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Flex Your PCD Mettle:

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  • bwaslo
    replied
    Re: Flex Your PCD Mettle:

    Wow. Now there's an idea. Not a bad shape for a cabinet at all.

    This one is surprisingly similar to a box I just finished constructing, meant to include the toe-in angle:
    http://www.ikea.com/us/en/catalog/products/50049363

    I might've saved myself a lot of time had I known of these.

    Leave a comment:


  • MysteryCat
    replied
    Re: Flex Your PCD Mettle:

    Originally posted by donprice View Post
    I bet whatever differences there are between 17 & 18 inch baffle width is lost in the variability of the drivers and XO components. Go for it!
    Awesome :D Now I'm excited. Thanks again.

    Leave a comment:


  • donprice
    replied
    Re: Flex Your PCD Mettle:

    I bet whatever differences there are between 17 & 18 inch baffle width is lost in the variability of the drivers and XO components. Go for it!

    Keep in mind that PE trap cab isn't necessarily an optimal size for for any of the woofers Zilch put in it. But it was real easy to use and reuse. So a little bigger cabinet may not be a bad thing and probably has little effect at the XO frequency. In other words, don't worry too much about cutting up the box to make it smaller to match the PE trap cab.

    That looks like a great way to get a decent cab on the cheap. A real bargain if you drive by and pick one up.

    Leave a comment:


  • MysteryCat
    replied
    Ikea Akurum cabinets?

    Would one of these work for the standard econowave build:
    http://www.ikea.com/us/en/catalog/products/90049403
    They were mentioned in the PE cabs thread. I see one with 18" width, pretty close to the PE trap kit 17" width. Does the crossover design still have to be changed?
    Thanks!

    Leave a comment:


  • muzikal-jrne
    replied
    EconoWave 4x / JBL 228H

    [QUOTE=Zilch;1655955]




    Zilch, did you ever come up with a crossover design for the Econowave 4x with the JBL 228H woofer and Selenium D2500Ti as shown in the left speaker of this picture? I know JBL has a crossover schematic for the AC18/95 here:

    http://www.jblproservice.com/pdf/AE%.../AC1895-WH.pdf

    but that is with the JBL compression driver and such.

    This EconoWave combo appears to be a great design for a relatively compact reference level Home Theater/ Music speaker. (With the assistance of appropriate sub-woofage of course :D )

    Cheers, Joe

    Leave a comment:


  • stgdz
    replied
    Re: Flex Your PCD Mettle:

    Originally posted by Zilch View Post
    2010 EconoWave Retrospective:
    Like I said before you have been a real asset to the diy community.

    Leave a comment:


  • dantheman
    replied
    Re: Flex Your PCD Mettle:

    Oops, that wasn't the final. :o It eventually went to this:


    Dan

    Leave a comment:


  • dantheman
    replied
    Re: Bandaid or Better for Cone Breakup modes?

    Originally posted by JoMoCo View Post
    Don't know if you have ditched your Pro 12A's...read your comments / data back in August (post 643-50) on the Pro 12A's breakup modes...I have noticed that some euro's are using a non drying coating on their high end coaxial LF cones that assumptively has the potential to moderate some breakup issues...as always...YMMV
    Oh yea, I did quite a bit of work on this. I got this:


    To eventually look like this:


    Too bad it lowered the onset of break up.

    None the less, some manufacturer's graphs are BS. That said I saw yesterday where a Scan Speak FRer was independently measured and the manufacturer's graphs were nearly identical. Bravo to Scan Speak. Either all manufacturing is not created equal or all manufacturers are not equally honest. Maybe a bit of both going on.

    Who knows,

    Dan

    Leave a comment:


  • edlafontaine
    replied
    Re: Flex Your PCD Mettle:

    Bravo!

    Leave a comment:


  • Zilch
    replied
    Re: Flex Your PCD Mettle:

    2010 EconoWave Retrospective:

    Early this year, I brought EconoWave to Tech Talk because it belongs here, not only because it has been firmly founded in Parts Express parts purchases for nearly 3 years, but because Jeff Bagby's PCD crossover optimization software, also based and resident here, is available as the foundation of exploring custom designs using the platform. Put "EconoWave" in the PE search window, and stuff happens. While it may be only in minor blips, I'd guess this work is visible in PE's bottom line. Literally hundreds of systems have been built by DIYers around the world; I am justly pleased.

