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Rudolph,Wouldn't you agree that these baffle shapes are for use below say 200hz?
Wouldn't you also agree that nearfield measurements of an open alignment in the bass region are pretty much useless, because the rear wave delay distance is significant in comparison to the mic distance?
Where's your damping for the U, since a U-baffle doesn't perform properly without addressing the lumped mass behavior of the air in the cavity?
Don't get me wrong, I applaud the effort and sharing. I just question the test conditions.John
Rudolf,Could you make an I-frame with the woofer placed close to the floor @18"w x 24"h ( @45cm x 61cm? ) to measure for comparison to the H-frame?
@ all else: I don´t intend to make it a habit building and measuring baffles for individual members of this fine forum. So please refrain from asking what else chipbord sizes I have in my basement.
How about measuring the same baffle at a few different distances?John
My thinking was 45cm wide (I just threw out a # on height ) because a few OB'ers feel that @45cm (17" to 18" for us odd balls) is a good compromise between bass rolloff and imaging.
Do I steer the whole thing wrong by asking what you think sounds the best? I would be interested in that.
Lin,No estimation but the simulation of my A&D 1524 on a 45 x 60 cm baffle looks like this (Bass-center 25 cm above floor):
Rudolf, - After you test Lins baffle with the driver on the bottom would you flip it "upside down", and see what it does with the driver on top?Thank you!BobEDIT: And move the mic vertically to correspond to the center height of the driver too please.
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