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  1. #1
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    Question How to prevent speakers 'booming'?

    Which frequencies I have to soften to prevent the speaker to 'boom'?

    The speakers distance from the back wall is 15 cm, and one of them is 13 cm to the right wall (cannot do anything on this). They are rear vented.

    I've plugged-in the bass reflex port plugs, it helped but not that much.

    Thanks

  2. #2
    Made in KY Seas-man's Avatar
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    Ideally you need to move them out from the walls more than they are. Outside of that... there are few options.

    You could try using some kind of digital room correction or analog graphic equalizer in your system and see if that helps.
    I think the problem frequencies are somewhere between 50HZ to 100HZ

    You could also try to change the acoustic environment in your listening room by using bass traps to help absorb the trouble frequencies...if you had the room for them.
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  3. #3
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    I'll try to soften those frequencies then, until 125 Hz.. will not go further.
    I cannot really spend money so a real hardware equalizer is out of question.. I would cut them on the source.

    Thanks

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    You did not say what kind of speakers they were. That could affect your options. In general however, you can raise them off the floor if you can't move them away from side or rear walls.

    Room boundary effect doesn't really care if it is back wall, a floor or a side wall (or even ceiling). All positions will increase bass response disproportionately, and they all reinforce each other. (A back wall and a side corner is worse than just a back wall, and a back wall, side corner and floor is the worst* of all.)

    (*Keep in mind a few speakers are designed with that position in mind, the full size Klipschorns are a classic example. However, most speakers perform better if they away from walls and floors.)

  5. #5
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    They are Energy Speakers C-100: http://www.energy-speakers.com/v2/pr...age.php?id=294

    I'm beginning to think that the problem is just the speakers since mine old Tannoys does not sound that bad at all (and the distance from the wall is even shorter). Maybe these Energy are badly engineered? Or have too little boxes?

    P.S.: When regulating the bass response from the amplifier, when I lower it, which frequencies does it touch? And does it lower all frequencies equal or does it lower some frequencies more than the others?

  6. #6
    Forum Regular audio amateur's Avatar
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    I thought you had Monitor Audio speakers?

  7. #7
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    Nope, cancelled the order and gone with these instead (in the rush with the bad advice of mine wife). Hope that with the Canadian amplifier they will sound good (heard that NAD like PSB, these Energys must be similar I think).

    I auditioned them and in the store they sounded good (better than Polk and far better than Boston.. they were more flat sounding, better balanced and laid back, I don't know why italians stores sell all those american speakers and japanese amplifiers), and where not that well positioned. Mah.

    One thing is for sure, Onkyo's digitals does not sound good nor with Energys nor with Tannoys (but the latter sounded better, although they were broken-in and bigger in dimensions).

  8. #8
    Crank it up, dude! huh? hydroman's Avatar
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    Me? Quick/dirty fix to assess if it is the speakers/room interaction - i would reverse the polarity (red/black) on ONE speaker.

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  9. #9
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    I have done that with the new speakers but in all sincerity I didn't sense much of a change. Will re-do when the NAD will arrive.
    Anyway room acoustics must be disastrous, but cannot do anything on it.

  10. #10
    AR Junior Member sgt bass08's Avatar
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    hi i get confussed with booming .what does booming mean were does it come from. i had a subwoofer in my bedroom and my bedroom is a square a perfect square .so i placed my subwoofer near the corner of the wall .it was 1 inch away from the side wall and 1inch away from the back wall.now in my subwoofer manual it says never place a subwoofer in a corner or keep it away by like 2-5 inches from walls and furniture etc.but anyway i carryed out and left my subwoofer in the corner.then i went to listen to music and the sound was awesome really made my walls shake everything was shaking the bass was strong .but then i whent back to the subwoofer manual .its says never place a subwoofer in a corner position it away from walls or place it in between the speakers so i placed my subwoofer away from the corner .put my music back on and the bass was clean didnt shake my walls but i didnt like it i perfer to have it in the corner it made or felt better as the bass seemed to be alive stronger lol.i also watched a tv programme called the gadget show and they said aswell never place a subwoofer in corner beacuse it will sound booming and unatural .they say place it in the middle of your room or behind the sofa never in a corner .
    i jsut thing my subwoofer worked better in a corner .i dont know about speakers becsuse they wouldnt give of the low frequencies. so it shouldnt really mater about booming on speakers or will it .because how can you get boom from speakers .
    I Perfer To Feel Bass On My Chest Then Not To Feel It At All

