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What I've found and been working on...

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  • What I've found and been working on...

    You all may have seen my topic asking for tips about the SR-X series of speakers...I got a chance to dig under the stage and look around...the system that was used before consisted of

    - 2 SR4733X's on a QSC PLX2402 stereo
    - 4 Yamaha SW118IV loaded with Eminence Omega Pro cabs on a QSC PLX3402 stereo

    There was also a QSC RMX2450 sitting around (from what I understand it was hooked to an HDH3 cabinet with a blown Black Widow and another Omega Pro driver...) After some looking around, I found a couple cabinets in the back...they turned out to be JBL AS1028-SP/2XP cabinets (dual 18")...Both had one blown JBL 2241HPL drivers + one Eminence Omega Pro (one of those was blown)...pulled the two JBL 2241HPL's out plus the bad Omega Pro, and swapped the good Omega's from the Yamaha cabinets into the AS1028's.  So now, the system is set up and configured as

    - 2 SR4733X's on the PLX3402 stereo
    - 2 JBL AS1028's with Eminence Omega drivers, each on a QSC PLX2402 and RMX2450 in bridge mono

    There is also a set of JBL dual 8" mids and separate horn units hanging on the ceiling powered by a Peavey CS800.  Those may be put on an aux send later on, as they are not really needed.  The owner is planning on having the two 2241's reconed (I have a friend who is going to do that) and purchase another pair to put them back in the cabinets.  But it will work for now..

    (Sorry for the picture quality, it was 3AM and we were ready to go home...lol)

    stage
    (Link has been fixed)

    Attached Files

  • #2

    Sounds good on the tops but 1200W into each 18" driver on the subs is gonna be adding to that pile of blown drivers methinks  . If I was stuck using whatcha got I'd put the PLX2402 back on the tops and the PLX3402 back on the subs, one 2x18 per channel. How big is the venue anyways? That should be plenty slamming for 350 or less .

    Comment


    • djiceman1575
      djiceman1575 commented
      Editing a comment

      In that configuration, the subs were only getting 1100 watts per pair.  With each amp running bridge mono, each pair is getting 2400 watts.  I'm not 100% sure how Eminence rates their speakers, but they are 800w standard, 1600w music program, so I'm going to go with 800w RMS.  They are being fed a clean signal with a limiter on a DBX Driverack set up so they don't go overboard.


  • #3

    I used those cabs for 4 years and they are good cabs. I don't think I EVER ran out of SPL with them....

    Notch out the 4k honk they have just a little and they sound great. One of the few 2x15 cabs I truly like. They also make great side fills or drum boxes on large stages.

     

    Good job!!!

    Comment


    • #4
      1100 watts per cabinet is just about right.

      It's critical to verify the polarity of the entire signal path, the 2241 uses reversed polarity (assuming it retains the legacy standard of the 2200 series) and bridging sometimes inverts the signal depending on the amp architecture.

      This is something I see with regularity and is responsible for poor system performance.
      -------------------------------------------------------------------------------------------------------------------------------------------------------------------
      Former product development engineer: Genz Benz, a KMC Music/Fender Musical Instruments Company, continuing factory level product support and service for Genz Benz

      Currently product development engineer: Mesa Boogie

      Comment


      • Mogwix
        Mogwix commented
        Editing a comment

        agedhorse wrote:
        [...] bridging sometimes inverts the signal depending on the amp architecture.

        I was doing an experiment on some basic common-emitter BJT amplifiers and found the output to be 180 degrees out of phase with the input... does your comment have something to do with that?


      • RoadRanger
        RoadRanger commented
        Editing a comment

        agedhorse wrote:
        1100 watts per cabinet is just about right.

        Some folks would look at that pile of burnt up drivers and figure maybe pushing them hard didn't work out so good. Others need to learn the hard way  .


      • Bugzie
        Bugzie commented
        Editing a comment

        "It's critical to verify the polarity of the entire signal path, the 2241 uses reversed polarity (assuming it retains the legacy standard of the 2200 series) and bridging sometimes inverts the signal depending on the amp architecture.

        This is something I see with regularity and is responsible for poor system performance."

        Thanks Andy, I really appreciate when you share you're experience. You may have just given me the answer to a problem with an old system at a local pub. It just doesn't sound right and they did have a few recones done a couple of months back. I was planning on stopping in for lunch and that could be a really quick fix. Worth checking anyway.



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