Bass traps or EQ - Page 3 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #21 of 79 Old 01-20-07, 09:40 PM Thread Starter
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Re: Bass traps or EQ

Quote:
basementjack wrote: View Post
Fred,

Have you seen the program CARA before? It's an acoustic modeling program.

You design up your room in 3d and it can calculate what the frequency response will be at the listening position. It also has a cool feature that shows where peaks and valleys will be in your room for a given frequency.

You could use something like this to experiment with different options before commiting to anything.

- Jack
No I have not heard of this program before but it does sound interesting.I am interested in learning more about it ,would you by chance have a link?
Thanks Fred
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post #22 of 79 Old 01-20-07, 11:32 PM
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Re: Bass traps or EQ

Cara can be found at www.cara.de (main site)
or www.rhintek.com (us distributor - I believe related to the author in some way.)

I would look at the website in the US, and if it looks interesting, give them a call.

I first found out about it via a forum suggestion, but wasn't sure.

After talking to the guy for 15 minutes, I was sold.

The product is pretty cheap for what it does, and how specialized it is.

It'll set you back about $75 for the current version with the tutorial CD - the Tutorials are top quality - and very helpful - acoustics is a fairly complex subject to begin with, and while the program isn't hard, the tutorials really help point out all that the program can do.

- Jack

- Jack
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post #23 of 79 Old 01-21-07, 06:23 PM Thread Starter
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Re: Bass traps or EQ

Thanks Jack I will check it out.
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post #24 of 79 Old 01-21-07, 08:43 PM Thread Starter
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Re: Bass traps or EQ

Here is the finished product.I plan to mount them on the upper half of the corner and may add a solid pine end cap on them to dress them up a bit.
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post #25 of 79 Old 01-21-07, 10:23 PM
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Re: Bass traps or EQ

Wow Fred, those look great, and it sounds like you threw them together pretty quickly.
I wish I would have done something like that - I suppose I still can.

I spent a pretty good amount of time and effort building some 'tube traps' - and while I'm sure they're doing something, they are pretty imposing - your traps blend right in.

What did you end up using for insulation?

- Jack
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post #26 of 79 Old 01-21-07, 10:27 PM
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Re: Bass traps or EQ

Nice work...
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post #27 of 79 Old 01-21-07, 10:59 PM Thread Starter
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Re: Bass traps or EQ

Thanks Jack and Sonnie.

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what did you end up using for insulation?
I used this 3" mineral wool. http://www.roxul.com/graphics/rx-na/...sh-5-16-06.pdf

I just cut it into wedges and stacked them until the frame was full.

I'm quite pleased with the look and was surprised how easy it was to do.Im not sure what the blue cover material I used is made of (I still had some left over from my wall panel project) but it is a pleasure to work with.It stretches nicely in all directions without bunching up.
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post #28 of 79 Old 01-22-07, 08:48 PM
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Re: Bass traps or EQ

I think you are on the right track. I've always heard that one should try to deal with problems using treatments first and EQ what that won't fix (peaks only!). In my case treating a nasty 63Hz dip had the side effect of solving a 95Hz dip and a big 50Hz peak.

Once you finish your corner traps (very nice BTW) I think you'll see improvements elsewhere as well.
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post #29 of 79 Old 01-23-07, 06:19 AM
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Re: Bass traps or EQ

Nice job on the corner absorbers. They look really good and I'm sure are performing well.

Just a little addition to the above post.

- Deal with what you can first via placement of seating, speakers and sub.
- Treat the room to deal with modal issues and to bring overall decay time into place using broadband treatments
- Use tuned absorbers if feasible to deal with narrow, more stubborn issues
- Use EQ to deal with the last few peaks in response.

Bryan

I am serious... and don't call me Shirley.

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Sensible Sound Solutions
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post #30 of 79 Old 01-24-07, 08:39 PM Thread Starter
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Re: Bass traps or EQ

Thanks Bryan and Boomie for your complimentry words and advice.

I have only finished two of the traps but I placed them in the lower front corners and did a bit of listening .Even with just the two there was a very noticable improvement in the bass range.I listened to among other things Pat Metheny and Charlie Hadens ,Beyond The Missouri Sky which is a very well recorded disc of mainly acoustic guitar and acoustic bass.

I find this recording a good bass articulation test and on my system the acoustic bass tended to sound a bit bloated and some notes were a little too resonant.With the traps installed these same bass notes tightened up considerably and became more detailed and natural sounding. Similar results were noted with other recordings.

I am pleasantly surprised by the degree of improvement and so far it looks like the $30 and 1.5 hours spent building these was well worth it.Now I have to build two more and see if that brings even greater rewards.
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