HELP: cabinet buzzing

Discussion in 'Amps and Cabs [BG]' started by Camarillo, Dec 12, 2022.

  1. Hey guys
    I have "inherited", so to speak, a couple of Ashdown cabinets.
    It should be the entry level series I guess.
    1 RM-MAG-115 rated at 250W - 8 ohm
    1 RM-MAG-212 rated at 250W - 8 ohm
    Attached to a MarkBass Nano 300 I can notice 2 things:
    1- the volume is not so much, even with both cabinets in parallel using the full 300W at 4 ohm
    2- a weird buzzing/distorting sound. This happens less at low volume, of course, and much more at higher outputs. This seems to happen on specific frequencies: a lot on F# in every octave, a little less on G an so on. More in the 212 alone than on the 115 alone.
    What's happening here? It's a bad amp/cabinet match? Did a blow the cones (it doesn't sound as a blown cone to me, the distortion is different)?
    I read a thread here about the piezo tweeters of these cab series. Could it be that?
    Sorry for the poor smartphone video, but it's useful to get the perception of what is happening.
  2. basscooker

    basscooker Commercial User

    Apr 11, 2010
    Northern KY
    Cab fan, hobbyist
    I'm BARELY hearing anything unusual with my phone speakers, so I might be missing something.

    What I can hear just sounds sympathetic. Give all the screws you can check a bit of a try for a loose one. Are the grills metal? See if there's any metal touching the cab. There should be some kind of fabric or foam between it.

    Is this confirmed with each cab alone? If it's the same on both cabs alone odds are the amp is still on the table as the culprit. Confirm the amp is ok through another cab. Try the cabs with another amp. Play in a different room. Sit on the cabs while playing. Take them outside and test it.
    MaxSpinrun and Old Garage-Bander like this.
  3. saltydude


    Aug 15, 2011
    boston CANADA
    When I experienced some cabinet buzzing it’s usually been the handle or handles.
    Pi_Husky and Aqualung60 like this.
  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
    Try it outside to eliminate the potential issue of things in your surroundings vibrating.
  5. Does this happen with each cab by itself?

    Lower than expected volume may be due to low cab sensitivity/SPL.
    What other cabs do you use that are louder?

    Honestly, I heard more as what I'd describe as "clanky" sounding bass. Possibly some muting issues?
    There may have been a couple of instances that might have been speaker buzz, or farting out.
    You may just be trying to push too much low end at speakers that might not be able to take it.

    Just because a speaker is rated for X amount of power, doesn't mean it can handle that much power across the full bass spectrum. Speaker power usually gets derated significantly at the lower end of it's range. Speaker power ratings are usually the thermal rating. How much it can take without burning out the voice coil. At the low end of the range, the power concerns are more about moving the voice coil beyond its physical limits. It is possible to exceed those mechanical limits without ever approaching the thermal limits usually specified in speaker power ratings.
    Camarillo and Giraffe like this.
  6. Murch


    Jan 14, 2020
    Hamilton, Ontario
    One thing that I don't think has been mentioned yet is that the 2 cabinets may be out of phase with each other, which could be causing the perceived lack of volume.
  7. Probably not the case given they are both from the same manufacturer. But OTOH, who knows if some schmuck rewired one of them? So not a bad idea to keep in mind after all.
    Plain Old Barry, Murch and agedhorse like this.
  8. Grills are not metal, they’re fabric.
    I removed the 212 grill, but seems impossible to do remove the 115 one. Anyway the 212 is the noisiest one and nothing changed.
    Confirmed noise is on both cabinets, more on the 212 than the 115. Ill try to change positioning and sit on them. I don’t have another cabinet handy right now, but I’ll try to find one.
    basscooker likes this.
  9. It’s from the cabinet for sure. That video was recorded in the vocal booth of a studio, a
    controlled environment with nothing vibrating.
  10. The EQ on the amp was flat, all at noon.
    The bass sound was clanky because of that, it’s not a sound I like or I would use. Pushing the bass to my likings gets things worst.
  11. jimmydean


    Mar 14, 2009
    First of all , tighten all the screws (speaker(s)corners) and invest in a Auralex isolation speaker pad .
    Camarillo likes this.
  12. JeezyMcNuggles

    JeezyMcNuggles Supporting Member

    Feb 23, 2018
    Santa Maria, CA
    I suck, but nobody really notices
    It's the grille and/or the logo plate.

