I have been making some progress on my first speaker building project for over a decade. I want to "downsize" from the Basszilla and horn setups I have been using, and although I recently have been listening to my old Aria 5R speakers, subwoofers + active crossover, wanted to have a full range speaker to live with in my room. I had been researching various designs from Troel Gravenson and others, looking to get a an efficiency at or above 90dB/1Wm. I ran across a well documented and very well regarded design by Joe Rasmussen in Australia (former colleague of the late Allen Wright). His design is a 2-1/2" way using four (4) 6-1/2" drivers and a 1" dome tweeter mounted in a waveguide.
http://www.customanalogue.com/elsinore/ ... _index.htmThere is a very long project thread (254 page and counting) on DIYAudio.com
https://www.diyaudio.com/forums/multi-w ... hread.htmlI have been working on the cabinets over the past couple of weeks, and have been making progress on cutting all the panels and routing out the holes. Having fun with my new Bosch 1/2" router (with fixed & plunge bases), as you can see in the attached. Had to make a template for the rectangular holes in the braces and used a Jasper Jig for the circular cuts. Hope to start assembling the cabinets in the next week or so.
Making the cabinets out of MDF, double layer 1/2" to get the 1" recommended thickness. I ended up making a very stiff torsion box press (i.e. veneer press) for gluing up 2'x4' sheets together maintaining a constant pressure across the entire surface. Based on my cuts, the glueline is tight throughout the entire panel, so successful effort. Actually, I am finding that making tooling to facilitate accurate cutting, routing, and clamping is taking about the almost as much time as working on the speakers. I have made, in addition to the press, an accurate crosscut sled and adjustable router template for the rectangular holes in the braces, as well as tuning up my Bosch contractor's saw.
David