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How to reduce extra Bass?

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  #1  
Old 27th September 2008, 09:17 AM
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Question How to reduce extra Bass?


Hi,

I own Tannoy F1 custom spk.
If I put them in open space they sound Best.
But bcos no choice, I have to keep them on shelf where they sound
boomy.

So what are the Tipps to reduce that extra Bass?
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  #2  
Old 27th September 2008, 11:57 AM
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Re: How to reduce extra Bass?

If it is a ported speaker, check with the manufacturer if you can close them with a port bung/plug. How far away are they from a wall behind them? If they are in a completely enclosed space (except for front) then there is not too much to be done.
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Old 27th September 2008, 12:40 PM
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Re: How to reduce extra Bass?

Hi,

I agree with particleman's advice ! please do check according to what he has said !!

What I would like to add here is,If you have tried all other options and have found little success (after trying the above suggestions aswell) ! One trick might just work for you,that is the DIY mod trick !

What you can do is,add some extra damping material to already existing !! you can use polyfill or glasswool based on your choice and availability !! This for sure will eat the additional bass and make it more sober or tight !! This has to be done inside the speakers ! so one you should be ready for removing the drivers and such ! second there's shouldn't be any warrenty issues from dealer !!! so please check for this before proceeding with this method !!

Let me know if you require more info or any additional suggestions regarding this !!

Regards.
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Old 27th September 2008, 01:55 PM
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Re: How to reduce extra Bass?

Just to get a rough idea- Try placing a pillow near and around the port. I think it should help get rid of of the boomy base. If it works then perhaps you could get something made especially for the same.

Also, home made base traps can be made.

Sumit
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Old 27th September 2008, 02:13 PM
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Re: How to reduce extra Bass?

Quote:
Originally Posted by soundsgreat View Post
Hi,

I agree with particleman's advice ! please do check according to what he has said !!

What I would like to add here is,If you have tried all other options and have found little success (after trying the above suggestions aswell) ! One trick might just work for you,that is the DIY mod trick !

What you can do is,add some extra damping material to already existing !! you can use polyfill or glasswool based on your choice and availability !! This for sure will eat the additional bass and make it more sober or tight !! This has to be done inside the speakers ! so one you should be ready for removing the drivers and such ! second there's shouldn't be any warrenty issues from dealer !!! so please check for this before proceeding with this method !!

Let me know if you require more info or any additional suggestions regarding this !!

Regards.
Thanks to you all.

I may not open spk but try to add damping through bass port.
Spks are placed on shelf with hardly any space,so pillow want do.

But thanks for opinions.
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Old 27th September 2008, 05:48 PM
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Re: How to reduce extra Bass?

Hey! Spiro the boom is due to external reflections so pl do not try to damp the spk from inside.You might end up damging the spk,so also pl do not insert any thing through the port.
You must ve been supplied a cylindrical sponge to cover the port. Try & do that first. If it still does'nt improve you'll have to try damping the surrounding of the spk as placed.
All the best.
Cheers
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Old 27th September 2008, 08:21 PM
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Re: How to reduce extra Bass?

Hi,

With all due respect Neo !! what do you mean by damaging speakers by damping ???

Its pretty much clear and evident from Spiro's post that it is due to the room conditions and limited placement options !! also he has very very clearly mentioned that he cannot do much bout it !! hence various solutions are being offered and one happens to be mine !!

If you read clearly I've made it very clear that try all methods and then resort to internal damping !! but even otherwise I being DIY guy myself have done tonnes and tonnes of such mods to various speakers and till date have only managed to improve the sound rather then damage any speakers !! Not to mention have designed and built number of Speakers over the years !! So I know what Am talking bout !!!

I mean forgive me if I sound rude ! but its ridiculous to even think that extra damping will damage the speakers ! if you say it might cause some issues with the sound reproduction or may reduce overall sound quality I may have agreed to certain extent !! but DAMAGE ???? give me a break !!

On the other hand I agree with you on the other thing you have said !! Spiro do not try to stuff anything from the port !! it is not atall recommend !! at the most what you can do is just buy some round shaped sponge and just insert into the port (only till the end of it,not more)and see how that works ?? if that does the trick then fine !! else try to dampen the speakers from inside I guarantee it will cut the bass !! if you have any doubt as how to go bout it,just ask I'll explain !!

Regards.
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Old 27th September 2008, 08:59 PM
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Re: How to reduce extra Bass?

the best option is to move it out further from the walls on to speaker stands . As has been mentioned by others above the walls are what gives a bass boost.

could you give an idea of what your room is like and where the speakers are placed ? as any of the walls or the ceiling can contribute to a bass hump



Is this your speaker ? being front ported you definitely can place it near the back walls..

opening the speakers may not damage it but might lose you warranty and definitely spoil chances of a second sale..so even if you have the guts to do it keep is as the last option.
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Old 27th September 2008, 09:58 PM
 
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Re: How to reduce extra Bass?

Hi,

Opening the speakers, should be your last option.Though extra damping material should not damage the speakers, while taming the bass boom it could alter the sound at other frequencies.This may not always be for the better .

You mention that you place the speakers on a shelf.Try placing the speakers on cones or spikes to isolate it from the shelf. Placing some heavy object on top of the speakers(if the shelf can take the weight) may also help

If you cannot get hold of foam plugs just stuff the ports with socks and see if it helps and then get yourself some foam plugs.

Another trick is to take few packs of drinking straws and fill up the port with them so they sit tight ! Many small tubes in one big. This will give a slight air-flow resistance in the vented area.You can change the tuning by adjusting the depth of the straws .

Regards
Rajiv
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Old 28th September 2008, 04:45 AM
 
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Re: How to reduce extra Bass?

well ..
if you dont want to do anything with speaker ...
one solution may be to add Rc-passive bass reduction circuit...[just 2 or 5 passive components]
this will slightly cut bass from source so finally u can enjoy a clean music... it should be placed as follows

CDP Analogue out >Passive bass reducer>Amp>Speakers

let me know if u choose this technique !!!!

kaushik


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