Announcement

Collapse
No announcement yet.

on Sale - $55/pr (drivers & XO)

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

  • #91
    Re: on Sale - $55/pr (drivers & XO)

    Originally posted by blue934 View Post
    has anyone had any issues with xmax on these? quickly modeling them in bassbox with 10w, they didn't seem to like anything below 200hz.?

    david
    You should read some of initial posts in this thread.

    The deal is that these are underhung voice coils. The gap is huge. The Xmax might be +/- 4mm, but the Xlim (mechanical limit - where you hear the "pop" of the voice coil bottoming out) is +/- 10mm.

    I've tuned the box to 40 Hz, and (unlike MOST small woofers) these guys push 40 Hz at full rated Pe with UNDER 4mm of throw (since that's the Fb), with the max excursion just over 7mm near 60 Hz (and again - climbing, in the mid 30's). When I put the parms for all these little ND woofers into WinISD, I use 6mm for Xmax (instead of 4), and then I let the excusion climb to 8mm for a worst case scenario. I think these can take almost all their rated power down into the 30's before you hear them bang. They can take a lot more abuse than the 6.5" and 8" Dayton Classics which "bang" quite readily in vented cabs.

    Using WinISD and MY measured T/S parms, 10w takes these to 4mm at 70Hz.
    At 6mm, they can take 20w down into the mid 30's, and 30w takes them to 8mm in the mid 30's. While I can't recommend these as replacements for an HT subwoofer, they DO play any notes of musical interest at moderate levels in your average livingroom. At Grinnell (IOWA DIY) they played in a 400 seat theater and really weren't too bad in there.

    Chris

    Comment


    • #92
      Go

      thanks chris,
      i see your other post about bad data. i just applied the ts params from the website into bassbox so that might be part of my problem.

      david
      ________
      INFANT NEXIUM
      Last edited by blue934; 04-11-2011, 06:57 AM.

      Comment


      • #93
        Re: on Sale - $55/pr (drivers & XO)

        do you have a parts express BOM for this project?

        Comment


        • #94
          Re: on Sale - $55/pr (drivers & XO)

          There's one on the first post of this thread.
          Mike
          "We're speaker geeks, not speaker nerds. Nerds make money!" Marty H
          Bismarck, North Dakota
          My Current System: HiFiMe DIY T3 Amp, Kenwood Basic C1 Preamp, and Paul Carmody Sunflowers
          My Garage System TPS3116D2 Amp, DIY PS 95 Speakers, DC 130 Sub

          Comment


          • #95
            Re: on Sale - $55/pr (drivers & XO)

            Originally posted by carlton View Post
            do you have a parts express BOM for this project?
            A BOM that gives part numbers for the revised flatter crossover and MTM version would also be really helpful, if it's available.

            Comment


            • #96
              Re: on Sale - $55/pr (drivers & XO)

              Originally posted by cowtown View Post
              A BOM that gives part numbers for the revised flatter crossover and MTM version would also be really helpful, if it's available.
              Here you go. 0.56 cf is perfect for my "ntn"s. Search my Nano Neos thread for more info.

              http://techtalk.parts-express.com/al...pictureid=3276

              Chris

              tweeters - 275-030
              woofers - 290-212

              Nano Neos:
              HP: 2 x 255-026
              2 x 027-419
              2 x 015-4
              2 x 015-3

              LP: 2 x 255-242
              2 x 027-328
              2 x 015-10
              2 x 027-340

              "ntn"s:
              HP: 2 x 255-026 (same as Nano Neos)
              2 x 027-423
              2 x 015-4 (same as Nano Neos)
              2 x 016-2.2

              LP: 2 x 266-554 (I-cores) backordered until mid January
              2 x 027-324
              2 x 016-20
              2 x 027-336

              Comment


              • #97
                Re: on Sale - $55/pr (drivers & XO)

                I'm finishing up a pair of these and have a question. I think I know, but I want to make sure. The positive side of the speaker wire goes to the 4uF cap and the .44mH coil (these are tied together) and the negative side goes to what is pictured as ground/common in Chris's drawing of the schematic; is that correct?
                Thanks,
                Mike
                "We're speaker geeks, not speaker nerds. Nerds make money!" Marty H
                Bismarck, North Dakota
                My Current System: HiFiMe DIY T3 Amp, Kenwood Basic C1 Preamp, and Paul Carmody Sunflowers
                My Garage System TPS3116D2 Amp, DIY PS 95 Speakers, DC 130 Sub

                Comment


                • #98
                  Re: on Sale - $55/pr (drivers & XO)

                  Originally posted by mikejennens View Post
                  I'm finishing up a pair of these and have a question. I think I know, but I want to make sure. The positive side of the speaker wire goes to the 4uF cap and the .44mH coil (these are tied together) and the negative side goes to what is pictured as ground/common in Chris's drawing of the schematic; is that correct?
                  You're looking at the schematic diagram Chris posted in the first message in this thread? Yes, you're correct.

