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Anybody know if the Ampeg PF350 has a built in HPF

Discussion in 'Amps and Cabs [BG]' started by Stewie, Jul 14, 2021.

  1. Jul 14, 2021 #1
    Stewie

    Stewie

    Jul 3, 2013
    Near Boston
    …..and if it does, at about what frequency does it start to cut? I have an Fdeck HPF but need to know if I need to use it. Thanks in advance
     
  2. Jul 14, 2021 #2
    jeff7bass

    jeff7bass Inactive

    Apr 9, 2009
    Not sure about the HPF the the limiter kicks in when you push it, even when it's off. I had an early one though so the newer ones might be different.
     
  3. Jul 14, 2021 #3
    superheavyfunk

    superheavyfunk

    Mar 11, 2013
    Toronto
    I’m gonna go ahead and say “no it doesn’t”
     
  4. Jul 14, 2021 #4
    JimmyM

    JimmyM Supporting Member

    Apr 11, 2005
    Apopka, FL
    Endorsing: Yamaha, Ampeg, Line 6, EMG
    It goes pretty low so if there is one, and there might be, it doesn't cut much low end off.
     
    MarkA likes this.
  5. Jul 14, 2021 #5
    agedhorse

    agedhorse Supporting Member Commercial User

    Feb 12, 2006
    Davis, CA (USA)
    Development Engineer-Mesa Boogie, Development Engineer-Genzler (pedals), Product Support-Genz Benz
    There is a 2nd order HPF present, looks pretty low.
     
    MarkA, Jazzdogg and BasturdBlaster like this.
  6. Jul 15, 2021 #6
    Sparky Mark

    Sparky Mark

    May 8, 2008
    United Kingdom
    Use your ears in any particular situation to decide if it's needed. I find it's more dependent upon the venue conditions than the amplifier. I always take mine along.
     
  7. Jul 15, 2021 #7
    Stewie

    Stewie

    Jul 3, 2013
    Near Boston
    Not about tone, asking for the sake of protecting a wonderful, but delicate loudspeaker. And no, the PF350 doesn’t seem to have much in terms of an HPF circuit. It’s getting harder and harder to avoid pulling the trigger on a Mesa 800+
     
    Last edited: Jul 15, 2021
  8. Jul 15, 2021 #8
    Sparky Mark

    Sparky Mark

    May 8, 2008
    United Kingdom
    If you are concerned with protecting a delicate speaker from damage by low frequency signals then you should definitely always use your HPF. I'm not sure changing to a significantly more powerful amp is going to help protect your speaker? It's an interesting approach though.
     
  9. Jul 15, 2021 #9
    Jazzdogg

    Jazzdogg Less barking, more wagging!

    Jul 29, 2006
    San Diego, CA
    Use your FDeck, and your ears, until you buy an amp equipped with a variable high-pass filter. I won't gig without one!
     
    Sparky Mark likes this.
  10. Jul 15, 2021 #10
    Stewie

    Stewie

    Jul 3, 2013
    Near Boston
    I’m not as dumb as you seem to think. I was asking if there was an HPF, and if there is, at what frequency. If there was one at say 40 hz, I wouldn’t need an Additional HPF. At the 2 ohm setting, a Mesa 800+ probably has similar power to an eight ohm speaker as my PF 350. I don’t play loud enough to worry about the speaker except for the excursion possible at very low frequencies. The Mesa has a variable HPF built in, saving setup time and extra complication, not to mention likely sounding way better than my little Ampeg, but thanks