jwgorman Posted November 6, 2023 Share Posted November 6, 2023 In 2019 I had a local cabinet maker build me some Cornwall/Altec 19 inspired two ways from 3/4” baltic birch. He even used baltic birch for bracing and at my request, we ended up making the motorboard 1.5” thick (2.25” where the t-nuts for the woofer mount) for no good reason. These speakers have provided countless hours of crossover and driver experimentation. I have left them configured with 15PR400-4s and HF-146 on ZXPC horns. They are crossed at 700HZ and sound very balanced. I’m sure a digital active crossover would have been much easier to work out but clearly I like old school stuff. The crossover was by far the most frustrating part of working through this design and I don’t claim it’s perfect. They are very dynamic/efficient and more polite than my Cornwall IIs were but still posses a front and center presentation. Alas I think I am ready to move to a smaller box for continued scientific experiments. These are 23.5x24x43.5” and guessing they are roughly 150 pounds each! You can experiment to your heart’s content or leave them as they are. I am near Cedar Rapids Iowa. $2000 4 Quote Link to comment Share on other sites More sharing options...
rebos Posted November 6, 2023 Share Posted November 6, 2023 (edited) Beautiful cabinets!! Having just built a Cornwall clone I can appreciate the craftsmanship. I also like that the motor board is extra stout. I wish I had done similar, although not 2.25 inches!! You are leaving approximately $1400 in drivers in them. GLWS! Edited November 6, 2023 by rebos Added more text 1 Quote Link to comment Share on other sites More sharing options...
jwgorman Posted November 6, 2023 Author Share Posted November 6, 2023 31 minutes ago, rebos said: Beautiful cabinets!! Having just built a Cornwall clone I can appreciate the craftsmanship. I also like that the motor board is extra stout. I wish I had done similar, although not 2.25 inches!! You are leaving approximately $1400 in drivers in them. GLWS! Thanks. Yes, I have gotten a lot of enjoyment from them. Thanks for pointing out my 2.25” comment. The front of the motorboard is 1.5”, where the t-nuts mount for the woofer is 2.25”. I’ve edited that part. Quote Link to comment Share on other sites More sharing options...
Peter P. Posted November 6, 2023 Share Posted November 6, 2023 What will you replace them with? Quote Link to comment Share on other sites More sharing options...
jwgorman Posted November 7, 2023 Author Share Posted November 7, 2023 2 hours ago, Peter P. said: What will you replace them with? I think I am going to build a smaller box, built around a 12” that can go up to 1.5khz without a crazy resonance peak and the ESS AMT1 driver. Quote Link to comment Share on other sites More sharing options...
Horn Tube Posted November 8, 2023 Share Posted November 8, 2023 (edited) On 11/6/2023 at 9:49 PM, jwgorman said: In 2019 I had a local cabinet maker build me some Cornwall/Altec 19 inspired two ways from 3/4” baltic birch. He even used baltic birch for bracing and at my request, we ended up making the motorboard 1.5” thick (2.25” where the t-nuts for the woofer mount) for no good reason. These speakers have provided countless hours of crossover and driver experimentation. I have left them configured with 15PR400-4s and HF-146 on ZXPC horns. They are crossed at 700HZ and sound very balanced. I’m sure a digital active crossover would have been much easier to work out but clearly I like old school stuff. The crossover was by far the most frustrating part of working through this design and I don’t claim it’s perfect. They are very dynamic/efficient and more polite than my Cornwall IIs were but still posses a front and center presentation. Alas I think I am ready to move to a smaller box for continued scientific experiments. These are 23.5x24x43.5” and guessing they are roughly 150 pounds each! You can experiment to your heart’s content or leave them as they are. I am near Cedar Rapids Iowa. $2000 That corner joint look awesome. To work with that router bit, a table router is needed right? Edited November 8, 2023 by Horn Tube Quote Link to comment Share on other sites More sharing options...
jwgorman Posted November 10, 2023 Author Share Posted November 10, 2023 Sorry man, I do not know. I paid a cabinet maker to make these. Quote Link to comment Share on other sites More sharing options...
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