Re: My Superchunk Bass Trap Project, Graphs included
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Joined: Jan 2004
Posts: 13,840 Likes: 13
shareholder in the making
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OP
shareholder in the making
Joined: Jan 2004
Posts: 13,840 Likes: 13 |
I thought I would update the above drawing to give you all a better idea of what the room looks like. Keep in mind this is not to scale. Since I have completed my Superchunk Traps on the front wall, my next plans are to build some column traps to go in the rear corners. I would also like to put some bass traps where the walls/ceiling meet in the HT area above where I'm thinking about putting some 1st reflection treatments. Also, I eventually might put some 1st reflection on the ceiling locations. As you can see, there is a 10" bulk head dropped along the entire width of the room, I might be able to put some smaller bass traps up in the corner facing the screen? What do you all think? Also, I have a few questions for using 703 for 1st Reflection Treatments: 1) First of all, am I correct in saying I want to leave some space behind the 703 and the wall, within the frame I build? 2) Also, do I want to use the FRK(scrim) on the side facing the room, or use regular 703 with no facing? 3) For those wall/ceiling treatments do most people use 2" thick or double up and use 4" thick 703? Thanks in advance, Randy
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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Re: My Superchunk Bass Trap Project, Graphs included
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Joined: Aug 2004
Posts: 6,379 Likes: 7
axiomite
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axiomite
Joined: Aug 2004
Posts: 6,379 Likes: 7 |
Take all of the following with a LARGE grain of salt...
>>1) First of all, am I correct in saying I want to leave some space behind the 703 and the wall, within the frame I build?
The space helps with bass trapping but I don't think it helps so much with absorbing higher frequencies. There was a chart somewhere with cutoff frequencies vs. thickness of 703-style fiberglass, will see if I can find it.
>>2) Also, do I want to use the FRK(scrim) on the side facing the room, or use regular 703 with no facing?
If you're talking about paper facing, I think that helps with bass trapping but reflects a lot of higher frequencies. For treating first reflections I would say "no facing".
Note that you probably want a ton of absorbtion (sp) on the left wall to balance off the fact that you have no right wall.
>>3) For those wall/ceiling treatments do most people use 2" thick or double up and use 4" thick 703?
I'm pretty sure 2" is enough for higher frequencies -- the question is whether it's worth putting more FG in there and getting more absorbtion in the lower frequencies. I'm REALLY tempted to pick up that $150 ETF software package from Rives (also needs mic, cables and decent sound card) which indicates decay & resonances at all frequencies. That would shed a lot of light on what the room needed.
One common treatment for mixdown rooms seems to be what they call a "cloud" over the listening position, basically a big chunk of fluffy fiberglass near the ceiling with enough framing to look half-decent. Not sure if you have enough height to keep it out of the projector light cone though...
BTW I don't think bass traps at the bulkhead would be as effective as bass traps at the back wall/ceiling boundary.
M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39 M5HP, M40ti, Sierra-1 LFR1100 active, ADA1500-4 and -8
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Re: My Superchunk Bass Trap Project, Graphs included
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Joined: Jan 2004
Posts: 13,840 Likes: 13
shareholder in the making
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OP
shareholder in the making
Joined: Jan 2004
Posts: 13,840 Likes: 13 |
Well I just got back from getting some more OC 703 Rigid Fiberglass panels and some 1 x 4's. Hope to start building some FRZ's tomorrow, and eventually some more column bass traps for the rear corners. Gotta consider the Wife Factor.
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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Re: My Superchunk Bass Trap Project, Graphs included
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Joined: Jan 2004
Posts: 13,840 Likes: 13
shareholder in the making
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OP
shareholder in the making
Joined: Jan 2004
Posts: 13,840 Likes: 13 |
Just a quick update, I've got 3 of my FRZ (first reflection zone) panels built and installed in the correct locations on the side walls. I still need to hang 2-3 on the ceiling FRZ's as well, and then onto a few more bass traps for ceiling/wall corners and then rear column bass traps for the rear corners of the room. I can't believe how much better the music sounds, just with the front wall superchunks and FRZs up so far. In the mids/high categories the clarity has improved greatly. I am no longer hearing the same sounds that were reflected off walls and coloring the overall sound. Percussion, Strings, etc...just sound crystal clear. My 60's sound better than I ever thought possible. Ok, don't break out the tissues. I'll try to get some pictures up within the next week. I just wanted to let you know I'm amazed at what I'm hearing with my cd's.... talk to ya later.
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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Re: My Superchunk Bass Trap Project, Graphs included
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Joined: Dec 2005
Posts: 3,301
connoisseur
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connoisseur
Joined: Dec 2005
Posts: 3,301 |
Sounds good Randy, I can't image how good some M80's would sound in your setup
A computer once beat me at chess, but it was no match for me at kick boxing.
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Re: My Superchunk Bass Trap Project, Graphs included
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Joined: Jan 2004
Posts: 13,840 Likes: 13
shareholder in the making
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OP
shareholder in the making
Joined: Jan 2004
Posts: 13,840 Likes: 13 |
My 60's sound better now than 80's with no bass traps or FRZ treatments.
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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Re: My Superchunk Bass Trap Project, Graphs included
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Joined: Dec 2005
Posts: 212
local
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local
Joined: Dec 2005
Posts: 212 |
Great read, thank you for sharing this.
I might of missed it in this thread, but what is your ceiling and floor like? Have you done anything to help reflections/absorptions there?
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Re: My Superchunk Bass Trap Project, Graphs included
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Joined: Jan 2004
Posts: 13,840 Likes: 13
shareholder in the making
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OP
shareholder in the making
Joined: Jan 2004
Posts: 13,840 Likes: 13 |
My current project includes "first reflection" treatments on the side walls and ceiling locations. Then I can move on to finish a few more bass trap locations...
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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Re: My Superchunk Bass Trap Project, Graphs included
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Joined: Jul 2006
Posts: 2,102
connoisseur
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connoisseur
Joined: Jul 2006
Posts: 2,102 |
I am a bit worried about my theatre room. If I order M60's, i have a 16 foot long room. I don't think I'll be able to place the speakers 3 feet from the front wall (1/5 distance) because there is a door to the left of the screen and I don't want people running the risk of kicking the speaker or anything when they come into the door. Is there a minimum distance of placement from the front wall? Ideally 1 foot for me would be best.. I am kinda freaking out about all this acoustic stuff wondering If I screwed myself over when I designed the room before It was drywalled...
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Re: My Superchunk Bass Trap Project, Graphs included
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Joined: Jan 2004
Posts: 13,840 Likes: 13
shareholder in the making
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OP
shareholder in the making
Joined: Jan 2004
Posts: 13,840 Likes: 13 |
My M60's are about 7-8" from my front wall, most people have them closer, 3ft seems to far. I would not worry about the acoustic stuff to much, I didnt' add my treatments until after everything was done either.
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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