  11. #11
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    Quote Originally Posted by sgt bass08
    hi i get confussed with booming .what does booming mean were does it come from. i had a subwoofer in my bedroom and my bedroom is a square a perfect square .so i placed my subwoofer near the corner of the wall .it was 1 inch away from the side wall and 1inch away from the back wall.now in my subwoofer manual it says never place a subwoofer in a corner or keep it away by like 2-5 inches from walls and furniture etc.but anyway i carryed out and left my subwoofer in the corner.then i went to listen to music and the sound was awesome really made my walls shake everything was shaking the bass was strong .but then i whent back to the subwoofer manual .its says never place a subwoofer in a corner position it away from walls or place it in between the speakers so i placed my subwoofer away from the corner .put my music back on and the bass was clean didnt shake my walls but i didnt like it i perfer to have it in the corner it made or felt better as the bass seemed to be alive stronger lol.i also watched a tv programme called the gadget show and they said aswell never place a subwoofer in corner beacuse it will sound booming and unatural .they say place it in the middle of your room or behind the sofa never in a corner .
    i jsut thing my subwoofer worked better in a corner .i dont know about speakers becsuse they wouldnt give of the low frequencies. so it shouldnt really mater about booming on speakers or will it .because how can you get boom from speakers .

    'booming' means that the bass is slobby, undefined, muddy. Instead of a deep real bass, you get (albeit louder) muddy 'booming' sound. Generally this occurs in the higher regions (60hz and up), which is also the frequency where things start to shake.

    placing a subwoofer in a corner is possible, but I recommend you to equalize the output then (or if your subwoofer has an equalizer switch on the back, you could try to play with that.)
    I also found setting the phase wrong is generating some boomy sound, since the subwoofer seems to be slower then.
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  12. #12
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    It's not only muddy but it's even 'boxy', artificial. It's very unpleasant.

  13. #13
    AR Junior Member sgt bass08's Avatar
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    Quote Originally Posted by basite
    'booming' means that the bass is slobby, undefined, muddy. Instead of a deep real bass, you get (albeit louder) muddy 'booming' sound. Generally this occurs in the higher regions (60hz and up), which is also the frequency where things start to shake.

    placing a subwoofer in a corner is possible, but I recommend you to equalize the output then (or if your subwoofer has an equalizer switch on the back, you could try to play with that.)
    I also found setting the phase wrong is generating some boomy sound, since the subwoofer seems to be slower then.
    thats true there is a switch phase on the back off my subwoofer .but if i placed a floorstanding speaker in a corner. how would you get booming sound with speakers. i thought boomy sound can only come of really low frequencys like subwoofers.so if i place a bookshelf speaker in a corner would i get booming sound ??
    I Perfer To Feel Bass On My Chest Then Not To Feel It At All

  14. #14
    I took a headstart... basite's Avatar
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    Quote Originally Posted by Tetsuro
    It's not only muddy but it's even 'boxy', artificial. It's very unpleasant.

    could be a burn in period too, for a slight time.

    have you tried getting them a little further away from the back wall, even if you don't want to do this permanently, you should try it, just to see if that solves stuff. if it does, you should need a better port plug...

    try out a little, socks are being used too
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  15. #15
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    Plug-ins seems of good quality. Hope the amplifier will arrive tomorrow and will try different positioning as you suggest.

    Hope it's the burn-in period. Thanks.

  16. #16
    Class of the clown GMichael's Avatar
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    I would get a Radio shack db meter and a test CD to find out what frequencies are giving you the trouble. Then you'll have a better idea of what needs to be done.

    But be careful. Don't play this CD over 90 db. It can cause your ears &/or you speakers to be damaged.

    http://www.radioshack.com/product/in...entPage=search

    http://www.rivesaudio.com/software/softframes.html
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  17. #17
    AR Junior Member sgt bass08's Avatar
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    Quote Originally Posted by Tetsuro
    Plug-ins seems of good quality. Hope the amplifier will arrive tomorrow and will try different positioning as you suggest.

