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  • #31
    Originally posted by lunchmoney View Post
    WOW. Nice work.

    Question: if going through all the trouble to make such amazing cabinets, why such a simple TM configuration? Wouldn't they be worth a nice 2.5-way or 3-way? I can't imagine two more drivers would break the bank on these.
    Thank you Sir!

    Ah, I might not have mentioned it, but there is a Tang Band W51138 5.25" subwoofer going in the bottom of these. These are similar to the Summer Winds speaker system from a few years back with a Dayton 5/8" tweeter, two ND65s and a 5.25" peerless subwoofer at the bottom.

    So these will be three way speakers, or at least two ways with built in subs... a "Souped up" version of those. I know only a few folks have heard the Bantam speakers the upper portion of this pair is based on, but they are really a sweet sounding little speaker, my favorite I've built actually.

    But yeah, I get what you mean, and I've for sure thought about it... a semi- exotic small midwoofer and fancy tweeter would be cool for this... and how about the new epique subwoofer for the underside thumping about? These could be made into a rather high end system with total full range performance... Hey, I have one more pair of these cabinets in the basement in-the-raw waiting to be finished! I'm not done yet!

    TomZ
    Zarbo Audio Projects Youtube Channel: https://www.youtube.com/channel/UCEZ...aFQSTl6NdOwgxQ * 320-641 Amp Review Youtube: https://youtu.be/ugjfcI5p6m0 *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
    *Part 2 *Gluing multiple curved laminations of HDF

    Comment


    • #32
      Originally posted by tomzarbo View Post

      Thank you Sir!

      Ah, I might not have mentioned it, but there is a Tang Band W51138 5.25" subwoofer going in the bottom of these. These are similar to the Summer Winds speaker system from a few years back with a Dayton 5/8" tweeter, two ND65s and a 5.25" peerless subwoofer at the bottom.

      So these will be three way speakers, or at least two ways with built in subs... a "Souped up" version of those. I know only a few folks have heard the Bantam speakers the upper portion of this pair is based on, but they are really a sweet sounding little speaker, my favorite I've built actually.

      But yeah, I get what you mean, and I've for sure thought about it... a semi- exotic small midwoofer and fancy tweeter would be cool for this... and how about the new epique subwoofer for the underside thumping about? These could be made into a rather high end system with total full range performance... Hey, I have one more pair of these cabinets in the basement in-the-raw waiting to be finished! I'm not done yet!

      TomZ
      Yes a true dedicated midrange is along the lines of what I meant.... ya know, my sense of scale was off with these, I thought they were physically larger... not that much room for the sort of 3-way or 2.5-way I was imagining.... although something like the Overnight Sensation TMM's come to mind...

      Relevant side story: I recently built 3-way's using an isodynamic tweeter and a dedicated mid-range, and they've absolutely floored me (a design a shan't promote on PE).... They blow away any 2-ways I've ever built, including my rather-perfectionist and more expensive SR-71's.... I just sit there for hours slack-jawed-drooling to 50's jazz recordings, wondering where 3-ways have been all my life.

      Since then, I can't help wondering why 3-ways aren't more often done, given the real estate and budget.... surely you have the spare drivers kicking around, no?

      I love that little sub by the way.... years ago I built a small vented sub with that I'm still using in my home office. Very impressive in a small space, although I find it falls off quite dramatically if used in a larger room.
      Form does not follow function
      Form is simultaneous to function

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      • #33
        Quick pic of previous cabinet for size comparison...

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        TomZ
        Zarbo Audio Projects Youtube Channel: https://www.youtube.com/channel/UCEZ...aFQSTl6NdOwgxQ * 320-641 Amp Review Youtube: https://youtu.be/ugjfcI5p6m0 *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
        *Part 2 *Gluing multiple curved laminations of HDF

        Comment


        • #34
          (Tom IS eight feet tall though ... ;-) )

          Wow Tom, you're lookin' pretty trim.
          Didn't you put on any COVID pounds, like I did?

          Comment


          • #35
            This pic is from a few years ago, but I'm not too much thicker... Once we went on quarantine last March, I picked up the pace on the running in a preemptive strike to try and combat any unsightly weight gain.

