Need advice with bass traps for my living room - AVS Forum
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post #1 of 9 Old 02-22-2013, 08:47 AM - Thread Starter
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Hi smile.gif

I did the mirror technique to locate the first reflections and where to put bass traps, unfortunately as you can see in the picture the reflections points aren´t really good for my living room.
The picture with the windows I´ve have now gotten some curtains, I´m thinking of maybe its a good idea to put a bass trap behind the curtains and have it free in the air hanging from the pole, and perhaps the sofa will help with absorbing some of the second reflections?

The places where the reflections hit on the other picture is not very good either.

Perhaps if I move the speakers more back I can do some adjustment where they hit,
do you have any advice?

Also how wide and long should the traps be for my speakers? (107 cm tall, 30 cm long)

/Karl


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post #2 of 9 Old 02-22-2013, 08:54 AM
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Quote:
Originally Posted by Challe77 View Post

do you have any advice?
The main issue I see is the wood floors. The next problem would be the distance from the speaker baffles to the rear wall, causing a serious midbass null.
http://www.padrick.net/LiveSound/CancellationMode.htm

Beyond that, read this:
http://www.realtraps.com/articles.htm

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post #3 of 9 Old 02-22-2013, 09:47 AM - Thread Starter
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Hi, A big carpet will be in place soon so that will improve the sound. What do you mean by the distance to the wall, too far from the wall?, I thought you should avoid placing the speakers too close to the walls?, or do you mean the back wall?
Can the problem you mention be fixed bt moving the speakers?

/ Karl
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post #4 of 9 Old 02-22-2013, 10:08 AM
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You may need to word your question differently, bass traps are used in corners ie... floor/ceiling and wall corners. Diffuser/absorbers are for reflection points, check out Bills links
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post #5 of 9 Old 02-22-2013, 10:17 AM
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Before you spend money on panels, are you sure you really need them?
I recently got some absortive panels to put it on the rear wall, similar to yours where the sofa is close to the wall. The effect of the panels made the soundstage more focus and the overall sound less ambience. Personally i did not like it too much.
Thats just my personal experience. You may want to experiment.
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post #6 of 9 Old 02-22-2013, 10:59 AM
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Quote:
Originally Posted by Challe77 View Post

What do you mean by the distance to the wall, too far from the wall?, I thought you should avoid placing the speakers too close to the walls?, or do you mean the back wall?
Can the problem you mention be fixed bt moving the speakers?

/ Karl
Read the link. There will be a cancellation mode where the speaker baffle is 1/4 wavelength away from the wall behind it. That distance should be kept as short as possible, unless the speaker isn't operating in the bandwidth where the baffle is 1/4 wavelength from the rear wall. The exception would be if your room has a standing wave issue that can be countered with an intentional null. But you'd need measurement gear to know that.

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post #7 of 9 Old 02-22-2013, 01:05 PM - Thread Starter
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I´ve tried reading that chart but I´m afraid I really can´t understand it. I don´t know if my pictures is misleading but the front speakers are at least 7 inches from the front wall, any closer and it can result in a boomy bass sound. Just tell me please what position I need to move the speakers to.

/Karl
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post #8 of 9 Old 02-22-2013, 01:49 PM
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Originally Posted by Challe77 View Post

the front speakers are at least 7 inches from the front wall, any closer and it can result in a boomy bass
Says who? It's possible, but you won't know if you don't try it. I can't tell you where to put them because I'm not in your room to hear or measure them, and you don't have an in-room measured response chart to post. It's trial and error for now.

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post #9 of 9 Old 02-23-2013, 04:22 AM - Thread Starter
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Hi, ok thanks, I will do the trial and error method. I have pointed the speakers more inward, and the center channel more upward and I already sounded great when I zapped through the channels on the tv listened to some music. I will buy a big carpet today, so that will probably help improve things too smile.gif
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