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Jlan Thr Smth

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Posts posted by Jlan Thr Smth

  3. Saving tracks from audicity

    in Tunez - All things music related

    Posted

    i export it but it comes out as a file and it wont go into my ipod??

    moot point if he doesn't have the lame library

    I had the same issue of it just saving as a "file" with no extension at the end, If he does not add the extension at the end, it will not open up or be recognized as an MP3. I just exported without the file extension and this is what you are left with,

    rac.png .

    do you have the lame mp3 encoder library?

    I DO NOT have to add mp3 to get them to save correctly

    Honestly, Do not recall. Probably, probably not.

  4. Sealed Box Stuffing?

    in Subwoofers / Enclosures

    Posted

    Would you fill the box completely up or what..? I'm confused... :trippy:

    You typically fill the box with 1 lb per cubic foot of internal air, so if you have a 2 cube box you would fill it up with 2 lbs of polyfill.

    I don't recall how much till it reaches the point of diminishing returns, but you get the general idea.

  5. Saving tracks from audicity

    in Tunez - All things music related

    Posted · Edited by Jlan Thr Smth

    i export it but it comes out as a file and it wont go into my ipod??

    moot point if he doesn't have the lame library

    I had the same issue of it just saving as a "file" with no extension at the end, If he does not add the extension at the end, it will not open up or be recognized as an MP3. I just exported without the file extension and this is what you are left with,

    rac.png .

  7. Sealed Box Stuffing?

    in Subwoofers / Enclosures

    Posted · Edited by Jlan Thr Smth

    Upon futher research I stumbed upon the Audio Engineer's Reference book,

    It also becomes necessary to introduce large amounts of absorbent material to damp dimensional resonances or standing waves, and to reinforce or brace the panels to reduce vibration. Fortunately, filling the enclosure with glass fibre or similar light absorbent material has the effect of partially changing the air operation from adiabatic to isothermal, which reduces the velocity of sound and may increase the effective volume of the box.

  9. Sealed Box Stuffing?

    in Subwoofers / Enclosures

    Posted

    Wow.....

    Ok yeah, the poly fill would have an extremely small effect on tempterture differential but is NOT what's causing the desired effect.

    What's causing the desired effect is a decrease in standing waves. The back waves from the cone are dispersed and slowed down, causing the driver to act as if it's in a slightly bigger box while maintaining the compression needed for cone control at high excursion.

    Not to call you out, but to get standing waves especially at such low frequencies wouldn't the volume of the car have to be huge? You really don't see standing waves in a car... more in home audio..

    From what I've read stuffing is based soley on the principle of accoustical energy being turned into thermal energy, albeit very small change.

  10. Sealed Box Stuffing?

    in Subwoofers / Enclosures

    Posted

    Very interesting. I read that it increases output up to 40%. I might give this a try. Where would I get the material. An also, is it subwoofer safe? I don't want to burn em up due to lack of ventilation haha

    I don't know about 40% but pillow stuffing or known more specifically as PolyFill can be purchased from walmart/craft stores for cheap. Yes the subwoofer is safe I wouldn't worry about anything burning up. I don't recall where it starts hitting diminishing returns.. I would start off at 1 lb/ft^3.. Someome could chime in probably. It will not increase the volume a whole lot but in some cases it can really help with the low end.. I would tell you to not get you hopes up too high as the change in sound may be minimal.

  11. Sealed Box Stuffing?

    in Subwoofers / Enclosures

    Posted · Edited by Jlan Thr Smth

    its maybe the easiest way to "increase" the volume. it actually alters the rate that the air inside the box changes temperature. lets use a sealed box as an example-

    when your cone is at rest, the pressure inside the box is considered ambient. when the cone goes in, the pressure inside the box goes up. when you pressurize air, the temperature goes up. when the cone goes out, the pressure inside goes down, and temperature goes down. we're not talking about a couple of degrees, its generally a very small temperature change.

    but once you add polyfill or fiberglass insulation, or something of that sort, it absorbs and radiates the heat at a different rate than just air. its a slower rate very similar to having more air, just like having a bigger box. it only works because there is so much surface area in proportion to mass, and finer materials tend to work better.

    But the problem is it reaches diminishing returns quickly and will only work up to a certain point. Last time I looked into stuffing it was about 1 lb/ft^3

  12. BAMF5500

    in Amplifiers

    Posted

    What a lot of people are failing to see is you don't have to give the sub "full power" for it to shine, the BTL is brutally loud even on low power.. Its an efficient woofer in terms of being able to get loud. My buddy Bo Carriaga at one time ran a whole bunch of the BAMF series, he was making almost 2k with them... and for the price that's not terrible. I too would look at some used amps or hifonics or AP or whatever. It really isn't going to matter unless your competing you will not hear a consistent audible difference between 1500w and 2000w. Because as some/most of you know that on paper you must double your power to gain 3 dB, which is the threshold of human hearing for an audible change.

  18. Team SSAudio Mustang, Single ZCON 18, PowerBass XTA-5000d

    in Member Videos - Host 'em & Post 'em! System Vids / Off Topic

    Posted · Edited by Jlan Thr Smth

    Sealed on the dash scores? You gonna seal off around the box?

    Full wall coming early next month My buddy Bo Carriaga is going to be doing/helping..

    If you don't know who he is.. Youtube him :P

    It was fairly low.. I think 1-3dbs lower like a 147 or so.

    and not to mention the numbers were BEFORE I got the Powerbass 5k.. the numbers were off Saz-3500 at 1 ohm.. so numbers are probably higher.

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