    Yes, EconoWave is a significant departure from the cone/dome loudspeaker design paradigm which previously dominated this forum, and I regret the impacts this has had here; some regulars have viewed this work as a threat, succeeding at one point it having "Flex It" closed down for a brief period. Please appreciate that it has not been my intent to whiz on the Tech Talk campfire; I offer EconoWave as an alternative, and in unique respect, a challenge, as there is plenty of territory for dome tweeter enthusiasts to explore mating them with waveguides, based upon the work of Zaphhttp://www.zaphaudio.com/Waveguidetmm.html and Elliott. [http://sound.westhost.com/articles/waveguides1.htm]

    Over the course of its 3-year history, EconoWave has grown into an internet phenomenon of considerable force and scale, with nearly a million views of the main thread on AudioKarma [http://www.audiokarma.org/forums/sho....php?t=150939]. I well recognize it's a Dreadnought/Juggernaut of substantial influence and credibility, and I am trying to handle that responsibly. With 1100+ posts 90,000+ views, "Flex It" now dominates Tech Talk's own post and view statistics, as well. I have concentrated discussions there intentionally as opposed to multiple smaller threads which might come to dominate the index pages, and will continue this policy.

    Thank you for your ongoing cooperation in this effort; there is no reason to abandon your individual "Business-as-usual" participation as any consequence of EconoWave's presence here. There is also plenty of room for exploration of loudspeaker design options, including many alternatives, and in my view, I am pleased that Tech Talk is able to embrace any and all of them.

    Today I awake to discover that my other favorite project, Karma Indignia, is the featured project in the new Parts Express sales flyer, “New and Innovative Products for 2011” @ P. 16. Needless to say, 2010 has been good a vintage year for me here in Tech Talk....

    http://www.parts-express.com/salesflyer/index.html
    Last edited by Zilch; 12-31-2010, 10:37 AM.

    Leave a comment:


  • Zilch
    replied
    Re: Flex Your PCD Mettle:

    Johnaec-design legacy SR Compact KD kit $300/pair plus shipping available in 2 - 3 weeks, including metal perf grilles. PM for details.

    John's original build thread is here:

    http://www.audioheritage.org/vbullet...itors-Finished

    Leave a comment:


  • bj_ninetysix
    replied
    Re: Flex Your PCD Mettle:

    Any thoughts on the Selenium 12PW3 woofer? It's cheaper than the PA310, has lower power handling and xmax but 97 db spl @ 1w/1m. I could only find a single member on AK forums that used this combination(although I couldn't read through the rest of his posts for more details because I am still awaiting registration approval).
    Would this driver be a suitable alternative for the PA310 or DC300?

    Leave a comment:


  • NEO Dan
    replied
    Re: Flex Your PCD Mettle:

    Originally posted by stgdz View Post
    Can the dayton waveguide on the regular econo wave be used on the SR as long as the C/D is maintained? Still waiting on the 152i waveguides.
    That would be the SR Compact version.

    Leave a comment:


  • stgdz
    replied
    Re: Flex Your PCD Mettle:

    Can the dayton waveguide on the regular econo wave be used on the SR as long as the C/D is maintained? Still waiting on the 152i waveguides.

    Leave a comment:


  • JoMoCo
    replied
    Bandaid or Better for Cone Breakup modes?

    Originally posted by Mayhem13 View Post
    Perfect example of MFGR's measurements not being accurate....an all. The Eminence graph shows NO such breakup indicated by your measurments. Thanx for al the hard work.......and saving me the trouble on the Pro-12A's
    Originally posted by dantheman View Post
    That's unfortunately why I bought the speaker--the manufacturer's graph looked good. You just can't trust them. :(

    Edit: You're welcome. Sorry I didn't say it in the first place, your comment flipped my rant switch.

    Dan
    Don't know if you have ditched your Pro 12A's...read your comments / data back in August (post 643-50) on the Pro 12A's breakup modes...I have noticed that some euro's are using a non drying coating on their high end coaxial LF cones that assumptively has the potential to moderate some breakup issues...as always...YMMV

    Leave a comment:

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