Broughton HPF LPF question

Discussion in 'Effects [BG]' started by J.Wolf, Jul 3, 2017.


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  1. J.Wolf

    J.Wolf Supporting Member

    Apr 29, 2003
    Asheville, NC
    Contributor- Bass Musician Magazine
    I'm interested in getting one of these for a couple reasons. I have and like using an HPF to tame the boom in a lot of rooms/rigs, and I have recently discovered that I like using a LPF to help me dial out some of the crispy treble, while keeping the upper midrange fullness that I like for fingerstyle playing and soloing.

    Question is: is the HPF as effective as my Fdeck V3? AND, does the LPF work in the way I mentioned? Can i use it to shelve out some of the string noise-y, hissy, clanky sound that is not readily tame-able with most traditional treble controls? How steep is the curve on the shelf?

    thanks for any input.
     
  2. PullThePlug

    PullThePlug

    Jan 8, 2014
    Sacramento
    I am also very interested in these details about the Broughton HPF/LPF. I love my F-deck series 1, but I'm looking for the same taming of top end that you are. Thanks for the post, hopefully we can get details soon.
     
  3. bass12

    bass12 Have You Met Grace Jones?

    Jun 8, 2008
    Montreal, Canada
  4. Azure Skies

    Azure Skies Commercial User

    Mar 21, 2012
    Toronto
    Businessman and EE Importer/Exporter Broughton Audio
    The HPF and LPF are both 12 dB per octave butterworth response filters. I use the LPF in the way that you describe: to filter out ultra high frequencies (string noise, fret buzz) but still keep the lower treble/upper mid frequencies.
     
  5. mmbongo

    mmbongo I have too many basses. Supporting Member

    You could also get a Mesa Subway D800+ amp, which has both functions built in. Just a tip there :)

    But if you need a pedal then Broughton is the way to go.
     
  6. guy n. cognito

    guy n. cognito Secret Agent Member

    Dec 28, 2005
    Nashville, TN
    When did the D800+ add an adjustable LPF???
     
  7. mmbongo

    mmbongo I have too many basses. Supporting Member

    Both Subway amps have an adjustable shelving treble control. The treble knob does not boost/cut a single frequency like other amps, it adjusts the 'knee' of the treble cutoff frequency.

    That being said, @agedhorse please check my work to make sure I'm not saying something stupid :)
     
  8. J.Wolf

    J.Wolf Supporting Member

    Apr 29, 2003
    Asheville, NC
    Contributor- Bass Musician Magazine
    I tried an 800+ it was pretty nice, but I went another route. Didnt realize the treble control on it was a shelf.

    I'll probably get it out of a pedal if I can, as Im pretty happy with my amp and rig at this point
     
  9. cavemanbass

    cavemanbass

    Nov 5, 2010
    I'm interested in Andy's reply on this, I read the manual for my D800 and think I would have remembered such an unusual HF control arrangement. My recollection is that it's a straight forward shelving circuit.
     
  10. mmbongo

    mmbongo I have too many basses. Supporting Member

    Yeah me too, because I'm sure I'm wrong in how I think the shelving circuit works. I don't think the frequency changes like I said it did, I think it's fixed at 4khz. But since it's a shelving filter, it boosts/cuts everything above 4khz, not just 4khz like a normal EQ. Is that how you understand it?
     
  11. cavemanbass

    cavemanbass

    Nov 5, 2010
    A HF shelving filter will boost or cut all frequencies above the cutoff, in a gradual way depending on the amount of boost / cut applied. With a corner frequency at 4k you're also cutting / boosting a bit down lower (maybe down to 2k). So any boost or cut will be audible in your bass tone, which is of course what the control is designed for.

    I'm just beginning to appreciate the beauty of a LPF (thanks TB!), being able to dial out spitty / clacky / noisy HF stuff while not affecting my bass tone. Since getting my HPF / LPF I find that I use the LPF more then EQ!
     
  12. Dave Hill

    Dave Hill Supporting Member

    Jan 9, 2005
    Atlanta, GA
    I use a Broughton L+HPF just as you describe. Works excellent. It replaced a Fdeck Series 1, which is also 12db/octave.
     
  13. J.Wolf

    J.Wolf Supporting Member

    Apr 29, 2003
    Asheville, NC
    Contributor- Bass Musician Magazine
    thanks guys, sounds like this is the ticket. Anyone want to buy an Fdeck S3? :-D
     
  14. Primary

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.

     
    Jan 22, 2022

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