            TomZ
            Zarbo Audio Projects Youtube Channel: https://www.youtube.com/channel/UCEZ...aFQSTl6NdOwgxQ * 320-641 Amp Review Youtube: https://youtu.be/ugjfcI5p6m0 *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
            *Part 2 *Gluing multiple curved laminations of HDF

            Comment


            • #36
              Looking fantastic Tom! I'm not sure I would have the patience for such an exotic shape but the results are killer.

              Originally posted by lunchmoney View Post

              Relevant side story: I recently built 3-way's using an isodynamic tweeter and a dedicated mid-range, and they've absolutely floored me (a design a shan't promote on PE).... They blow away any 2-ways I've ever built, including my rather-perfectionist and more expensive SR-71's.... I just sit there for hours slack-jawed-drooling to 50's jazz recordings, wondering where 3-ways have been all my life.

              Since then, I can't help wondering why 3-ways aren't more often done, given the real estate and budget.... surely you have the spare drivers kicking around, no?
              Agreed. While there are many fantastic examples of 2-way designs, it is a rare case that they can hold up against a similar 3-way design. Freeing up the midrange to just be a midrange really changes the game. Of course the hurdles are: Size, Cost, and Complexity. Making a mid mesh well with both the woofer and the tweeter is truly an art.

              Comment


              • #37
                Getting to work on the feet...

                this is a slab of 2" thick oak I had in my stash.

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                I put my band saw to the test, but got it done.

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                They still need to be sanded/shaped up a bit, and I intend to put a 1/4" roundover on the feet where they show, but pretty much this is what they will look like.

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                There will be a rubber bumper at the bottom of each foot that is about 3/4" thick or so instead of spikes. Those are from an old plastic outrigger set PE sold as a buyout years ago.

                I think these will get painted with black, and then clear lacquer.

                Oh, and thanks Dukk. I'm working so slow these days, the patience part is taking care of itself.

                TomZ
                Zarbo Audio Projects Youtube Channel: https://www.youtube.com/channel/UCEZ...aFQSTl6NdOwgxQ * 320-641 Amp Review Youtube: https://youtu.be/ugjfcI5p6m0 *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
                *Part 2 *Gluing multiple curved laminations of HDF

                Comment


                • #38
                  Tom can you say how you applied the veneer, what glue you used etc?

                  Comment


                  • #39
                    Originally posted by skatz View Post
                    Tom can you say how you applied the veneer, what glue you used etc?
                    Skatz,

                    I usually veneer in this order, Back, sides, front, top. I had the grain on the top going left to right to make it look like a continuation of the sides going over the top. It's hard to tell with Bubinga, it's grain is all over the place, but you can see the grain if you look for it.

                    I leave an inch or so extra around all the edges so I can use blue painters tape to hold the veneer down while I'm applying the glue with the roller. I pour some glue in a plastic Dixie plate and pick up the glue on the roller that way. Next day you can peel off the glue to clean it up.

                    I just used the same old Heatlock iron-on veneer glue I always use. I tried to keep it from touching with wood dowels where the convex curves are. It doesn't stick firm like contact cement, but it can stay 'tacky' in places so it's good to keep iron on the lowest, or flat parts first before letting the rising areas touch. (speaking of the sides and bottom of the front in this case)

                    There are a few links in my signature for videos on how I usually do this process. It's super easy though.... Apply glue with a roller to both veneer and cabinet... wait a half hour until the glue is mostly not really tacky anymore (a few places it may be tacky, but mostly it's not)... apply veneer to cabinet... place cotton buffer cloth on top of veneer and iron center-out at a medium to medium-high setting. I go over things a few times and move the iron slow, but it really works super-well. Some folks have success with regular Titebond glue, but I've always used this special Heatlock glue since it's specially formulated for this process, it's a bit thicker I think and it doesn't splatter any when applying it to cabinet or veneer.

                    This Bubinga was paper-backed by the way, it's much easier to work that way.

                    Sometimes depending on how the veneer absorbs the glue and dries out with the iron, the veneer may curl up a bit... I've actually had it try to pull away from the cabinet a bit at the corners usually due to this. I may use a little painters tape to keep the veneer from curling up, you may have seen that in a few pics here and there, that's what that's for. When you iron the veneer and get the glue surfaces really hot, it softens things up for a minute and it takes a bit for things to cool down and firm up. During that time if the veneer curls, it can lift up.

                    Hope some of that made sense.

