' started by batflash, Jun 14, 2020.

  1. batflash


    May 11, 2020
    Hi all,

    Since as you go up in frequency, power output reduces. If you're selecting a HPF for 2.5khz to use in a speaker cab on the HF Driver with a 500w amp, would you need that HPF to be able to hand 500w, or would you need it to hand the power output that's needed for that frequency bandwidth?
    Just to throw a number out there, 125w rms.

    My guess is you're converting the power to heat, so you'd need the HPF to handle the power pushed for the frequencies not utilized.

    Thanks for the help.
    Last edited: Jun 14, 2020
  2. Passinwind

    Passinwind I know nothing. Commercial User

    Dec 3, 2003
    Columbia River Gorge, WA.
    Owner/Designer &Toaster Tech Passinwind Electronics
    Judging from the frequency he mentioned I think this is a passive crossover application. ;)
    S-Bigbottom and Stumbo like this.
  3. batflash


    May 11, 2020
    That is correct. I'm talking about using an HPF on a cab assembly. Edited the OP. Thanks again.
  4. agedhorse

    agedhorse Supporting Member Commercial User

    Feb 12, 2006
    Davis, CA (USA)
    Development Engineer-Mesa Boogie, Development Engineer-Genzler (pedals), Product Support-Genz Benz
    Different components in the crossover have different power dissipation values depending on the design of the particular crossover,

    Generally, the crossover needs to be able to dissipate roughly 3x - 4x the RMS rating of the HF driver. Since the average HF driver has roughly 20 watts power handling (yes, many manufacturers do not rate HF drivers with realistic numbers in this context), that would equate to a total power handling of the HP section to between 75 and 100 watts.

    That said, understanding that there are different ways to express these ratings. Not understanding these details can lead to incorrect conclusions.
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