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radiorog's picture
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Damping boomy bass
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 Hi,

 I have recently encountered extra boom from my Dynaudio DM 2/7 speakers having just upgraded my amp. The speakers sit 26 cm from the walls, and one of them is in a corner with 26cm to the rear wall and 30cm to the side (this is the boomiest of the speakers). I have resorted to placing the foam bung in the port of the speaker in the corner. This does effect sound quality slightly tho. Bass drum and other drums have lost that kick of air for example, which is necessary to replicate their sound correctly.  Some people (from the forum) have kindly suggested things to do, such as using auralex foam pads for the speakers or granite slabs. I may well try these options but am thinking that my main area of boominess is from the air bouncing back off the walls.

 I have just showed my flat mate and he seems to have come up with an ingenious idea of using foam like they do in studios, around the actual walls where the speakers are. 

 Does anybody know if this will work?

 Thank you very much.

 

CA 651C , Rega brio-r , Dynaudio dm2/7 , Denon TU 260l , Google nexus 7 , Harman Kardon BTA10

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RE: Damping boomy bass

radiorog wrote:

 Hi,

 I have recently encountered extra boom from my Dynaudio DM 2/7 speakers having just upgraded my amp. The speakers sit 26 cm from the walls, and one of them is in a corner with 26cm to the rear wall and 30cm to the side (this is the boomiest of the speakers). I have resorted to placing the foam bung in the port of the speaker in the corner. This does effect sound quality slightly tho. Bass drum and other drums have lost that kick of air for example, which is necessary to replicate their sound correctly.  Some people (from the forum) have kindly suggested things to do, such as using auralex foam pads for the speakers or granite slabs. I may well try these options but am thinking that my main area of boominess is from the air bouncing back off the walls.

 I have just showed my flat mate and he seems to have come up with an ingenious idea of using foam like they do in studios, around the actual walls where the speakers are. 

 Does anybody know if this will work?

 Thank you very much.

 

It's worth trying. You can get a big sheet of 25mm thick acoustic foam on Amazon for around £15. Suck it and see.

I have speakers sitting in a bookcase. I lined the bookcase with acoustic foam and it's removed the boom pretty well.

Matt

This train … carries saints and sinners / This train … carries losers and winners / This train … carries whores and gamblers / This train … carries lost souls.

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RE: Damping boomy bass

 great, thanks Matt, worth a try then.

CA 651C , Rega brio-r , Dynaudio dm2/7 , Denon TU 260l , Google nexus 7 , Harman Kardon BTA10

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RE: Damping boomy bass

Trade them for some Dynaudio DM 2/6 from somebody who needs a bit more bass or just some bass traps (i think it's called) in the corners

Hifi: Denon DRA-F109 and boston A26 on isoacoustics hooked up to my Z97 i7 pc

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RE: Damping boomy bass

Having a speaker in or near a corner can make the bass boom. Before you resort to sticking things to walls, you might want to try:

1. Moving the speaker forward a little (away from the wall behind it)

2. Moving the speaker sideways (away from the side wall)

3. Toeing in your speakers. turn them a few degrees off parallel with the walls - try a few degrees at a time.

All of these can help, but will also change the way the speakers sound.

Also, having read one of your previous threads: Have you still got your speakers on furniture? This can make them boomier, by acting as a sounding board, even if you use blu tak or something to isolate them. Dedicated speaker stands, or even wall mounts might (read: will) help here.

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RE: Damping boomy bass

You can get high density rockwool from some DIY sheds which is probably cheaper, like this:  http://reviews.wickes.co.uk/9987-en_gb/161189/reviews.htm

Best is move the speaker away from the walls if you can.

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RE: Damping boomy bass

You can buy ready made corner bass traps that should help with your problem .

There are many designs to choose from but here are a couple to look at .

