Announcement

Collapse
No announcement yet.

Flex Your PCD Mettle:

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Re: Flex Your PCD Mettle:

    What was your question?
    :D
    http://www.nytimes.com/2010/10/14/bu...html?src=busln

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

    Comment


    • Re: Flex Your PCD Mettle:

      Sounds great, smooth mids and highs, low max power, high sensitivity, 60hz crossover point, which build? deluxe, HO, Delite 12 or SR?

      There, is that better? :p

      C.

      Comment


      • Re: Flex Your PCD Mettle:

        Originally posted by stgdz View Post
        Got them hung up tonight

        Wall mounted boxes angled down ....... brilliant. Where have I seen that before?

        ;) ;)

        Man, Stgdz, what to heck are those little stubby studs attached below the single? top plate of your walls?

        Comment


        • Re: Flex Your PCD Mettle:

          Originally posted by Cerdic View Post
          Sounds great, smooth mids and highs, low max power, high sensitivity, 60hz crossover point, which build? deluxe, HO, Delite 12 or SR?

          There, is that better? :p

          C.
          Draw up your 1.5 ft3 box and run the box models. Does one stand out for lower-end performance? All were built in the PE trap cab (~1.6 ft^3?) which probably isn't optimal for for any of them.

          The SR is clearly the budget-friendly choice due to the bolt-on selenium driver.

          Comment


          • Re: Flex Your PCD Mettle:

            Originally posted by Cerdic View Post
            Sounds great, smooth mids and highs, low max power, high sensitivity, 60hz crossover point, which build? deluxe, HO, Delite 12 or SR?
            NQ is HO, basically; Brandon has not yet posted his passive crossover for it. Of my builds of your options, I like Deluxe best. SR's a worthy "budget" alternative.


            Originally posted by Flacjunky View Post
            Man, Stgdz, what to heck are those little stubby studs attached below the single? top plate of your walls?
            SawZall practice.... :p

            Comment


            • Re: Flex Your PCD Mettle:

              From another forum:



              Vintage cab, vintage woof, eWave SR HF:

              http://www.diyaudio.com/forums/multi...ml#post2285439
              Attached Files

              Comment


              • Re: Flex Your PCD Mettle:

                Originally posted by Zilch View Post
                SawZall practice.... :p
                That and a valuable lesson of check twice before doing something. I was trying to do a staggered stud build but I didn't buy a 6" top and bottom plate. So I had studds placed 8" apart, bad for sound proofing. Well stgdz why don't you just replace the wall you say? Well my father in law who always over builds everything used bolts for holding the bottom plate to the wall and there is no way we are getting them out of the cement.

                So a valuable lesson but I don't think there is much I can do with sound proofing when it comes to these massive speakers and subwoofers I built.


                Also Zilch, I know you are in Cali. If you are near costa mesa you should really swing by QSC sometime and listen to their 2150's. Its a 3 way speaker but the mid range on it works so well with the woofers and the compression driver. The only thing I don't like about them is they are a bit bright on the top end
                http://stgdz.shackspace.com/Shack/ho...ll%20range.jpg
                My simple speaker project
                My simple subwoofer project

                The Inlaws Hometheater

                Comment


                • Re: Flex Your PCD Mettle:

                  Originally posted by stgdz View Post

                  Also Zilch, I know you are in Cali. If you are near costa mesa you should really swing by QSC sometime and listen to their 2150's. Its a 3 way speaker but the mid range on it works so well with the woofers and the compression driver. The only thing I don't like about them is they are a bit bright on the top end
                  http://stgdz.shackspace.com/Shack/ho...ll%20range.jpg
                  Are these it???
                  http://www.qscaudio.com/products/spe...dcs_sc2150.htm

                  The CLONE;
                  http://www.avsforum.com/avs-vb/showthread.php?t=1173647

                  I hope these are the exact part number. I ordered a pair at QSC for $72... They don't show a picture of the item...

                  http://www.qscparts.com/ and enter part# in search field... PL-000447-GP

                  Comment


                  • Re: Flex Your PCD Mettle:

                    Right now, with the good words said about the "budget" SR build, it's looking like a my likely choice. I'm liking the way the PA310-8 is modeling for my application in WinISD. I don't know how to post graphs well, but here's what I came up with, ASSuming the goal is a flat power transfer fxn/SPL graph through my desired x-over frequency.

