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#323115 - 09/17/10 09:57 PM M3 port
CatBrat Offline
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Registered: 08/05/09
Posts: 6015
Loc: Milky Way Galaxy
My son has a pair of M3's sitting on the TV stand that is a foot or more from the wall. My question is, can he make, say, an L shaped bracket that's as wide as the speaker and as tall as the speaker where it sits on the bracket giving about 1 inch of clearance behind the port. Will this increase the bass?

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#323120 - 09/17/10 10:24 PM Re: M3 port [Re: CatBrat]
JohnK Offline
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Registered: 05/11/02
Posts: 10621
Sure, Brian, at least a little, if you mean that the bracket will be directly on the wall, but first experiment. Use a stack of magazines or whatever and position the M3s an inch or so from the wall to sample the effect.

Edit: but if you mean what Randy suggested, then no. It's the relation to the wall itself which is significant. Just putting some object close to the port would have a negative effect, if any. Again though, experimentation is possible: stick a big heavy book or similar about an inch behind the port.


Edited by JohnK (09/17/10 11:00 PM)
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#323122 - 09/17/10 10:41 PM Re: M3 port [Re: CatBrat]
fredk Offline
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Registered: 12/06/07
Posts: 7786
Loc: Canada
The rule of thumb for subs is one port diameter away from the wall to avoid port compression.
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#323123 - 09/17/10 10:44 PM Re: M3 port [Re: JohnK]
SirQuack Offline
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I think what he is saying John is to leave the speakers on the TV stand, but create a wide bracket behind them to simulate them being close to a wall.

I'm sure you might notice some improvement, but the wall is a lot larger overall and has more reinforcement. I don't know how thick, or what material your thinking about, but not sure it would have the same gains as an actual wall.
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#323134 - 09/18/10 12:32 AM Re: M3 port [Re: SirQuack]
fredk Offline
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Registered: 12/06/07
Posts: 7786
Loc: Canada
If that is what is intended, then it will have to be a VERY large bracket to deflect the longer wavelengths of bass frequencies. Bass sound waves will travel around a smaller object. Essentially you are deflecting a pressure wave.
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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!

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#323143 - 09/18/10 08:11 AM Re: M3 port [Re: fredk]
CatBrat Offline
axiomite

Registered: 08/05/09
Posts: 6015
Loc: Milky Way Galaxy
He wants to leave them on the TV stand. There used to be a bookshelf behind the TV, I don't know if it's still there or not, I forgot to ask. When I asked him about them I discovered that he turns the bass up on the receiver. Then I remembered the ports, that they are just firing into thin air.

So, theoretically then I guess putting a plate behind the speaker, probably made out of 3/4 inch plywood, would not work then. It would have to be not much bigger than the speaker itself or it would take up too much space.

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#323144 - 09/18/10 08:15 AM Re: M3 port [Re: CatBrat]
MarkSJohnson Offline
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Registered: 09/27/04
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If he's turning up the bass, he needs a sub. It is, after all, just a bookshelf speaker.
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#323145 - 09/18/10 08:23 AM Re: M3 port [Re: MarkSJohnson]
SirQuack Offline
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Registered: 01/29/04
Posts: 13567
Loc: Iowa
The m3's should put out some good bass for 2 channel, but as Mark mentioned, a sub will help fill in the lower freq better.
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#323146 - 09/18/10 08:32 AM Re: M3 port [Re: SirQuack]
CatBrat Offline
axiomite

Registered: 08/05/09
Posts: 6015
Loc: Milky Way Galaxy
I was trying to figure what to get him for Christmas this time, I was thinking a pair of QS8's, but maybe a sub would be better. It can't be Axiom, because I'm not going to be able to afford an EP350 for this and I wouldn't want to go smaller after my experience with the EP175. I know there are a lot of other ones to look at, I just need to keep the cost under $500.

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#323147 - 09/18/10 09:23 AM Re: M3 port [Re: CatBrat]
Wid Offline
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Registered: 06/22/03
Posts: 6789
Loc: The Peoples Republic of Il.

There's the eD A2 300 along with the Hsu STF-2 and the Outlaw sub.
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