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We'll need the marketing guys to come up with a suitable name for this one. I'm not sure "Saint-Saëns Technodanvan Edition" rolls off the tongue any better, so we're stuck with this for now. At least it's descriptive, if one were following JonMarsh in the original thread. In any case, I have begun the initial work on a set of SMJ-40s that feature only those parts available from Parts Express. So to be clear, here's what I'm using:
2x GRS PT2522C-4 3-1/2" Planar Tweeter with Back Cup plus face plate, MODified by Jon with an extended back cup (I state MOD X as I might try several before settling on one)
2x GRS PT5010-8 10" Planar Mid/Tweeter plus face plate
8x Dayton Audio RSS210HF-4 8" Reference Series Subwoofers
8x Dayton Audio RSS265-PR 10" Reference Series Aluminum Cone Passive Radiator
Jon has discussed the MOD variants of the PT2522C in his thread so I won't go into that. The main difference here is the use of Dayton Audio passive radiators in place of the Seas SL26R. I did this for a few reasons, but the two that stand out are price and appearance. The Seas likely has better linear performance that the Dayton, however I think the audible difference will be small (at least to my ears).
Cabinet construction will likewise be of more common materials in an aim to keep costs lower. The baffles will be 3x18mm Baltic Birch plywood, with all sides being a laminate of 18mm Baltic Birch and 1/2" MDF. I will probably mirror Jon's efforts with the phenolic plates and such as that seems integral to the design. The entire visible exterior will be Baltic Birch, so I'm thinking I might just go simple and clearcoat the whole thing...perhaps with a few hardwood inlays here and there if I have time. We shall see.
As I often do, I have enlisted one Steve Manning to assist me with the baffles. We're doing something a little different than Jon did, and it's going to require a CNC (and skills) I do not have.
Finally, in addition to the Crescendos I'm working on side by side with this, I'm hoping to take these with me to IowaDIY this year - that is, if Jon isn't going himself! In addition to praying I have enough time to finish everything, this also assumes I have enough room in my van to safely transport two sets of enormous speakers ~3,000 miles round trip.
2x GRS PT2522C-4 3-1/2" Planar Tweeter with Back Cup plus face plate, MODified by Jon with an extended back cup (I state MOD X as I might try several before settling on one)
2x GRS PT5010-8 10" Planar Mid/Tweeter plus face plate
8x Dayton Audio RSS210HF-4 8" Reference Series Subwoofers
8x Dayton Audio RSS265-PR 10" Reference Series Aluminum Cone Passive Radiator
Jon has discussed the MOD variants of the PT2522C in his thread so I won't go into that. The main difference here is the use of Dayton Audio passive radiators in place of the Seas SL26R. I did this for a few reasons, but the two that stand out are price and appearance. The Seas likely has better linear performance that the Dayton, however I think the audible difference will be small (at least to my ears).
Cabinet construction will likewise be of more common materials in an aim to keep costs lower. The baffles will be 3x18mm Baltic Birch plywood, with all sides being a laminate of 18mm Baltic Birch and 1/2" MDF. I will probably mirror Jon's efforts with the phenolic plates and such as that seems integral to the design. The entire visible exterior will be Baltic Birch, so I'm thinking I might just go simple and clearcoat the whole thing...perhaps with a few hardwood inlays here and there if I have time. We shall see.
As I often do, I have enlisted one Steve Manning to assist me with the baffles. We're doing something a little different than Jon did, and it's going to require a CNC (and skills) I do not have.
Finally, in addition to the Crescendos I'm working on side by side with this, I'm hoping to take these with me to IowaDIY this year - that is, if Jon isn't going himself! In addition to praying I have enough time to finish everything, this also assumes I have enough room in my van to safely transport two sets of enormous speakers ~3,000 miles round trip.
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