is it just two different lengths of same pleat or is the pleat different ?
because the 200 is only 33% longer yet claims 50% higher power handling so i wonder if it may also be wider and / or deeper in the pleat.
they also seem to have slightly different frequency response in the specs, but that may be due to different measurement conditions etc.
and yet the higher power handling of TPL200 is consistent with it having slightly more rolled off top half an octave if that power handling is achieved by having deeper pleat. deeper pleat would mean more conductor surface area and perhaps more power handling as a result.
in other words you would expect a 4" compression driver to have slightly more rolled off top end than a 3" so maybe Beyma felt you would also expect the bigger AMT to be a bit more rolled off and made it not just longer but also ... different ?
i understand even with the same pleat they would sound different due to different radiation patterns but if you were to array them those differences would mostly cancel out ...
so is it the same pleat or not ?
because the 200 is only 33% longer yet claims 50% higher power handling so i wonder if it may also be wider and / or deeper in the pleat.
they also seem to have slightly different frequency response in the specs, but that may be due to different measurement conditions etc.
and yet the higher power handling of TPL200 is consistent with it having slightly more rolled off top half an octave if that power handling is achieved by having deeper pleat. deeper pleat would mean more conductor surface area and perhaps more power handling as a result.
in other words you would expect a 4" compression driver to have slightly more rolled off top end than a 3" so maybe Beyma felt you would also expect the bigger AMT to be a bit more rolled off and made it not just longer but also ... different ?
i understand even with the same pleat they would sound different due to different radiation patterns but if you were to array them those differences would mostly cancel out ...
so is it the same pleat or not ?
ok i am officially an idiot.
i just assumed TPL200 was 200mm long and TPL150 was 150mm long but they're both 160mm long and in fact same face plate dimensions.
but the TPL200 is 4 mm deeper, and i assume they have the same chamber so the extra 4 mm comes entirely from the motor thickness enabling higher output at expense of narrower bandwidth ( both at low and top end ).
so the TPL150 is basically a studio version and TPL200 is the prosound version and costs more because it has bigger magnets.
i just assumed TPL200 was 200mm long and TPL150 was 150mm long but they're both 160mm long and in fact same face plate dimensions.
but the TPL200 is 4 mm deeper, and i assume they have the same chamber so the extra 4 mm comes entirely from the motor thickness enabling higher output at expense of narrower bandwidth ( both at low and top end ).
so the TPL150 is basically a studio version and TPL200 is the prosound version and costs more because it has bigger magnets.