 

http://www.ebay.co.uk/itm/2-Professional-Acoustic-Foam-3-ft-11-in-1200mm-Bass-Traps-Sound-Treatment-/290905308150?pt=UK_Sound_Vision_Other&hash=item43bb4ebbf6

or these,

http://www.ebay.co.uk/itm/Acoustic-Sound-Treatment-3ft-High-Bass-Trap-Studio-Foam-/110295200133?pt=UK_MusicalInstruments_Other_Pro_Audio_Equipment&hash=item19ae1b3185

 

 Electrocompaniet EMC 1 UP , Monarchy Audio DIP, Electrocompaniet ECD 1 dac , EC4.8 preamp , 2x AW180 monoblock power amps , PMC PB1i speakers . Thousands of Cd's .

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RE: Damping boomy bass

Before you spend any money how about blu-tacking some egg boxes to the wall behind the speaker..? Smile

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RE: Damping boomy bass

scene wrote:

Having a speaker in or near a corner can make the bass boom. Before you resort to sticking things to walls, you might want to try:

1. Moving the speaker forward a little (away from the wall behind it)

2. Moving the speaker sideways (away from the side wall)

3. Toeing in your speakers. turn them a few degrees off parallel with the walls - try a few degrees at a time.

All of these can help, but will also change the way the speakers sound.

Also, having read one of your previous threads: Have you still got your speakers on furniture? This can make them boomier, by acting as a sounding board, even if you use blu tak or something to isolate them. Dedicated speaker stands, or even wall mounts might (read: will) help here.

I've said to the OP in other thread that he should consider stands for the speakers, speakers on top of furniture is not disireble, as bass frequencies are passed to the box below, and amplified. As the sound of the Dyns will change on top of dedicaded stands! 

When I bought my X12 i've had to wait for one week to the stands to arrive, and I've to put them on top of my Monitor Audio B4 and even with Atacama Isolation Gel pads i could ear the box of the MA B4 singing! 

Speakers on stands will atenuate the problem, but will not end with it. 

My speakers are away from rear wall 60 cm, measurements were taken from the wall to the front of the speaker.

 

 

Rega RP6/Goldring Elite>Clearaudio Basic Plus

Synology NAS>Rega DAC>Pathos Classic One MKIII>Dynaudio Excite X12

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RE: Damping boomy bass

Check my sig links and others re bass traps. Well worth it

Yamaha V2065. MS Mezzo 5.1 Panasonic 42. Sony BD. Garrard 86SB. WD Live TV. SkyHD.

http://www.whathifi.com/forum/home-cinema/lounge-hc-signature-update-bass-traps

 

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RE: Damping boomy bass

IMO. You need to sort one problem at a time until your bass boom is satisfactorily mitigated.

The fact that your speakers are sitting on furniture, means that they (the furniture) will act like echo chambers accentuating the bass......so you need to sort this first (by de-coupling).

Once you have taken them out of the equation, you will then know to what extent the room is adding to the problem......it takes a methodical approach through elimination.

"We should no more let numbers define audio quality than we should let chemical analysis be the arbiter of fine wines."  Nelson Pass

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RE: Damping boomy bass

Then you can play with eggboxes and blu-tac :grin:

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RE: Damping boomy bass

Well if have not got them on stands thats the first thing to do.

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RE: Damping boomy bass

BigH wrote:

Well if have not got them on stands thats the first thing to do.

One speaker is on a chest of drawers, and the other is on a wardrobe.

"We should no more let numbers define audio quality than we should let chemical analysis be the arbiter of fine wines."  Nelson Pass

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RE: Damping boomy bass RE: Damping boomy bass

CnoEvil wrote:

IMO. You need to sort one problem at a time until your bass boom is satisfactorily mitigated.

I agree - last night I moved my speakers in so that they are 95cm from side and back walls.

Wow - what a difference, although wife not happy. Maybe I won't mention accoustic panels - might not need them now.  Smile

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RE: Damping boomy bass

I bought two pairs of these:

http://www.amazon.co.uk/gp/product/B006LFYOTQ/ref=oh_details_o04_s00_i00?ie=UTF8&psc=1

 

Made a very noticable difference, well worth the money IME.

Michell Gyrodec SE / RB300 / 2M Blue | Sony DVP-S9000ES | Bryston B60 | Rega R9

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