AVS Forum Addicted Member
Join Date: Oct 2003
Mentioned: 411 Post(s)
Tagged: 1 Thread(s)
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"Did you not read the big JBL research paper on port performance? Flaring does show some advantages in lowering air noise and allowing higher airspeeds (higher output) before the core slug of air goes fully turbulent."
yes. no question about the benefits of flaring.
i was asking about the 90 and 180 degree bends inside the cabinet and what, if any, effect they have on the port functionality.
i've become suspect of the 'common wisdom' that roundovers and smooth bends are necessary inside of an enclosure for a slot ported enclosure because the measured response for a horn with a lot of folds measures quite close to the model in hornresp which has no folds. if air was getting turbulent and making noise, then the impedance and frequency response would move around significantly and folks would complain their their horns are making internal chuffing sounds. not having to worry about 90 degree bends makes slot ported designs much easier to build.
jim, thanks for dropping in and i like how you were right up front about your affiliation. the new s series sounds *very* interesting...15mm linear, 38mm xmech, underhung... is the 500w rating sine waves, aes pink noise, or something more like a rough suggestion for amplifier matching?
since it will eventually be asked, do you have a klippel or dumax type report?