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  1. Subwoofer damping

    Sealed Subwoofer Build Projects
    Hi: I've read posts here (around 2010) that adding damping material can help a subwoofer cabinet appear larger internally by adding something like one pound of fill per one cubic foot being the measure. My cabinet, exclusive of bracing and driver is about 3.4^ feet. I am thinking about...
  2. Damping sheets (CFD) for loudspeaker panels

    DIY Audio
    :dontknow:Apologies if this has already been covered in other discussions. I did a search for related terms and couldn't find anything in the results - so here goes.:sweat: I am wondering if anyone has tried using any of the damping sheets (Dynamat, Megamat etc etc) on in their speaker projects...
  3. Noob Question about sound damping

    DIY Speakers
    What is the material that you could put inside of your speaker to dampen the resonances? I have seen some white cottony thing, but I don't know what material that is Please help
  4. Damping or bafflewall?

    Home Audio Acoustics
    Ok, I'm going to take my screen down and do some changes to my setup, and thought I might do some more acoustic work back there while i was at it. So, I've been considering a baffle wall. Seems like a great idea for the front stage, but it won't do much for the rest of the room, so to speak...
  5. Mid/bass driver damping and bracing

    DIY Speakers
    I am designing a slot port enclosure for a mid/bass driver with the assistance of Bassbox Pro. The response needs to be from ~60-5000 Hz. There will be no internal crossover. I have a couple of questions. Which is better at killing low frequency standing waves? Blackhole 5 or No Rez? Is...
  6. Cabinet Damping for Velodyne Minivee 10?

    Home Audio Subwoofers
    I posted this on the AVS forums with no reponses yet. Sorry for the extra-long post... -------------------------------------------------------------------------------- I bit the bullet and ordered the Minivee 10- it was refurbished so I saved some money. Although the Minivee 10 generally...
  7. Damping vibrations through ceiling

    Home Audio Acoustics
    My home theater room is in the basement, it's a 10x20 room with a drop ceiling. The other day I was doing some testing w/Avatar (yes, the loud scene where the mother tree falls) - and I had the volume up. I have subs that are calibrated (and EQd with BFDs). The floor above was vibrating - the...
  8. Question about damping

    DIY Subwoofers - General Discussion
    I'm ready to size my sub enclosure but have questions about damping material. Should I install the damping material on all internal surfaces or just the top? Is there any one type of material considered better than another? What thickness should I use? Is the volume occupied by the damping...
  9. Resonace and damping

    DIY Speakers
    Hello to all, I have a pair of original Athena F2's in good condition. They are big boxy speakers with resonating cabinets, I just removed the drivers and noticed the lack of bracing and cheap carpet pad lining the cab walls. I'm going to try and add some bracing and dampening foam. I was...
  10. Better Cabinet Damping Material

    DIY Speakers
    I've been doing dome research on cabinet dumping materials, but can't find any reasonable explanation on what makes one product better than another. For starters, what frequencies are we trying to dump? I calculated the frequency for one-quarter wavelength of the longest dimension of my current...
  11. Carpet padding for damping material?

    DIY Speakers
    Seems like just about everything under the sun has been stuffed into speaker enclosures for damping. Has anyone ever used, or heard of, carpet padding being used? I have new 5/8" carpet padding left over after my house was recarpeted. I've actually doubled it up and stapled it into my Nat P...
  12. Memory Foam (Egg crate style) damping

    DIY Speakers
    Any one know the merits of a 2" memory foam mattress topper in terms of damping qualities? Thanks, Kyle
  13. Damping or No Damping, That is the Question

    DIY Subwoofers - General Discussion
    I am putting together a 8 cuft ported box with a CSS SDX-15. I am trying to decide if there is a need for damping material. The box will be braced fairly well with braces no more than 15" apart. This should drive the panel resonances up more than double the operating range. Some say yes and...
  14. Damping floor/ceiling room node?

    Home Audio Acoustics
    Hi! What would be a good way to tame a floor/ceiling room node? Corner trapping has proved less effective than hoped. I have plans to use 3pcs 4" 2'x4' panels suspended from the ceiling with a small gap (1"). Would this be enough? The node is at 73Hz. Where would I place the panels? I am...
  15. Damping materials

    DIY Subwoofers - General Discussion
    Just been thinking about damping materials used inside a subwoofer cabinet. Collo's sonosub program tells me to add damping to the underside of the topcap to dampen the box resonance which was around 45hz. Now if we're taling room treatments, to make a bass absorber to work down to 45hz...
  16. High, Low Damping - which is better?

    REW Forum
    OK, here is the dilemma. I just measured my sub response with CM140 that Sonnie sent me (Major Thanks) and discovered that i also have huge 60Hz dip, like many people here. I don't have a BFD yet, wanted to see if i need it at all. My plate amp has selectable Bass Boost at 14,20,28Hz and...

    DIY Speakers
    Ever wondered how much damping to put in your newly constructed spkr.,or sub box.:scratch: Wonder no more.:jump: This information has been known by(some)big name spr. manufactures for the last 40 years.it works out to be 1 lb/10 cuft. The amount is not critical , Best not to use fibre glass as...