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Hey, Pete S., KillerKowalczyk and Curt C.

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  • Hey, Pete S., KillerKowalczyk and Curt C.


    Dan Neubecker has posted (Sunday night) his comments on listening to the RS265 woofers in the 20:1 tapered TL (HOSS project) you all said would have objectionable noise from the terminus because its area was too small and from the blocks inserted into the last line segment to reduce the area. I'll let Dan's comments speak for me.
    Paul K.

  • #2
    It's all in the listening.


    > Dan Neubecker has posted (Sunday night) his
    > comments on listening to the RS265 woofers
    > in the 20:1 tapered TL (HOSS project) you
    > all said would have objectionable noise from
    > the terminus because its area was too small
    > and from the blocks inserted into the last
    > line segment to reduce the area. I'll let
    > Dan's comments speak for me.
    > Paul K.

    I built my DPL-12 subwoofer using ports that "supposedly" had air velocities below the "objectionable" limits, but when I tone-tested the sub, I could localize it due to vent noise. During most music or program material, I didn't notice it. But when the signal was band limited to the lowest octaves, as in the rumble of a spaceship or aircraft carrier during movies, I could hear the noise. So a PR was used instead.

    So if music was the end goal, I could have stuck with the ported version since the noise was masked pretty well by the rest of the program material.

    I'd be real curious to see how it does with something more band-limited to the first couple octaves.
    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

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    Comment


    • #3
      Re: I look at it like this...


      Say your car has tires that use 6 lug nuts. Now, a computer program tells you that you can safely drive with only 3 of them on. I don't know about you, but I tend to go that extra little bit, especially when I am afraid I might have port noise. I have fought with port noise many times...even when the programs told me that the mach number would be acceptable. I guess that when it comes to ports, I don't like to be an innovator, I like to play it safe. Kudo's to you for hanging it out there!

      Comment


      • #4
        Woah Woah Woah, guyyyys


        Your totally not full of yourself, Im honestly glad you chimed in and let me know that everything went alright. Now I have a little more knowledge on transmission lines.

        Im sure Pete has a point with limited frequencies causing noise, but who knows.

        I think everyone around this board needs to take a more relaxed approach to things. Unless ofcourse someone really pisses you off, like that Rob guy, what ever happened to him, I think I scared him off, no hard feelings Rob if your reading this.

        Pete, Curt (i think), and Myself brought up a point, you debunked it, now were all the wiser.

        Transmission lines sound great, and with this 20:1 taper that you have constructed and tested they should fit a bit better in a smaller box.

        Thanks for the info.

        KILLER

        > Dan Neubecker has posted (Sunday night) his
        > comments on listening to the RS265 woofers
        > in the 20:1 tapered TL (HOSS project) you
        > all said would have objectionable noise from
        > the terminus because its area was too small
        > and from the blocks inserted into the last
        > line segment to reduce the area. I'll let
        > Dan's comments speak for me.
        > Paul K.

        YO

        Comment


        • #5
          I suggest he brings them to Iowa for a test run... *NM*



          Comment


          • #6
            Re: It's all in the listening.


            You may have a point and there's always the possibility that one person may not hear port noise as well as another, or that it's not at all objectionable even if audible. As long as Dan likes what he got, that's the most important issue. Thanks for not (apparently) taking umbrage with the way I addressed Dan's most recent posting.
            Paul K.

            > I built my DPL-12 subwoofer using ports that
            > "supposedly" had air velocities
            > below the "objectionable" limits,
            > but when I tone-tested the sub, I could
            > localize it due to vent noise. During most
            > music or program material, I didn't notice
            > it. But when the signal was band limited to
            > the lowest octaves, as in the rumble of a
            > spaceship or aircraft carrier during movies,
            > I could hear the noise. So a PR was used
            > instead.

            > So if music was the end goal, I could have
            > stuck with the ported version since the
            > noise was masked pretty well by the rest of
            > the program material.

            > I'd be real curious to see how it does with
            > something more band-limited to the first
            > couple octaves.

            Comment


            • #7
              Re: Woah Woah Woah, guyyyys


              I really appreciate your response, Killer, and hope I haven't alienated you by the way I handled this. The more I learn about speakers, the more I realize I still don't know. Just to clarify, Dan Neubecker is the constructor; I just modeled the tapered TL for him and gave him ideas on how to implement it in his smallish and uniquely-shaped box.
              Paul K.

              > Your totally not full of yourself, Im
              > honestly glad you chimed in and let me know
              > that everything went alright. Now I have a
              > little more knowledge on transmission lines.

              > Im sure Pete has a point with limited
              > frequencies causing noise, but who knows.

              > I think everyone around this board needs to
              > take a more relaxed approach to things.
              > Unless ofcourse someone really pisses you
              > off, like that Rob guy, what ever happened
              > to him, I think I scared him off, no hard
              > feelings Rob if your reading this.

              > Pete, Curt (i think), and Myself brought up
              > a point, you debunked it, now were all the
              > wiser.

              > Transmission lines sound great, and with
              > this 20:1 taper that you have constructed
              > and tested they should fit a bit better in a
              > smaller box.

              > Thanks for the info.

              > KILLER

              Comment


              • #8
                Curt's Speaker Design Works

                "It is the mark of an educated mind to be able to entertain a thought without accepting it."
                - Aristotle

                Comment


                • #9

                  Comment


                  • #10
                    It's gotta be MadBoard Fever, migrated here


                    Two of my favorite folks in the hobby, Paul K and Curt C, in a bit of a dustup -- and under all previous circumstances two of the absolutely nicest folks you could ever want to know!

                    Can't be them, cuz, well, that's just not them.

                    Gotta be MadBoard Fever, migrated here now that the MadBoard has all but shuffled off its mortal coil . . .

                    Make up guys. I loves ya both!

                    Dan

                    I love it when a plan comes together.

                    Comment


                    • #11
                      Re: Curt and I are completely cool!


                      Dan: Read down further in the HOSS thread started by Dan Neubecker on his listening tests, and you'll see an exchange ("Don't be silly") between Curt and I that will calm your nerves.

                      Don't forget to keep me updated on your travel plans to this area in July. I'm really looking forward to your visit.
                      Paul

                      > Two of my favorite folks in the hobby, Paul
                      > K and Curt C, in a bit of a dustup -- and
                      > under all previous circumstances two of the
                      > absolutely nicest folks you could ever want
                      > to know!

                      > Can't be them, cuz, well, that's just not
                      > them.

                      > Gotta be MadBoard Fever, migrated here now
                      > that the MadBoard has all but shuffled off
                      > its mortal coil . . .

                      > Make up guys. I loves ya both!

                      > Dan

                      Comment


                      • #12
                        Re: Curt and I are completely cool!


                        > Don't forget to keep me updated on your
                        > travel plans to this area in July. I'm
                        > really looking forward to your visit.
                        > Paul

                        I plan to. Still about 6 weeks away and my wife has some family and Longaberger plans to finalize before I can figure out what my schedule will look like.

                        Glad all is cool with you and Curt.

                        Dan
                        I love it when a plan comes together.

                        Comment

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