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Flex Your PCD Mettle:

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  • Re: Flex Your PCD Mettle:

    Anyone hear from Zilch lately? It seems like a while since he's posted anywhere. I hope he's doing okay.

    Maybe he's on vacation or went to China to get one of those fancy JBL or QSC wave guides duplicated. :D

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    • Re: Flex Your PCD Mettle:

      I am sure he's refining 12 projects, and planning a dozen more.

      That guy is missed when he's not around.
      http://www.nytimes.com/2010/10/14/bu...html?src=busln

      http://mixonline.com/mag/audio_new_york_metro_46/

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      • Re: Flex Your PCD Mettle:

        Originally posted by MSaturn View Post
        This thread is absurdly long.
        Yeah...i say we contact the Mods to lock it and start another MT 2way with a 1" dome tweeter.:rolleyes:

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        • Re: Flex Your PCD Mettle:

          After spending a good 7 hours reading this thread over 2 days, I am jumping in with the e-wave mini...Beta 8A, D220ti, and HM17-25.
          Just ordered some of the parts.

          I think this could be become the basis of a real hi-end system if I can turn it into a 2.5 way. The .5 woofer being a 12" or 15".

          Could even consider the "single sheet challenge" tapped horn over at diyforum for the .5 (using the Kappalite 3015LF)

          Maybe a transmission line with a Delta 15LF. Who knows?

          Will keep ya posted.

          Randy

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          • Re: Flex Your PCD Mettle:

            Randy,
            The ".5" woofer should be exactly the same as the main woofer, otherwise it may not sum correctly when both woofers are playing together to buttress the low-end range. So, you'd need a pair of the Beta 8As per speaker to do it.
            http://www.nytimes.com/2010/10/14/bu...html?src=busln

            http://mixonline.com/mag/audio_new_york_metro_46/

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            • Re: Flex Your PCD Mettle:

              I am leaning toward a separate amp for main speakers and subs now. The new Crown Drivecore amps are very inexpensive and have 24db LR filters built in, so I am thinking Ewave mini down to 100hz then maybe a tapped horn for 35 to 100hz. I just have to research some plans.

              But I plan on building a few different subs.

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              • Re: Flex Your PCD Mettle:

                I'm currently running something very similar to the EWave Deluxe with B&C DE500 on a QSC 152i (is that right? the one everyone's using) over an AE TD15M in an active setup.

                I don't have much experience with crossovers though and am always tweaking something here and there. Right now I'm crossing LR24 at 1.2kHz. I was wondering if someone could help me translate the crossover for the EWave Deluxe to what I would input on my Behringer DCX2496 to try out? Maybe even just the filters to smooth the CD out actually (I'm not very confident I'm using the appropriate filters to compensate for the waveguide)?

                I had also considered building the passive XO for the EWave Deluxe but wasn't sure what to build. The main posts has two links for the Deluxe one around page 2 that eventually has a very simple XO posted by Pete and then one to a post much later with a much more complex XO?

                Any input would be greatly appreciated

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                • Re: Flex Your PCD Mettle:

                  The passive crossover is pretty critical in all these designs. I wouldn't recommend going active.

                  http://techtalk.parts-express.com/sh...79#post1626379

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                  • Re: Flex Your PCD Mettle:

                    Originally posted by ontariomaximus View Post
                    The passive crossover is pretty critical in all these designs. I wouldn't recommend going active.

                    http://techtalk.parts-express.com/sh...79#post1626379
                    Thanks! Any input into why active isn't recommended? Now that I look at the XO's I see the one on page 4 is pretty much the same as the 5 component one Pete posted on page 2. I could probably skip the L-Pad and use the DCX to shape the response - I guess that would only be around $50 in parts.

                    The problem is I'd like to try to cross a bit lower than this since I'm using a 15" instead of the 12" the Deluxe uses - the vertical window will be even smaller :o

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                    • Re: Flex Your PCD Mettle:

                      The eWave mega-thread at AudioKarma has info on using active crossovers. Search the thread for DCX2496 and you might find it pretty quickly.

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                      • Re: Flex Your PCD Mettle:

                        Originally posted by donprice View Post
                        The eWave mega-thread at AudioKarma has info on using active crossovers. Search the thread for DCX2496 and you might find it pretty quickly.
                        Thanks! I'll have to look that up

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                        • Re: Flex Your PCD Mettle:

                          come back zlich we miss you.
                          My simple speaker project
                          My simple subwoofer project

                          The Inlaws Hometheater

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                          • Re: Flex Your PCD Mettle:

                            Originally posted by ontariomaximus View Post
                            The passive crossover is pretty critical in all these designs. I wouldn't recommend going active.

                            http://techtalk.parts-express.com/sh...79#post1626379
                            Why??

                            Active removes so many issues that handcuff passive designs.

                            The design behind the passive crossover is critical to the design NOT the passive crossovers themselves. All my QSC builds are active and not passive.

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                            • Re: Flex Your PCD Mettle:

                              Originally posted by stgdz View Post
                              come back zlich we miss you.
                              I agree, it's been quite a while since he's posted anywhere. I've sent him a few emails about the prototype waveguides but haven't heard back. He's usually pretty quick with responses.

                              Hopefully he's doing okay and just took some time off from the 'interwebs' to get other stuff done. I'd make a quick call if I knew his number.

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                              • Re: Flex Your PCD Mettle:

                                He is active at AK
                                Regards,
                                Dan

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