How I built my bass traps... - Page 5

Cojo · 6th January 2007, 11:29 PM

Hi again, I've started to make some new traps.

Since I made the first traps I have learned a few things so you can say that these new traps are version 2 of the original design.

The difference is the framing wood that now have holes cut through them so the effectiveness of the traps will become much better. This, obviously, have made them much lighter but it has also involved much more work.

On these pictures I took today you can see the sides getting done.

Cojo · 6th January 2007, 11:32 PM

Here are the ready cut framing for two traps.

4stringerfinger · 6th January 2007, 11:51 PM

Awesome, can't wait to finally work on my DIY acoustic treatment project. Thanks for the update.

Scott R. Foster · 7th January 2007, 12:50 AM

Nice... I'm going to go build a drink in your honor.

pan60 · 7th January 2007, 02:33 AM

Quote:

Originally Posted by Scott R. Foster

Nice... I'm going to go build a drink in your honor.

me two

bpape · 7th January 2007, 02:57 PM

Nice work. Most people don't take the time to do nicely shaped cutouts like that.

That's enough surface area to make a significant difference in the amount of absorbant exposed.

Sorry, I'm late to the party and it's too early to have a drink or two - well, maybe a little Kahlua in the coffee....

Bryan

Cojo · 7th January 2007, 08:02 PM

The drinks are on me!

Here's todays progress... The frames have been assembled, and they have been stained.

tubedude · 7th January 2007, 09:02 PM

THat might be a little harder than using a hole saw, but it looks good. I would stain the outside and cover the inside side of the hole with material to keep stuff in.

Cojo · 7th January 2007, 09:47 PM

Quote:

Originally Posted by tubedude

I would stain the outside and cover the inside side of the hole with material to keep stuff in.

That's the plan!

Glenn Kuras · 8th January 2007, 01:09 PM

Quote:

Originally Posted by Cojo

That's the plan!

Great looking stuff there sir!!!

Keep the pictures coming.

Glenn

svart · 8th January 2007, 04:50 PM

I thought for proper absorbtion/dissipation the traps actually had to be sealed and airtight except for their fronts?

Glenn Kuras · 8th January 2007, 06:15 PM

You are thinking of sealed panel traps, which are tuned to a certain problem frequency. What he is building is a broad band bass trap which picks up more of the over all frequency range.

Glenn

Cojo · 10th January 2007, 09:49 PM

So... here are todays work!

The fabric is getting stapled and trimmed on the sides.

Cojo · 10th January 2007, 09:52 PM

Here's the finished frames before fitting the insulation.

Cojo · 10th January 2007, 09:56 PM

Picture of the front and the back of the trap filled with 6" of insulation.

Cojo · 10th January 2007, 10:01 PM

Me with a staple gun and a scissor attaching the frontcover.

Cojo · 10th January 2007, 10:03 PM

...and finally, two selfmade traps ready to be transported to me!

pan60 · 10th January 2007, 11:36 PM

to cool!!!

Scott R. Foster · 11th January 2007, 03:59 AM

The best bass traps in the world are home made [well the worst too - but that aint the case here].

xmostynx · 11th January 2007, 04:49 AM

does it really matter what kind of insulation you use?

i'm not that familiar with insulation..but what about wall insulation? thats REALLY thick would that work at all?

and should you wrap the insulation in some kind of plastic to seal it off? insulation fibers=unhealthy to breath in?

i'm getting ready to build m ine..just wondering!!

Cojo · 11th January 2007, 07:45 AM

Quote:

Originally Posted by pan60

to cool!!!

Quote:

Originally Posted by Scott R. Foster

The best bass traps in the world are home made [well the worst too - but that aint the case here].

You're flattering me!

I have to say that it was much more work too. Cutting those extra holes in the sides wasn't difficult but it took alot more time, I really like the looks of them. I'll hope it will be worth it in the end. On paper you can say that I've got three traps, instead of two, compared to if I have done them as the previous ones.

Cojo · 11th January 2007, 07:55 AM

Quote:

Originally Posted by xmostynx

does it really matter what kind of insulation you use?

i'm not that familiar with insulation..but what about wall insulation? thats REALLY thick would that work at all?

and should you wrap the insulation in some kind of plastic to seal it off? insulation fibers=unhealthy to breath in?

i'm getting ready to build m ine..just wondering!!

Hi, I'll try to answer.

It does matter which insulation you use. You want to use insulation with high density. If you use fibre glass the density would be from around 45kg/sqr meter to 90kg/sqr meter. If you use stone wool the density would be a little bit higher.

If you wrap it in plastic it would still work for low frequencies but all the high frequecies would reflect back to you. I will not say anything about the helth aspect as I'm no doctor.