                  Comment


                  • #99
                    Re: on Sale - $55/pr (drivers & XO)

                    Originally posted by Herman Trivilino View Post
                    You're looking at the schematic diagram Chris posted in the first message in this thread? Yes, you're correct.
                    Yes, the one in the first post. Thanks.
                    Mike
                    "We're speaker geeks, not speaker nerds. Nerds make money!" Marty H
                    Bismarck, North Dakota
                    My Current System: HiFiMe DIY T3 Amp, Kenwood Basic C1 Preamp, and Paul Carmody Sunflowers
                    My Garage System TPS3116D2 Amp, DIY PS 95 Speakers, DC 130 Sub

                    Comment


                    • Re: on Sale - $55/pr (drivers & XO)

                      New guy here. I must say this is an awesome sounding project Chris. I'd like to attempt it. I bought a couple of Dayton ND20FB-4 tweeters on sale $5 each: http://www.parts-express.com/pe/show...number=275-035
                      Do you think I can substitute these in for Dayton ND20FA-6 using current xo design for this project?

                      Comment


                      • Re: on Sale - $55/pr (drivers & XO)

                        How suitable do you think the Dayton silkie would be for a modded ntn?

                        Just wondering.. the truncated/shielded silkie is priced right now only a couple dollars more than the ND20.

                        Comment


                        • Re: on Sale - $55/pr (drivers & XO)

                          Originally posted by 50 watt head View Post
                          How suitable do you think the Dayton silkie would be for a modded ntn?

                          Just wondering.. the truncated/shielded silkie is priced right now only a couple dollars more than the ND20.
                          Why pay $2 more?
                          Kind of a waste to cross the Silky up at 4k.
                          Not sure a larger diameter tweeter can cross up at 4k keeping the C-C distance under 3.4".

                          Why not just design a new XO crossing a kHz or two lower?

                          Comment


                          • Re: on Sale - $55/pr (drivers & XO)

                            Originally posted by Cali-Fonz View Post
                            New guy here. I must say this is an awesome sounding project Chris. I'd like to attempt it. I bought a couple of Dayton ND20FB-4 tweeters on sale $5 each: http://www.parts-express.com/pe/show...number=275-035
                            Do you think I can substitute these in for Dayton ND20FA-6 using current xo design for this project?

                            Well, they're 4 ohms, not 6, and they'll be 2 dB louder.

                            Comment


                            • Re: on Sale - $55/pr (drivers & XO)

                              Thinking of something that I can use around my desktop PC for music and these are definitely great for the price as well as the extended bass response...but they do appear to be very low efficiency speakers. How many watts would I realistically need to drive these for near-field listening? I was thinking of putting together a small desktop system with a t-amp or something using one of the tripath chips likely to be 20wpc or less...but not sure that would work for these nano neos...thoughts?

                              Comment


                              • Re: on Sale - $55/pr (drivers & XO)

                                Originally posted by kcburnes View Post
                                Thinking of something that I can use around my desktop PC for music and these are definitely great for the price as well as the extended bass response...but they do appear to be very low efficiency speakers. How many watts would I realistically need to drive these for near-field listening? I was thinking of putting together a small desktop system with a t-amp or something using one of the tripath chips likely to be 20wpc or less...but not sure that would work for these nano neos...thoughts?
                                I was driving mine with a bookshelf stereo receiver, I'd be surprised if it was more than 15 watts, the speakers sounded good enough for typical listening, but didn't have enough power to play very loud. Now I have them hooked up to a 40 watt per channel receiver and they play as loud as I need them to and then some. I don't typically listen to really loud music, in the room they're setup in I'm usually sitting about 6 feet from the speakers in a room 10x12ish. The speakers are not incredibly efficient, but they do a good job at reproducing low notes without having to be really cranked up.

                                Comment

                                Working...
                                X