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Old 7th November 2009   #1
jhill
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Join Date: Aug 2009
Location: Denver, Colorado
Posts: 11

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Bass issues (particularly amps) in home studio. Help!?

Hello all you slutty people. First-time participant, long-time voyeur. Thank you for all of your expertise/experience/criticisms/ideas/bad engineering jokes/etc...

So here's the deal. My band practices at a friends home studio. He has two small children and his wife is starting to get annoyed with non-sleeping/crying children. As is usually the issue, the bass amp is the main culprit.

He put a good deal of thought into his live room. If i had to guess I would say it is 25' x18'x8'. The walls and ceiling are two 1" QuietRock with an air gap..couldn't tell you more details at this point. Each doorway has two doors with mass loaded vinyl. I would guess that about 40% is covered with auralex foam, and the floor is carpet. It does sound pretty good, though it is dryer than I prefer...

I have started to notice some bass issues recently. There is definitely a peak area about mid room, which happens to be where I, the drummer, is set up. I'm thinking if i'm in a peak spot, then our bass player is probably in a null area. As I think this is part of the problem, I suspect that there is other issues at play, such as a complete lack of bass trapping.

I've done a bit of DIY (2" & 4" rockwool panels, QRD diffusers), and he wants me to help keep the peace in his house. I would like to keep the cost down as much as possible, so i'm doing some brainstorming. These are the ideas I have so far.

1. Corner wedge absorbers. They would use 2'x4' 2" (rockwool maybe?) on the front. I'm thinking either 4 or 6" deep. I would be doing 2 or 4 of these.
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I would likely build the cabinet out of plywood, completely sealed. What I like about this idea is that it would be space efficient, and they could double as small tables in the corners. Also to preserve higher frequencies, I could place 1/8" or 1/16" birch plywood on the front. It could be stained which would look really nice, but i have no idea where that would stop reflecting and start absorbing...

2. 2'x4' panels, either 4 or 6" deep. These would be mounted across the corners. This would be the easier build. Once again I would build 2 or 4 of these.

The main goal of this is to reduce bass from amps (apparently the kick isn't too much as far as I know). If I did the corner wedge traps, would placing amps right in front of them help? From my limited knowledge of acoustics, i'm thinking that placing the amps in front of these traps would eat up the bass radiating backwards. This would reduce corner build up, and lower the risk of phase issues from those waves traveling back out and messing with the perceived levels out front of the amps. Just a theory and I could be totally missing the point...

If anyone has input I would really appreciate it. Thanks! Have a good one!
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