Good luck to you!

bpape · 11th January 2007, 12:41 PM

For some reason, the last pic of the finished product isn't coming through.

Bryan

Cojo · 11th January 2007, 12:46 PM

Quote:

Originally Posted by bpape

For some reason, the last pic of the finished product isn't coming through.

Bryan

Strange... I can see it. Try to reload or check back later.

studio825 · 11th January 2007, 12:54 PM

love the trap design .....
i would be careful with the facing cloth that the weave is not too tight as this will have a reflective response i have heard this in action and its not pretty .....also the fire aspect safety first... im gonna be building some too :)

As long as you can breath through the material you will have no problems>

Glenn Kuras · 11th January 2007, 01:17 PM

Quote:

Originally Posted by Cojo

...and finally, two selfmade traps ready to be transported to me!

Scott R. Foster · 12th January 2007, 08:02 AM

Quote:

Originally Posted by xmostynx

does it really matter what kind of insulation you use?

i'm not that familiar with insulation..but what about wall insulation? thats REALLY thick would that work at all?

and should you wrap the insulation in some kind of plastic to seal it off? insulation fibers=unhealthy to breath in?

i'm getting ready to build m ine..just wondering!!

Yes standard wall insulation will work, but you have to get it pretty thick for standard pink fluffy insulation to work well low in the band. Its not really about density but a related physical property called gas flow resistance that has a linear relationship [of a given material the higher the density, the higher the GFR].

Going from 4" to 24" thick with a higher GFR material like 705 or dense flavors of rockwool gives little reward for all the extra expense. About 4" is the "sweet spot' for efficeincy with such materials.

Using only 4" of a lower GFR material like roll insulation will not work on LF - but 24" of it will perform superlatively all the way across the band.

Mineral wool is not a health risk - but it is a nasty irritant - any breathable fabric cover will do to keep you away from it and vice versa - use the poly film if you want to reject HF as described above.

macmod · 12th January 2007, 08:16 AM

very, very nice!

Are they still pretty 'firm' with the side holes?

Regards,
Macmod

Cojo · 12th January 2007, 09:57 AM

Quote:

Originally Posted by macmod

very, very nice!

Are they still pretty 'firm' with the side holes?

Regards,
Macmod

Yes they are actually!

I wish I did all he traps like this but It's too much work to redo them. Maby in another life or another time!?

6th January 2007, 11:29 PM	#121
Cojo Lives for gear Join Date: Dec 2005 Location: Gothenburg, Sweden! Posts: 1,465	Hi again, I've started to make some new traps. Since I made the first traps I have learned a few things so you can say that these new traps are version 2 of the original design. The difference is the framing wood that now have holes cut through them so the effectiveness of the traps will become much better. This, obviously, have made them much lighter but it has also involved much more work. On these pictures I took today you can see the sides getting done. Attached Thumbnails __________________ Conny Johansson [ www.asteroidkiller.com ]

6th January 2007, 11:32 PM	#122
Cojo Lives for gear Join Date: Dec 2005 Location: Gothenburg, Sweden! Posts: 1,465	Here are the ready cut framing for two traps. Attached Thumbnails __________________ Conny Johansson [ www.asteroidkiller.com ]

7th January 2007, 12:50 AM	#124
Scott R. Foster Gear maniac Join Date: Feb 2006 Location: Jax - FL Posts: 169	Nice... I'm going to go build a drink in your honor. __________________ Scott R. Foster http://forum.studiotips.com/ http://readyacoustics.com/

7th January 2007, 02:57 PM	#126
bpape Gear addict Join Date: Jul 2005 Location: St. Louis(Wildwood), MO Posts: 419	Nice work. Most people don't take the time to do nicely shaped cutouts like that. That's enough surface area to make a significant difference in the amount of absorbant exposed. Sorry, I'm late to the party and it's too early to have a drink or two - well, maybe a little Kahlua in the coffee.... Bryan __________________ I am serious, and don't call me Shirley Bryan Pape Lead Acoustical Designer GIK Acoustics

7th January 2007, 08:02 PM	#127
Cojo Lives for gear Join Date: Dec 2005 Location: Gothenburg, Sweden! Posts: 1,465	The drinks are on me! Here's todays progress... The frames have been assembled, and they have been stained. Attached Thumbnails __________________ Conny Johansson [ www.asteroidkiller.com ]

6th January 2007, 11:51 PM	#123
4stringerfinger Gear maniac Join Date: Nov 2006 Location: Space City, TX Posts: 240	Awesome, can't wait to finally work on my DIY acoustic treatment project. Thanks for the update.

7th January 2007, 09:02 PM	#128
tubedude Lives for gear Join Date: Nov 2002 Location: Ky. Posts: 626	THat might be a little harder than using a hole saw, but it looks good. I would stain the outside and cover the inside side of the hole with material to keep stuff in. __________________ You CAN polish a turd... if you freeze it first.

