Zilch's AK Design Collaborative - Econowave Speaker

Discussion in 'Speakers' started by Zilch, Feb 23, 2008.

  1. skywave-rider

    skywave-rider Slumming in Akihabara Subscriber

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    Russellc:
    Here's a link to links regarding 2 crossovers which work with the 4552ND and 4550:
    http://audioheritage.org/vbulletin/showpost.php?p=208273&postcount=192

    One proviso: I don't yet know which variation of N-800-F I am using; and I will open that and scope it. What will work with your low end, I could not tell you.

    These crossovers have good compensation without any additional tweaks.
     
  2. Zilch

    Zilch Curve Junkie Subscriber

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  3. skywave-rider

    skywave-rider Slumming in Akihabara Subscriber

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    Zilch, tomorrow I'm taking the N-19Zs home to try on the econowaves, with BMS and with Selenium.

    This is what we call "fun."

    RusellC, I think you'll really like the top end on those Z models.:thmbsp:
     
  4. Russellc

    Russellc AK Subscriber Subscriber

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  5. Russellc

    Russellc AK Subscriber Subscriber

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  6. Russellc

    Russellc AK Subscriber Subscriber

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    Right, I just wanted to see what the top end looked like, I will also await what you find out about your altec crossover. I also want to try the BMS on my A7s, so it should be usefull there as well. Thanks for the links!

    Russellc
     
  7. Greyhawk17

    Greyhawk17 Well-Known Member

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    E-Waves........

    Howdy Russell,
    Got Woofers cleaned up, 'tearing' into cabs, waiting for parts, JBL's should
    be here this next week,.......Then more parts,....Only have an hour or two
    in any given day, damn!....But that's reality for now,....Hope to have some
    preliminary pics in a week or so.....Upward, onward....Cheers, T
     
  8. Russellc

    Russellc AK Subscriber Subscriber

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    Cool, you're really close. JBL really delivers fast, I think it was a little less than a week, and parts express is about a three day wait. This is all very much worth the effort.:thmbsp: Cant wait to see your pics!

    Russellc
     
  9. Russellc

    Russellc AK Subscriber Subscriber

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    As good as these things have been sounding, adding the 1.5/15/25 circuit is definately, IMO, a huge improvement for woofers in the sensitivity range of the 2225H, which is 97 db.

    I am going to try to get the spare 2225H to the reconers for this weekend,
    pick up some "Zilch plugs" from HD and report that combination when they return and are broken in.

    Russellc
     
  10. skywave-rider

    skywave-rider Slumming in Akihabara Subscriber

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    I'm slow. Starting up.

    I just busted a D220Ti diaphragm...don't know how. I think it's somewhere on the lead from one of the connecting tabs. Last night I carried them from another location. :dunno:

    Ran M19Z xover to see if my FR is anywhere near what Zilch shows at the top of this thread. Looks close.

    Ordering parts for JackGiff's lower efficiency woofer (JBL 123A-1s/90 dB) Econoschematic. Plus a diaphragm.

    Scary how I've gotten used to Garbage Bin cosmetics.

    [​IMG]

    Whoah, bass. I do have it directly on the floor, maybe these are really subwoofers.
     

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  11. Zilch

    Zilch Curve Junkie Subscriber

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    Nothing like 50 Hz boom to entertain the neighbors....

    [Heh, heh. :) ]

    Measure nearfield to see what's actually happening down there.

    You're gonna need some honest-to-goodness fiberglass damping in those Dumpster Bins to tame them.

    Heavy fill with R-15, maybe:

    [​IMG]
     
  12. skywave-rider

    skywave-rider Slumming in Akihabara Subscriber

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    Thanks!
    And the fill will actually extend the bass; simulating a larger volume? So I've read.

    I believe I hear standing wave cancellations in there, as some bass notes go away, softly. Sounds symptomatic? It could be room modes, I don't have the square footage to shuffle them into ideal locations right now.
     
  13. skywave-rider

    skywave-rider Slumming in Akihabara Subscriber

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    Nearfield 123A-1

    Big Bottom.

    Gonna get some fiberglass :)
    [​IMG]
     

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  14. Zilch

    Zilch Curve Junkie Subscriber

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    Woodrows for L100 enthusiasts: Max boom at 56 Hz, and -10 dB at 22.5 Hz. ;)

    Beautiful 12 dB/octave rolloff, but they can't take the power for use as subs, alas. :pity:

    That's how they play 2-Pi; they'd be tolerable in freespace. :yes:

    [More good RTA fun.... :thmbsp: ]
     
  15. skywave-rider

    skywave-rider Slumming in Akihabara Subscriber

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    That curve is sexy, isn't it?

    Well, I broke a D220Ti diaphragm somehow (not through applying power,) so ordered that with the crossover parts.

    Since my dumpster Bins are so trashed, they will get the industrial rug treatment.

    Fuzzy!
    :screwy:
     
  16. Greyhawk17

    Greyhawk17 Well-Known Member

    Messages:
    886
    Location:
    Fountain Hills, Arizona
    E-Waves........

    Howdy,
    Was really pleasantly surprised when I tore apart the RS Nova 8b's, braced
    throughout, and 1" inch thick cab walls, weigh a 'ton', and should be very
    stable/inert,.....Waveguides should here this afternoon, or tomorrow, then
    can get busy on cutting new front baffles, and reseal cabs....Cheers, T
     
  17. Russellc

    Russellc AK Subscriber Subscriber

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    Well, Ive just been informed over at DIY audio dot com that there is very little chance that any waveguide is going to be as flat as we're getting here.
    At first they couldnt believe the price either, but that's pretty much in black and white. I have invited them to come over and check out the RTA results, hopefully they will.:yes:

    Some guy asked if there wasnt some other horn that could be used on a compression driver with a JBL 2226H. I couldn't resist bringing up econowave.

    Russellc
     
  18. skywave-rider

    skywave-rider Slumming in Akihabara Subscriber

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    GreyHawk,
    What are the dimensions of the Nova8Bs?
    I'm thinking our boxes are roughly the same. My OD is about:
    27"x15"x14"
    I'll check volume when I hack it open for new baffles.

    RussellC,
    you're on a mission.
     
  19. Zilch

    Zilch Curve Junkie Subscriber

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    By Earl Geddes, no less.

    Maybe he'll check it out for us.... :thmbsp:
     
  20. Russellc

    Russellc AK Subscriber Subscriber

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    Hey, it is fairly rare to get this much performance out of so little money, I mean really. I can see how it could be dismissed, there's not that much attention here. I see 4313B on the LHF is getting interested in this little wave guide now, Zilch, did you ever hook up a 2425H to one of these fine waveguides? Hopefully more will try this thing out. I really think one just has to hear it to believe it.

    If you've ever had a hankering for Klipsh, Altec or whatever horn deal, you must try this! Hopefully Earl will check it out and comment on this jewel from JBL, selenium, and fine members of our forum like you Zilch, and Jack giff as well as others. Cheaper than Heresy, and smokes A7 at a tiny price, a real goliath killer!:thmbsp:

    Russellc
     

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