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Type: Posts; User: earthtodan

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    Driver matching for boom box

    I'm starting a new boombox project, modeled after my first successful one, the Kaboombox:
    ...
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    Usher 8945a 7" woofers

    SOLD

    Brand used Usher 8945p 7" woofers. Please note, I made a mistake in the title, these are not the 8945a, they're the 8945p, which is the same except they have a phase plug.

    I bought these...
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    Suppose you decide to build a soundproof...

    Suppose you decide to build a soundproof enclosure for your air compressor...
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    Free space is valuable stuff, I wouldn't try to...

    Free space is valuable stuff, I wouldn't try to fill it up just because. Wait for a need to arise.
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    If he changed the name to "science bus" or...

    If he changed the name to "science bus" or perhaps "engineering bus" I might take more of an interest. "Magic" sounds a little condescending.
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    Electric vehicles blur the line between on and...

    Electric vehicles blur the line between on and off. I don't know if anyone is putting a system in a Tesla Model S - or how that would affect the driving range - but if you're demoing with the car on,...
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    Agreed. Break off some pieces of solder, put them...

    Agreed. Break off some pieces of solder, put them in the crimp terminal with the wire, crush the terminal in a bench vise, finish with a torch. Maybe a soldering gun would work with a 4 AWG wire. A...
  8. It is gradual, but the transition point is...

    It is gradual, but the transition point is generally approximated as 1500 hz, so I'm assuming we can talk about 700 hz and below as ITD.
  9. I've done slow test tone sweeps with individual...

    I've done slow test tone sweeps with individual drivers in the doors, and sometimes frequencies in the bands you're using sound like they're coming from the opposite side of the car. As in, I could...
  10. I'm pretty sure that phase & time alignment are...

    I'm pretty sure that phase & time alignment are more important than level matching at any given band in the frequencies you're using in the doors, due to ITD vs IID and the precedence effect. What it...
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    Flying stereo physics

    The creator of XKCD started a new illustrated strip called What If, where he theorizes about extreme physics. Here's an entry about what a stereo would sound like traveling faster than the speed of...
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    Thanks. The lights actually do warm up the shelf...

    Thanks. The lights actually do warm up the shelf above them where they are attached. And of course, don't touch them after they've been on for about 10 seconds.
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    Garage speakers

    I know, I know, it's not car audio... but in a way, it is. This project uses Audible Physics NZ3 fullranges, and it's powered by a Zapco 7-channel amp, and processed by a miniDSP 2x8, all running off...
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    M-Audio Audiobuddy XLR preamp

    This is a 2-channel preamp that I've been using for computer-based RTA measurements and the occasional sound clip. Comes with 9VAC power supply and a 1/4" jack adapter for the output. Phantom power...
  15. Thread: Beaming

    by earthtodan
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    It happens because when the half wavelength...

    It happens because when the half wavelength becomes shorter then the cone width, the wave peak will pass over the opposite side of the cone as it's producing the opposite peak. So really beaming is a...
  16. Thread: Forum Setup

    by earthtodan
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    Sticky: I liiike it [/borat]

    I liiike it [/borat]
  17. Thread: Forum Setup

    by earthtodan
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    Sticky: How about making the blue icon for forums with...

    How about making the blue icon for forums with new posts a little darker? It can be hard to identify when reading on my smartphone in direct sunlight, like when walking around the building at work...
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    Thanks. The scary thing is, when I look at some...

    Thanks. The scary thing is, when I look at some of the newer cars and how integrated the stereos are, my car seems easy to work on by comparison. :wtf:

    The APs are working well with the Scans, and...
  19. It doesn't have the features of a proper DSP, but...

    It doesn't have the features of a proper DSP, but maybe you can download that as an application?
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    I considered that, but then decided against using...

    I considered that, but then decided against using them at all.
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    Do you have a bench vise? That will clamp harder...

    Do you have a bench vise? That will clamp harder than any hand tool.
  22. Thanks Erin, I have all the equipment, including...

    Thanks Erin, I have all the equipment, including an M-Audio preamp, and I've played around with REW but I've never really taken the time to learn by doing. Looks like it's time to get back to using...
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    As if right on cue:...

    As if right on cue: http://www.mobilesoundscience.com/f5/rta-walkthrough-use-thread-video-1237/
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    For the moment, we don't have enough content to...

    For the moment, we don't have enough content to separate everything out too much. We do have some innovative categories in the on-topic section, and those are what drew me to the forum in the first...
  25. Which one do you have? I think they changed their...

    Which one do you have? I think they changed their base pattern with the most recent part # system, because the Jasper jigs fit some and not others.

    No decent routers on CL right now for much less...
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