Invidiosulus 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. It's probably no more change in expansion than the braces people put in between the dog house and the sides. Quote Link to comment Share on other sites More sharing options...
Guest David H Posted January 27, 2010 Share Posted January 27, 2010 The top section has been sanded to 320, as it will be painted black. Nice work, are you going piano gloss black? I see you are veneering as well, cant wait to see the finished product. Quote Link to comment Share on other sites More sharing options...
dollar bill Posted January 27, 2010 Share Posted January 27, 2010 Great thread! Both budget and choices are keeping ,from finishing the split LSI's, but if I go with your method, at least I have step by step instructions now! Of course, I will use ply not MDF, but that's just me. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 28, 2010 Author Share Posted January 28, 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. Thanks. I think the brads do a pretty good job on their own. I use more glue than necessary, but I want intimate contact between the 1/4" and the original cabinet. The table saw is dead flat and I spread the load with multiple layers of mdf. I did get a little more squeeze out of glue, but not much. I'm actually looking at doing the ported extension. If I go that direction, I will probably do it through the top with a slot or 2 triangles. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 28, 2010 Author Share Posted January 28, 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. I'm already one step ahead of you. I have made all necessary calculations and have concluded that a 16oz can of pork and beans have the exact same volume as I have added. I will hot glue this into the bass bin. Thanks for lookin' out. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 28, 2010 Author Share Posted January 28, 2010 The top section has been sanded to 320, as it will be painted black. Nice work, are you going piano gloss black? I see you are veneering as well, cant wait to see the finished product. Semi gloss or flat. This area is going to have a grill. The reason I went 320 there is because it would be harder to sand this area later. I have one 4x10 sheet of mahogany that I bought for my Cornscala build that will be used for these and another on the way. I can't wait until the veneering but I have to finish both cabinets before I start. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 28, 2010 Author Share Posted January 28, 2010 Great thread! Both budget and choices are keeping ,from finishing the split LSI's, but if I go with your method, at least I have step by step instructions now! Of course, I will use ply not MDF, but that's just me. Thanks, I think build threads are great. My original intention was to go with ply. I have an excellent source of materials. (Southern lumber in San Jose). The 1/4" birch ply was 3/16" with two 1/32" layers of birch on the outside, and not the best quality. They have Finish ply which is 1/16" layers laminated together but that would have been over $250 for 2 sheets plus the 1/2" I needed for the front. This project requires a lot of sanding on the edges. The end grain of plywood sands at a slower rate than the face. It would be much more difficult getting a perfect 90 with the ply. Mdf sands almost the same in both directions, has no voids, is denser, and cheaper. If I was building a cabinet from scratch, I would go with the Finish ply, no question. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 28, 2010 Author Share Posted January 28, 2010 Second bass bin piece installed and sanded. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 28, 2010 Author Share Posted January 28, 2010 x Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 28, 2010 Author Share Posted January 28, 2010 I taped off the top section for 2 reasons. This will keep the glue off of the prepped area and will also serve as a guide as to where the front pieces land. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 28, 2010 Author Share Posted January 28, 2010 I used 1/2" mdf for the front. All pieces were ripped at 1 1/32" for a slight overlap. 3/4" brads and a 2x4 sheet from Home Depot. Don't place the brads too close together as this will cause a wedge and can split the plywood. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 28, 2010 Author Share Posted January 28, 2010 Top. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted January 28, 2010 Author Share Posted January 28, 2010 The 1/2" front brings the point of the bass bin within 1/16" of stock. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted February 3, 2010 Author Share Posted February 3, 2010 I use a "guide coat" on all edges. This is just a light spray of flat black rattlecan. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted February 3, 2010 Author Share Posted February 3, 2010 The guide coat shows everything. Highs, lows, and if you're keeping your block flat. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted February 3, 2010 Author Share Posted February 3, 2010 Most of the sanding at this point is done by hand. I make sanding blocks out of 1/2" mdf with 80, 120,180. and 320. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted February 3, 2010 Author Share Posted February 3, 2010 This the long block I made to face the front and finish all edges. 180 Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted February 3, 2010 Author Share Posted February 3, 2010 I'm using 8x5mm magnets to hold the grill in place. 21/64" bit. Quote Link to comment Share on other sites More sharing options...
Carbon_66 Posted February 3, 2010 Author Share Posted February 3, 2010 Magnet. Quote Link to comment Share on other sites More sharing options...
kg4guy Posted February 3, 2010 Share Posted February 3, 2010 Greg this is a awesome creative job man these are going to be some of the best I have seen yet . Congratulations I like to see these posts . Quote Link to comment Share on other sites More sharing options...
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