Do horn settings affect the speaker output?

Discussion in 'Amps and Cabs [BG]' started by prater, Nov 18, 2015.

  1. prater


    Aug 4, 2011
    I just picked up an Ampeg SVT 210 HE and it has a three position horn selector. The positions are "Off" "-6" and "0"

    I find that the off position results in far more highs than the other two and "0" seems to be the best sounding to my ears.
  2. Steve Dallman

    Steve Dallman Supporting Member

    It could be that the horn is wired backwards, causing common frequencies to be cancelled out. Reversing the wires on the horn would fix it.
    /\/\3phist0 likes this.
  3. B-string

    B-string Supporting Member

    Sounds like the control is wired backwards (miss-build).
    Arjank and AstroSonic like this.
  4. Intuitively, that does sound backwards. But then I would ask... Does "off" mean horn off, or does it mean horn attenuator off? Attenuator off would result in more high frequencies.
    Also, the horn setting should, in theory, have little or no affect on the other drivers.
  5. B-string

    B-string Supporting Member

    Good point, I don't claim to know if LOUD Tech decided to go "against the grain". Generally when you see a "-6" it implies -6db from full output (0db being no change to output level).
    Arjank likes this.
  6. two fingers

    two fingers Opinionated blowhard. But not mad about it. Gold Supporting Member

    Feb 7, 2005
    Eastern NC USA
    Yeah I imagine it's backwards. It would be counterintuitive to label it for more or less attenuation rather than more or less volume output from the tweet itself.
  7. Have you tried holding a mirror up to the switch to see if it makes more sense? ;-)
  8. prater


    Aug 4, 2011

    Here is a picture of the back of the amp. I assume Off means the attenuator is off but I'm not really sure what that means for the horn.
  9. Jim Carr

    Jim Carr Dr. Jim

    Jan 21, 2006
    Denton, TX or Kailua, HI
    fEARful Kool-Aid dispensing liberal academic card-carrying union member Musicians Local 72-147
    Usually off means -∞ , no?
  10. B-string

    B-string Supporting Member

    Off should mean off, as in no horn operation. Note it says -6db and 0db.
    David Jayne likes this.
  11. prater


    Aug 4, 2011
    In the off position the cab seems way more sensitive to highs such as fret buzz, string noise, in the zero position everything sounds more balanced.
  12. Foz


    Jul 26, 2008
    Jax FL USA
    Maybe off means the attenuation is off - just to shag with you [and us].
  13. Try this: with your bass unplugged turn your amp up loud and crank the treble up some. You'll get a hiss. It should then be easy to tell what the switch does.
    SirMjac28 likes this.
  14. FunkHead

    FunkHead Supporting Member

    Mar 10, 2007
    It's wired correctly. Off means the attenuator is off ie; Not attenuating.
  15. prater


    Aug 4, 2011
    So when the attenuator is off what does the horn do?
  16. /\/\3phist0

    /\/\3phist0 ( ͡° ͜ʖ ͡°) mmm Woody! DHDIK? Sweet Treets. Supporting Member

    Apparently from your description it means no attenuation IE: full output.
    And 0db = 0db (no output)
  17. Arjank


    Oct 9, 2007
    Above Amsterdam
    Ampeg PF-115HE Owner's Manual (Page 3 of 4)

    Although this isn't the manual of your model it is an ampeg.

    According to Ampeg (and what seems the most logical to me and is what other companies use):
    • Full high frequency output (0 setting)
    • High frequencies reduced by 6 dB (–6 setting)
    • Horn shutoff (off setting)

    This means that in the "off" setting the horn shouldn't do a thing, so it seems the wiring is faulty.
    Last edited: Nov 19, 2015
    B-string likes this.
  18. anderbass


    Dec 20, 2005
    Phoenix. Az.
    Maybe they're ploying us to tune with our ears, instead of eyes...
  19. Jaco who?

    Jaco who?

    May 20, 2008
    Since the switch description right above it says: High frequency attenuator, it looks to me like it's wired correctly, Old Garage-Bander is right. Sometimes the correct answer is right in front of your face.
    BrBss likes this.
  20. Arjank


    Oct 9, 2007
    Above Amsterdam
    3-position attenuator.png
    B-string and 1954bassman like this.

Share This Page