                    It modeled best for me in a 1.7-1.8 cuft net enclosure, which should be a 25x16.5x12.25, NQ size enclosure with a double front baffle, with space for bracing, drivers, and port.

                    With a 53hz tune, it produces an F1 at 61hz, F3 at 53hz, and F10 at about 42hz - adequate for a 60 or 80 hz electronic xover. At my receiver's power of 100w, xmax is controlled at 3.5mm with a predicted 115db (not accounting for baffle step), 200w brings it up to 4.5mm. With a 60hz x-over, and single 4" port, port speed is a lazy 13m/s, not necessitating extensive port flaring.

                    The 2512 could dig lower, but wanted a 3-4cuft box, The 3012 HO hasn't yet modeled well for me as yet. Haven't modeled the 3012 LF yet, but the PA310-8 seems to do well with a smaller box and judicious power input - though probably enough to make your ears bleed, and outstrip my current subwoofer.

                    Newbie Questions: Is it best to have a completely flat SPL graph in these freq ranges, gently falling, or..? It seems like it's always easier to "cut" a bit of output from a flat graph if room gain adds a bump, than overestimating room gain and having to add boost to smooth it out. I don't think my 3500cuft room is going to add much, but near boundary placement may. What do I look for in the graphs for your projects Zilch to figure out if you added in baffle step correction and how much? Do you think the SR x-over design as it stands will work well for near/on boundary placement?

                    Best,
                    Christopher

                    Comment


                    • Re: Flex Your PCD Mettle:

                      Reduce the enclosure size to 1.5cuft and set Fb to 60hz. With an 80hz XO, you'll never hear the difference. Power handling increases and impulse response smooths a bit as well.

                      Comment


                      • Re: Flex Your PCD Mettle:

                        Originally posted by Zilch View Post
                        From another forum:



                        Vintage cab, vintage woof, eWave SR HF:

                        http://www.diyaudio.com/forums/multi...ml#post2285439
                        any idea why there haven't been more horn loaded woofer builds like klipsch heritage line?
                        My simple speaker project
                        My simple subwoofer project

                        The Inlaws Hometheater

                        Comment


                        • Re: Flex Your PCD Mettle:

                          Originally posted by stgdz View Post
                          any idea why there haven't been more horn loaded woofer builds like klipsch heritage line?
                          Because you need a 2000 sq foot living room to accommodate the size of the horns?
                          R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio

                          Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51


                          95% of Climate Models Agree: The Observations Must be Wrong
                          "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

                          Comment


                          • Re: Flex Your PCD Mettle:

                            Ok Zilch, i'm gonna take the Ewave plunge with Deltalight 2510's since i have a pair already!:D

                            Some background....these will be sitting on top of two stereo bass bins using Dayton RSS315HF's tuned to 20hz and powered with 400w each. I can selectively cross these from 240hz on down. Deltalight 10 shows an F3 of 95hz sealed in 30L so i think i'll take that route.

                            Didn't care for the results of the 122i and not sure if 152i is just too damn wide to mate with these. XT1046 is really nice........and REALLY expensive! 612 has worked really well in the development stage.......and is pretty hard on the eye.

                            Which do you suggest from the listening ear.....or do you have something else up the sleeve?

                            Comment


                            • Re: Flex Your PCD Mettle:

                              Originally posted by Mayhem13 View Post
                              Which do you suggest from the listening ear.....or do you have something else up the sleeve?
                              What HF driver did you run on 612?

                              Never tried DE250 on 122i; Delite 10e was based upon Celestion 1425 and crossed high. It may work out better with DE250.

                              All variants you are contemplating will require crossover development work except Delite 10 using XT1086. None on eBay active or completed right now, but we know they're out there. Penn have a pair he'll sell you, maybe?

                              Comment


                              • Re: Flex Your PCD Mettle:

                                Zilch, Pete, see the original post:

                                http://techtalk.parts-express.com/sh...&postcount=153
                                Mongo only pawn in game of life
                                ____
                                Ed

                                Comment

                                Working...
                                X