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Any 4 ohm NS6 designs out there?

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  • 300Z
    replied
    Re: Any 4 ohm NS6 designs out there?

    Thank you, I'll look into it.

    Leave a comment:


  • Chris Roemer
    replied
    Re: Any 4 ohm NS6 designs out there?

    "XOverSim.exe" (by Isaac MCN) w/mfr. plots and a "generic" BSC curve. Some phase data is simmed, but I do NOT account for XYZ offsets (so PCD should give a lot tighter results), esp. if you use response modeler and min. phase files.

    Leave a comment:


  • 300Z
    replied
    Re: Any 4 ohm NS6 designs out there?

    Thank you, what did you use for simulation?

    I'm planing on building the box in the next week or two and start with the measurements.

    Leave a comment:


  • Chris Roemer
    replied
    Re: Any 4 ohm NS6 designs out there?

    2nd order HP w/L-pad: 10uF series cap, 0.30mH shunt coil (to gnd), "L" SR=3n (ohms), PR=10n
    normal polarity on tweeter

    tanked 2nd order LP w/Zobel: 1.2mH series coil (low DCR, maybe "I-core") w/a tiny 0.44uF cap in parallel w/this series coil, 3uF shunt cap, Zobel (across woofer terms) = 8n resistor and 22uF cap

    About 86dB w/+3dBSC. Fc near 2.1kHz.

    Leave a comment:


  • 300Z
    started a topic Any 4 ohm NS6 designs out there?

    Any 4 ohm NS6 designs out there?

    I have a pair of the 4 ohm Aura NS6 drivers and a set of Seas 27TDFC tweeters that I would like to use on this build, would like to keep it simple and not spend much if possible.
    Box will be ~20L tuned at 45hz and a stepped 15mm woofer baffle .
    Fc around 2.5khz 12dB/oct but will have to run measurements to see what's best.
    Undecided on port location, front or rear.
    This will most likely be used nearfield in a work desk or stands near the wall and not played loud, will be amped by a Lepai LP-2020A+. Trying to use as much parts as I already have.
    Front baffle dimensions.
    24cm wide
    40cm tall
    I'll run FR and phase measurements once I build the box, but I can't do impedance measurements at the moment.
    I never built passive crossovers before, always gone the active route so I have no experience designing passives.
    I have a spare DCX 2496 that I can use to simulate and try some crossover settings and FR shaping before building a final passive crossover, but like I said I would just like to keep it simple as this will be used in my small office/workshop and not have that much use.
    I also have a set of Vifa BC25SC06-04 tweeters and B&C DE10 drivers but no waveguide for it, but would prefer to use the Seas tweeters.

    Any help would be very much appreciated.

    My main system uses B&C 8PS21 woofers and JBL 2408H drivers on the JBL 6x6 waveguide, MiniDSP bi-amped. Dual Aura NS8 for subs nearfield.
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