High air velocities in a Karlson 12 distributed slit vent exhausts candle

[CherylJosie]

The change in pitch has nothing to do with the cabinet or the port configuration. It is an artifact of human hearing.

[CherylJosie]

"Standing up and listening above the cabinet, the tone is weakened (and possessing harmonics) and about 1 note lower on a scale than getting closer to the floor."

Subjectively the human auditory cortex is known to perceive any frequency at a higher pitch when the sound pressure level increases. Just listen to anything at 100dB and then cut the level to 40dB and you will instantly perceive that the pitch drops a semitone along with the amplitude drop even though there is no change in frequency.

[radcam69]

what kind of driver is that?

[gnativerson]

@radcam69 -that was the Pyle/Eminence PYM1298 listed as having a 95oz magnet slug - I'd assume the new Kappa 12A is pretty close. That coupler with PYM1298 and a slotted Karlson waveguide on top had better drum transients than my fake La Scala set ( Peavey FH1/ Altec 511-K55V and APT150)