    I just removed my grille on my abm 15 because of this.

    100% solved. I hate metal grilles. For that reason. 20220913_185803.jpg 20221211_180853.jpg

    My 210 hasn't started doing it yet, but it will sometime. Then, same.

    But, take the grille off and see if it still happens
    red_rhino likes this.
  13. red_rhino

    red_rhino Currently on Double Secret Probation Gold Supporting Member

    Jan 26, 2001
    Over Macho Grandé
    That would be my suspicion as well. Had this happen with a GK MB210 combo with a metal grill. My solution was putting a layer of electrical tape along the outside edge of the grill so that it seated more snugly into the cabinet frame. Sort of like a gasket. (The noise was the vibration of the grill against the cabinet frame. The resonation was side-to-side against the frame where the grill was seated, not against the face of the cabinet, so it didn’t matter how much I tightened the screws.) Problem solved.
    Pauly 4001 and JeezyMcNuggles like this.
  14. JeezyMcNuggles

    JeezyMcNuggles Supporting Member

    Feb 23, 2018
    Santa Maria, CA
    I suck, but nobody really notices
    I tried on mine, with little success. But, with the grille off, it wasn't there. So, I decided to fix the problem.
  15. agedhorse

    agedhorse Supporting Member Commercial User

    Feb 12, 2006
    Davis, CA (USA)
    Development Engineer-Mesa Boogie, Development Engineer-Genzler (pedals), Product Support-Genz Benz
    Read carefully guys, he removed the 212 grille completely with no change.
    Camarillo, lowendrv and red_rhino like this.
  16. beans-on-toast


    Aug 7, 2008
    Since both cabs are doing this, try another amp to eliminate that possibility. The sound is coming out the speakers but it could be generated within the amp.

    Don’t place the amp on the cabinets when performing the tests.

    Check that the phase of the two cabinets together is correct.
    agedhorse likes this.
  17. lowendrv


    Dec 12, 2007
    Wonder if he brought the cab outside yet ?
  18. That’s definitely the first thing I think of when it’s a particular note that sets it off. I can’t practice in the same room a my server cabinet, because it resonates at G.
    BassNugget, agedhorse and Aqualung60 like this.
  19. Aqualung60


    Jun 19, 2013
    New Jersey
    I had this problem once, after my daughter moved out I turned her room into my practice space. Immediately started to hear a buzzing noise that I swore was coming from one of my cabinets so I went about tightening every screw I could find on the cabinets with no luck stopping the buzzing. Then one day I happened to be standing in near the heat vent and put my foot against it while playing and the buzzing stopped. Never overlook the possibility of an "Environmental" cause.
    red_rhino, BassNugget and agedhorse like this.
  20. Relsom

    Relsom Supporting Member

    Nov 23, 2013
    The Old Dominion
    Sounds pretty good to me. I had a few ABM Mini cabs some time back. The boxes and hardware items themselves were solid, but I felt that the drivers were straining to keep up. It seemed like the cones were farty, for lack of a better term. OTOH, I tried a Gladstone Lil G. It was nothing more than a very loud kazoo. Literally everything attached to it would rattle or wheeze without even getting anywhere past bedroom level. I really wanted it to work out. I think he had misplaced his tape measure, t-square, and center punch the day that one was put together. Just awful.
    I don't hear anything offensive in the OPs recording.
    Last edited: Dec 13, 2022