    Hope it's the burn-in period. Thanks.

    yes best thing to do try different positiong .but you shouldnt really get to much boom of them speakers .its mainly going to be of low bass frequencies.you could try to fill up your speakers to keep the bass stable .i dont know it might work .
    I Perfer To Feel Bass On My Chest Then Not To Feel It At All

  18. #18
    I took a headstart... basite's Avatar
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    Quote Originally Posted by sgt bass08
    thats true there is a switch phase on the back off my subwoofer .but if i placed a floorstanding speaker in a corner. how would you get booming sound with speakers. i thought boomy sound can only come of really low frequencys like subwoofers.so if i place a bookshelf speaker in a corner would i get booming sound ??

    you'd get more boomy sound than if you'd place them freely, with no walls really close to them.

    the phase switch on the back of your sub is not the only thing, the equalizer switch is more important if you wanna place it in corners.
    Life is music!

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  19. #19
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    Would be really ridicolous if it's the positioning. I mean... bass reflex ports are now completely closed (by the plugs supplied, and they are more dense than the Tannoys one). These are 'bookshelf' speakers, must stand on a 'bookshelf'... here there are 15 cm of space from the wall, more than the Tannoys (10...) and them never had a ->hint<- of 'booming'.
    It's like this 'booming' comes from the interiors, it's profoundly 'boxy' the sound. If it was just 'boom' I think I could have tolerated it.

    Anyway these plugs have worsened the sound, they seem to limit the speakers in the midrange too.

    Could have been the underpowered amplifier that was unable to control the mid-bass range with these inefficent speakers?
    Last edited by Tetsuro; 01-08-2008 at 10:18 AM.

  20. #20
    AR Junior Member sgt bass08's Avatar
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    Quote Originally Posted by basite
    you'd get more boomy sound than if you'd place them freely, with no walls really close to them.

    the phase switch on the back of your sub is not the only thing, the equalizer switch is more important if you wanna place it in corners.

    basite i noticed when placing the subwoofer in the corner it vibrated all my walls. i whent outside to have a listen and you could really hear the bass.but like i said i was watching a programme and they said dont place subwoofers in corners becasue you will get a booming sound and it will sound unnatural.but i kind of like the feeling of vibrations when placed in corners the bass was really strong .
    I Perfer To Feel Bass On My Chest Then Not To Feel It At All

  21. #21
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    Quote Originally Posted by sgt bass08
    basite i noticed when placing the subwoofer in the corner it vibrated all my walls. i whent outside to have a listen and you could really hear the bass.but like i said i was watching a programme and they said dont place subwoofers in corners becasue you will get a booming sound and it will sound unnatural.but i kind of like the feeling of vibrations when placed in corners the bass was really strong .
    I know what you mean... THOSE are not vibrations like what you mean. I hear techno music and 'that' booming does not disgust me like this. I need that Nad NOW.

  22. #22
    AR Junior Member sgt bass08's Avatar
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    Quote Originally Posted by Tetsuro
    Would be really ridicolous if it's the positioning. I mean... bass reflex ports are now completely closed (by the plugs supplied, and they are more dense than the Tannoys one). These are 'bookshelf' speakers, must stand on a 'bookshelf'... here there are 15 cm of space from the wall, more than the Tannoys (10...) and them never had a ->hint<- of 'booming'.
    It's like this 'booming' comes from the interiors, it's profoundly 'boxy' the sound. If it was just 'boom' I think I could have tolerated it.

    Anyway these plugs have worsened the sound, they seem to limit the speakers in the midrange too.

    Could have been the underpowered amplifier that was unable to control the mid-bass range with these inefficent speakers?
    its proply because them other speakers have more bass.that why you are getting a boomy sound. they also say or if you go to a music studio they fill there rooms with polyserine to keep the music from boomy or virbrating.
    I Perfer To Feel Bass On My Chest Then Not To Feel It At All

  23. #23
    AR Junior Member sgt bass08's Avatar
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    Quote Originally Posted by Tetsuro
    I know what you mean... THOSE are not vibrations like what you mean. I hear techno music and 'that' booming does not disgust me like this. I need that Nad NOW.

    just curious what music do you listen to
    I Perfer To Feel Bass On My Chest Then Not To Feel It At All

  24. #24
    AR Junior Member sgt bass08's Avatar
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    try this move your speakers .so they are facing you daigle. that should stop the sound waves from bouncing of the walls .
    I Perfer To Feel Bass On My Chest Then Not To Feel It At All

  25. #25
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    Quote Originally Posted by sgt bass08
    just curious what music do you listen to
    I listen to everything except rap or similar.

    Mostly New Wave, Rock, Pop (italian's and foreign), Classical, Electronic/Techno/Dance/Trance/a bit of house.

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