                    TomZ
                    Zarbo Audio Projects Youtube Channel: https://www.youtube.com/channel/UCEZ...aFQSTl6NdOwgxQ * 320-641 Amp Review Youtube: https://youtu.be/ugjfcI5p6m0 *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
                    *Part 2 *Gluing multiple curved laminations of HDF

                    Comment


                    • #40
                      Perfectly clear, thanks. I will have to try the heatlock. I have not had good results ironing on aliphatic glues, and not with water soluble contact cements either. Best for me has been solvent based contact cement, seems that once its down, its down for good. I have had problems with the water based contact, like I used on my Solstice cabinets letting the veneer delaminate after a couple of years. I think its caused by humidity changes over the winter months, but that is speculation. You saw those speakers demo'd at an InDIYana meet, but Jeff was the one that discussed their design, I was a bystander. The veneer is now curled up at the bottom front of the cabinet, and on the sides at the bottom as well. Haven't been able to figure out how to try to fix that.

                      Comment


                      • #41
                        Oh, okay.

                        I'd know you if I saw you, but I'm so bad with names it's ridiculous, especially with screen names. Sorry, didn't mean to talk in such basic terms, you've obviously done this a few times, I didn't realize.

                        I'm perfectly afraid of contact cement to be honest, I'm so clutzy, and with curves, I can see me goofing that up pretty quick. I used water-based contact cement and it did loosen, but the edges are still in tact, so that's good.

                        I haven't actually had any of my iron-on projects fail, so as a bonding process it must be really good, and really easy. I would have had a few issues if it were critical to do it exactly as the instructions say. I think you'll like it, it has a hands-on process that seems kind of theraputic and calming. I have to get some more glue delivered soon, but it doesn't like the cold, so they ship with a heat bag in the pkg. during cold seasons.

                        TomZ
                        Zarbo Audio Projects Youtube Channel: https://www.youtube.com/channel/UCEZ...aFQSTl6NdOwgxQ * 320-641 Amp Review Youtube: https://youtu.be/ugjfcI5p6m0 *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
                        *Part 2 *Gluing multiple curved laminations of HDF

                        Comment


                        • #42
                          Just a bit of progress.

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                          Belt, disc, and spindle sanding needed to remove my less-than-perfect bandsawing skills.

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                          1/4" roundover on the sides that show. Drilled and tapped the holes for the rubber floor bumpers... The threads do hold fine in hardwood. This makes them slightly adjustable for my wobbly tile floor.

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                          Now I have to get some wood filler for a few tiny boo-boos before I can start sealing these.

                          More to come...

                          TomZ
                          Zarbo Audio Projects Youtube Channel: https://www.youtube.com/channel/UCEZ...aFQSTl6NdOwgxQ * 320-641 Amp Review Youtube: https://youtu.be/ugjfcI5p6m0 *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
                          *Part 2 *Gluing multiple curved laminations of HDF

                          Comment


                          • #43
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                            Zarbo Audio Projects Youtube Channel: https://www.youtube.com/channel/UCEZ...aFQSTl6NdOwgxQ * 320-641 Amp Review Youtube: https://youtu.be/ugjfcI5p6m0 *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
                            *Part 2 *Gluing multiple curved laminations of HDF

                            Comment


                            • #44
                              Did a little filling here and there over the past few days and today some final sanding...

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                              Applied a first coat of BLO and watched the magic happen!

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                              My plan is for a super-smooth and shiny finish. These will be sealed, grain-filled, and sealed several times... then probably left for a few months until it warms up a bit. I can spray clear lacquer out in my garage, but it's got to be warm enough, and it won't be until probably March or maybe even April or so.

                              So I may just work out the crossovers and such before applying the final lacquer clear coats. That's not how I usually do it, but it may be necessary this time. I'd like at least a good month or so of listening to shake these down before MWAF this year.

                              The two larger holes at the rear are for PE's Monster Binding Post speaker terminal by the way. These were a good choice because they are far enough apart to straddle the port, which is right next to the rear of the cabinet due to packaging constraints.

                              TomZ


                              Zarbo Audio Projects Youtube Channel: https://www.youtube.com/channel/UCEZ...aFQSTl6NdOwgxQ * 320-641 Amp Review Youtube: https://youtu.be/ugjfcI5p6m0 *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
                              *Part 2 *Gluing multiple curved laminations of HDF

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                              • #45
                                What do you fill the grain with?
                                Nice clock!

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