Comments on "An analysis of design conditions for a phase-inverter speaker system with a drone cone"

The last sentence on p. 405 in the above paper states: "This paper ... shows that the low-frequency response of the drone-cone system is a little inferior to that of the bass-reflex system, ... ." The exposition of this correspondence shows that a properly designed drone cone for a phase-inverter loudspeaker will provide performance superior to that of the same loudspeaker with a port.