8th January 2007, 04:50 PM	#131
svart Gear maniac Join Date: Dec 2006 Location: Atlanta Posts: 258	I thought for proper absorbtion/dissipation the traps actually had to be sealed and airtight except for their fronts?

8th January 2007, 06:15 PM	#132
Glenn Kuras Lives for gear Join Date: Jul 2005 Location: Atlanta, GA Posts: 2,953	You are thinking of sealed panel traps, which are tuned to a certain problem frequency. What he is building is a broad band bass trap which picks up more of the over all frequency range. Glenn __________________ Glenn Kuras - GIK Acoustics www.GIKAcoustics.com GIK Is Now Offering Room Kits

10th January 2007, 09:49 PM	#133
Cojo Lives for gear Join Date: Dec 2005 Location: Gothenburg, Sweden! Posts: 1,465	So... here are todays work! The fabric is getting stapled and trimmed on the sides. Attached Thumbnails __________________ Conny Johansson [ www.asteroidkiller.com ]

10th January 2007, 09:52 PM	#134
Cojo Lives for gear Join Date: Dec 2005 Location: Gothenburg, Sweden! Posts: 1,465	Here's the finished frames before fitting the insulation. Attached Thumbnails __________________ Conny Johansson [ www.asteroidkiller.com ]

10th January 2007, 09:56 PM	#135
Cojo Lives for gear Join Date: Dec 2005 Location: Gothenburg, Sweden! Posts: 1,465	Picture of the front and the back of the trap filled with 6" of insulation. Attached Thumbnails __________________ Conny Johansson [ www.asteroidkiller.com ]

10th January 2007, 10:01 PM	#136
Cojo Lives for gear Join Date: Dec 2005 Location: Gothenburg, Sweden! Posts: 1,465	Me with a staple gun and a scissor attaching the frontcover. Attached Thumbnails __________________ Conny Johansson [ www.asteroidkiller.com ]

10th January 2007, 10:03 PM	#137
Cojo Lives for gear Join Date: Dec 2005 Location: Gothenburg, Sweden! Posts: 1,465	...and finally, two selfmade traps ready to be transported to me! Attached Thumbnails __________________ Conny Johansson [ www.asteroidkiller.com ]

10th January 2007, 11:36 PM	#138
pan60 500 series nutjob Join Date: Nov 2004 Location: 500 series Guru land ; ) Posts: 5,424	to cool!!! __________________ www.pan60.com it is easy to sound as though one was endowed with great intelligence, whilst speaking amongst a crowd of total morons quote: The Hammer is like sonic crack. I'm actually afraid to use it for tracking Brad McGowan quote: Watch it Goatee boy.... not_so_new quote: your secret identity is safe with me superman! Peter Montessi

11th January 2007, 03:59 AM	#139
Scott R. Foster Gear maniac Join Date: Feb 2006 Location: Jax - FL Posts: 169	The best bass traps in the world are home made [well the worst too - but that aint the case here]. __________________ Scott R. Foster http://forum.studiotips.com/ http://readyacoustics.com/

11th January 2007, 04:49 AM	#140
xmostynx Lives for gear Join Date: Jan 2006 Location: Pittsburgh, PA Posts: 1,508	does it really matter what kind of insulation you use? i'm not that familiar with insulation..but what about wall insulation? thats REALLY thick would that work at all? and should you wrap the insulation in some kind of plastic to seal it off? insulation fibers=unhealthy to breath in? i'm getting ready to build m ine..just wondering!! __________________ -Make no mistakes I am what you make me http://www.myspace.com/xmostynx

11th January 2007, 12:41 PM	#143
bpape Gear addict Join Date: Jul 2005 Location: St. Louis(Wildwood), MO Posts: 419	For some reason, the last pic of the finished product isn't coming through. Bryan __________________ I am serious, and don't call me Shirley Bryan Pape Lead Acoustical Designer GIK Acoustics

11th January 2007, 12:54 PM	#145
studio825 Gear maniac Join Date: Sep 2006 Location: Dahellaware Posts: 175	love the trap design ..... i would be careful with the facing cloth that the weave is not too tight as this will have a reflective response i have heard this in action and its not pretty .....also the fire aspect safety first... im gonna be building some too :) As long as you can breath through the material you will have no problems> __________________ I QUIT

12th January 2007, 08:16 AM	#148
macmod Gear maniac Join Date: Sep 2005 Location: Amsterdam Posts: 239	very, very nice! Are they still pretty 'firm' with the side holes? Regards, Macmod __________________ http://www.juliaP.com http://myspace.com/juliaPmusic