Might the "RJ" speaker w. diffraction slot be of interest to Karlson(atpr) Fans?
just wondering. A question for XRK971 - does the RJ offer any potential for "cone control" vs a direct radiator and if so must the exit slot be smaller in area than Sd ? I tried simming 12LTA in the M151 box below and it indicated a lot of peaking. In practice I don't think that will happen in a vintage RJ12 = but would have to verify.
Here's a plot of 12LTA in a slimline RJ enclosure - that box had the same volume as the more cubical models for 15" That 12LTA was was in bad shape where it had been dropped and could hear the voice coil rattling so the result may not be valid, It probably would measure a bit better with a good unit.
Here's my slimline RJ cabinet
just wondering. A question for XRK971 - does the RJ offer any potential for "cone control" vs a direct radiator and if so must the exit slot be smaller in area than Sd ? I tried simming 12LTA in the M151 box below and it indicated a lot of peaking. In practice I don't think that will happen in a vintage RJ12 = but would have to verify.

Here's a plot of 12LTA in a slimline RJ enclosure - that box had the same volume as the more cubical models for 15" That 12LTA was was in bad shape where it had been dropped and could hear the voice coil rattling so the result may not be valid, It probably would measure a bit better with a good unit.

Here's my slimline RJ cabinet

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