Carbon_66 Posted January 27, 2010 Share Posted January 27, 2010 I have an extra pair of La Scalas that are pretty beat up. These are originally LSBR's that have been brushed with urethane and have numerous large chips and rounded corners. The plan is to laminate 1/4" MDF to all sides and the bass bin and then veneer. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 Some of the damage. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 U-Pol has an excellent line of fillers. Fibral is polyester based resin infused with glass fibers. High viscosity Dolphin glaze is a polyester based filler that is very thick. Dolphin glaze is a polyester based filler that "flows", very thin. These all use the same hardener. BPO. They can all be intermixed for different viscosities and properties. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 Fibral. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 Fibral sanded. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 Dlophin glaze. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 Done. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 I'm using Titebond 2 with a 1/8" notched trowell. 3oz on the bottom. 5/8" brads. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 X Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 I used 8oz of glue on each side and about 80 brads. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 After gluing all sides, I stacked and strapped them together. Sorry for the bad pic. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 The top and bottom were trimmed before the sides went on. I used a 1/2" flush trim bit with the bearing set to the center of the original 3/4. Remember, these cabinets were hand sanded, and the edges will have a slight taper, stay with the middle. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 The cabinets were sanded with 80 before the 1/4" MDF went on. Everything that will be veneered has been sanded to 180. I use air d/a's. They are infinately controllable and are far superior to on/off electric d/a's. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 The top, bottom, and sides are done. The top section has been sanded to 320, as it will be painted black. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 Time to work on the bass bin. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 The pieces for the bass bin have a 30 degree taper at the back. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 I ran the front wild with a 30 degree taper that will be sanded flush later. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 27, 2010 Author Share Posted January 27, 2010 I have about 25 hours into these so far. A lot of that is sanding off the old urethane. I should have the bass bins and fronts done tomorrow night. Materials: 2 4x8 sheets of 1/4" MDF $45 1 gallon of titebond $16 1000 5/8" brads $4 U-Pol is about $12-$18 per bag. I already had those. I can already say that the additional 1/4" has made a significant difference in the soliditiy of the cabinets. This is my first venture into this type of project and I'm really looking forward to the veneering portion. I have spent numerous hours perusing this forum and have to thank all of those who take the time to document their builds. I can appreciate the time it takes to put a thread together. Thanks. Greg Quote Link to comment Share on other sites More sharing options...
bliss53 Posted January 27, 2010 Share Posted January 27, 2010 Nice work. I really like the tire and strap clamp. Do you think the brads would supply enough clamping preasure on their own? I was thinking that the clamping after the brads would have a limited impact because the brads will also limit further compression of the glue joint? What do you think? I am watching your approach and waiting for a review how the result sounds. Have you considered a ported bass extention on the bottom? I think I will add a ported section in my upcoming lascala project. Quote Link to comment Share on other sites More sharing options...
JohnA Posted January 27, 2010 Share Posted January 27, 2010 I see it's too late. Adding material to the doghouse changes the expansion rate of the bass horn and surely changes its sound. Adding it to the outside of the bass horn can only help. Quote Link to comment Share on other sites More sharing options...
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