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Thread: Speaker porn

  1. #21
    Join Date
    Feb 2008
    Location
    Columbus
    Posts
    2,088
    Blog Entries
    5

    Default Re: Speaker porn

    Quote Originally Posted by markk View Post
    It's not orange though. It's copper. Exactly like the Excels. No one seems to think they are homely.
    I think the Excels (with copper) are homely. I like the black phase plugs on Seas woofers, not the ugly copper ones. Copper should be hidden on the inside of the motor structure.

    Whats even worse than ugly copper is FAKE copper, those aren't fake copper, are they?

    I also think the choice of copper for the phase plugs on the new Dayton full range woofers is really ugly. Did copper win the poll? I thought we voted against copper? (Remember they took a poll about a year ago?)

    EDIT: well, if they sound good, I wouldn't mind. If you covered the cabinets in copper sheet, maybe I would like that. I guess they look kind of cool anyway.
    If it's a "stand mount" or "bookshelf" speaker, it's simply not a "no compromise" speaker.

  2. #22
    Join Date
    Feb 2010
    Location
    Salem, Oregon
    Posts
    330

    Default Re: Speaker porn

    Quote Originally Posted by critofur View Post
    I think the Excels (with copper) are homely. I like the black phase plugs on Seas woofers, not the ugly copper ones. Copper should be hidden on the inside of the motor structure.

    Whats even worse than ugly copper is FAKE copper, those aren't fake copper, are they?

    I also think the choice of copper for the phase plugs on the new Dayton full range woofers is really ugly. Did copper win the poll? I thought we voted against copper? (Remember they took a poll about a year ago?)

    EDIT: well, if they sound good, I wouldn't mind. If you covered the cabinets in copper sheet, maybe I would like that. I guess they look kind of cool anyway.
    That's what I was talking about, the new daytons and tang bands look bad. I think the best looking copper phase plug was on the CSS full ranges. Although I thought the daytons were fake copper like the tb. I do like the copper seas phase plugs though.

    Dan

  3. #23

    Default Re: Speaker porn

    fyi

    I've got a set of measured curves in box for the W3-1878 driver with a simple parallel LCR and also an added LR shelf at my blog for those who are curious. Because of the raw in box response, a simple trap works well for both baffle step and FR contouring.

    I'll try to send Zaph the drivers somewhere in the near future so he can test them as well.

    http://www.audioheuristics.org/markk_wp/

  4. #24
    Join Date
    Jul 2006
    Location
    Davis, CA
    Posts
    2,064

    Default Re: Speaker porn

    Hmmm, interesting little project there, Mark. It's topical for me, because my wife recently pointed out to me that we don't have any computer speakers (I usually wear headphones). I happen to have a 12" driver in a 1 cuft box under the desk that is begging for a LT circuit. This could anchor the low end nicely, but it needs some small speakers that would fit on either side of the monitor to make it come together. Looks like the TB 3" can be crossed over around 150-200Hz. How would you feel about its low frequency performance, if used at 2 feet listening distance, wall mounted?

    I think that you mixed up your text regarding the rising response above 10k:
    The 15 degree off axis curve for the unit without the shelf looks just like the red curve, so toe the speakers if you think you hear the rise.
    Did you perhaps mean that, if you think you can/will hear the rising response and won't like it, you should NOT toe in the speakers. That way you would be listening to the speaker off axis, where the response is drooping compared to on axis, and the response at the listening position will be flattened out.

    Keep us posted on this!

    -Charlie
    Charlie's Audio Pages: http://audio.claub.net

  5. #25
    Join Date
    Jul 2006
    Location
    Davis, CA
    Posts
    2,064

    Default Re: Speaker porn

    Here is a nice alternative to the Topping TP30 amp that I plan to use:



    It's a dual 25W amp that uses a Sanyo STK chip sold by ApexJr. I already have a pair of these in my attic that I intend to use in a budget active speaker project. I have tested it out and can say that the amp is not bad. I was able to find the data sheet for the STK 4141V IC, and it has pretty good distortion (0.08%) and about 2dB of headroom using the transformer that Apex sells along with the amp. IIRC the DC rails are in the low 30V range, and according to the spec sheet the STK IC can produce about 45W in to 8 ohms.

    It's possible to disassemble the unit--removing the ugly plate and an internal circuit board with some extra stuff on it leaves the heat sink and the amp board. This would make for a cleaner looking install. The amp board has on board +/-12VDC, so it would be easy to connect some line level circuitry for a 150 Hz HP crossover (e.g. for integration with my subwoofer). The input sensitivity is only 100mV or so, so you need to take care about the input level.

    -Charlie
    Charlie's Audio Pages: http://audio.claub.net

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