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  • System Power Question

    Hello all
    I realize the below may be a bit formal, but I wanted to present as much info on this
    John
    Anything is easy when you know how

  • #2
    Actually, thank you for providing the details, and not expecting miracles. Being particular and paying attention to seemingly trivial details is what can separate a real success from a real failure in this business (as in IT....I'm in the biz too).

    In my opinion what you have now is fine for the tasks you've described. Be sure to HPF the subs at a reasonable frequency (the box resonant Hz is fine).

    Keep the amp racks small as possible. The HF amp could be another of the Crest's if you limit in the DR260 to the recommended power. This would give you some flexibility in using that amp for a spare or for any of the more unusual gigging arrangements, simply by adjusting your limiter for more power. It's one of the few times a bigger amp than needed is a good idea and not wasted money.
    "If you don't know where you are going, you might wind up someplace else" - Yogi Berra, 1925-2015

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    • #3
      Thanks Craig

      Any thoughts on running the mid and high amps at 2 ohms for the night? (assuming an all Crest system)
      Thx
      John
      Anything is easy when you know how

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      • #4
        I'd swap the mid and sub amps, use the 4k on subs and 2.8k on mids. The 1800 would be a great on horns, even something the next size down too. 3 boxes per side would bring the nominal impeadance down to 2.6ohms and I just don't see a problem with it. You may find you want more subs and that config you could add another pair @ 2 ohms or add/rent another cc4k.

        Looking at the 4ohm spec of the subs maybe the 4k should be on mids then. oh well.

        DR260 is a great controller, make a patch panel too.
        sounds like a great rig!
        www.rock-bot.com
        Live-Band-Karaoke

        bassist and sound reinforcement

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        • #5
          Thanks for the comments.

          I'm fortunate to have this rig. It is perfect for indoor gigs up to 300 or so people. (easier on the back muscles too )

          I use the CC 2800 on the sub because it matches the sub 4 ohm power spec pretty good. The CC 4000 seems to work a bit better on the mids.

          Good to hear I'm not headed down a wrong path on the 2 ohm load. I've never ever run any rig down to 2 ohms, but the venue we just picked up has an odd shaped room and 3 mid/high cabs per side works well for directional coverage.
          I'm going to test it and see what happens.
          John
          Anything is easy when you know how

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          • #6
            You'll find the tops will out run the subs with 3 per side. Even still you're only at 2.6ohms per channel.
            www.rock-bot.com
            Live-Band-Karaoke

            bassist and sound reinforcement

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            • #7
              My only issue with running 2(ish) ohms into midhighs is that if an amp ever fails, you're up the creek, no paddle. It's best to plan your rig to run into 4 ohms, and use a 2 ohm arrangement as backup for aforementioned failures.
              "If you don't know where you are going, you might wind up someplace else" - Yogi Berra, 1925-2015

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              • #8
                I don't see any problem.

                The 4000 on mids, the 2800 on subs and whatever (I would suggest a smaller CC on tops) and set your limiters, xover parameters and sub HPF properly and you are good to go.
                -------------------------------------------------------------------------------------------------------------------------------------------------------------------
                Former product development engineer: Genz Benz, a KMC Music/FMIC/JAM Industries Company, continuing factory level product support and service for Genz Benz

                Currently product development engineer: Mesa Boogie

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                • #9
                  Thank you all for the comments

                  I'm thinking I'm on the right track.

                  It's great to know I have friends "in the business" to keep me on the straight and narrow.

                  The people that make up this forum are an invaluable resource.

                  Thanks again for your unselfish and valuable advice.
                  John
                  Anything is easy when you know how

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                  • #10
                    You are most welcome.

                    And to think I just got a PM from somebody that questioned my helpfulness. Oh well.
                    -------------------------------------------------------------------------------------------------------------------------------------------------------------------
                    Former product development engineer: Genz Benz, a KMC Music/FMIC/JAM Industries Company, continuing factory level product support and service for Genz Benz

                    Currently product development engineer: Mesa Boogie

                    Comment


                    • #11
                      Andy, I may not always agree with you, but you never fail to offer useful and valid information.

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