OpenBaffle

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    OpenBaffle on · in reply to: 16ohm wiring #10916

    I assume the above is wrong.

    16 ohm wiring

    – from red terminal 1 to black terminal 2 , woofer terminals
    -from black terminal 1 to Power amplifier black
    -from red terminal 2 to Power amplifier red


    Member
    OpenBaffle on · in reply to: Comb filter effect with two Dipole 15 ? #10908

    After more investigations it seams to be a common understanding that placing two woofers vertically to each othre is no good idea when it comes to comb effects if both woofers play above 250hz.

    Refer to MeyerSound

    “The X-800 houses two Meyer Sound long-excursion 18-inch drivers in a tuned, vented cabinet. The X-800 output rolls off well below 250 Hz, avoiding any adverse comb filtering effects that could be generated by the proximity of the dual drivers.”


    Member
    OpenBaffle on · in reply to: Comb filter effect with two Dipole 15 ? #10907

    Calculated the frequency response using Tolvan caluclating program shown no dip and very little effect on the frequency response abov 300hz at a 4m distance to seat due to comb filtering effect ? No dip could be seen.

    Tolvan also show that the dB effect of using 2 woofers instead of one on a baffle 96cm width compared to 48cm which will be increased about 2-3dB at 30hz and also lowering the start of the baffle step about 100hz, from about 350hz to 250hz.

    By using two woofers instead of one will the speaker be more directive i.e will the horisontal directivity be more pronounced. This is what JBL claim and mentioned as the reason for crossover one woofer at 150hz. The midrange/tweeter JBL horn have about 90 degree dispersion as the Altec 511B.

    Any problem with the disperison when using two woofers compared to the horn ? How much will it change ?

    Thanks for info.


    Member
    OpenBaffle on · in reply to: Comb filter effect with two Dipole 15 ? #10904

    Why roll off at higher frequencies ?

    Will use computer program for the crossover, which also include EQ compensation for the baffle step and room compensation.


    Member
    OpenBaffle on · in reply to: Woofer binding posts quality #10752

    But the dipole woofers are not mainly PA woofers. For the home high fidelity users and more appropriate binding posts would probably be appreciated by the customers.


    Member
    OpenBaffle on · in reply to: Rubber seal, any good idea to use it when mounting #10696

    Any link or picture of an appropriate wheather strip to use.


    Member
    OpenBaffle on · in reply to: Dipole 15 mounted from the magnet #10712

    Why not include in the design bolt holes at the back of the units for “rear mounting” as this probabaly will give even better performance.


    Member
    OpenBaffle on · in reply to: Combine Dipole 15 and dipole 18 open baffle #10638

    How would you regard the lower bass quality from two Dipole 15 compared to a Dipole 18 ?

    Delivery time for an additional pair today.


    Member
    OpenBaffle on · in reply to: Choose between Dipole 15 or Dipole 18 #10522

    Ordered the Dipole 15 today due to more options of high frequency units and higher crossover frequency in the future.


    Member
    OpenBaffle on · in reply to: Whcih Dipole 12, 15 or 18 to choose #10412

    Are there any other Acoustic Elegance options than the Dipole 12,15 or 18” that may be considered in these application.
    I.e open baffle below 1000hz an Acoustic Elegance Woofer/Midwofer, and above 1000hz Altec 511B horn.

    What I am looking for is the best Acoustic Elegance unit with the best midrange up to 1000hz in an open baffle but I am not looking for
    maximum SPL. (One or two EA units in an open baffle).

    I read about the LO15 with cloth surround for better midrange.

    Or will the Dipole 15 be the optimal ?

    BR
    Lars

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