Fyne F1-10

https://www.fyneaudio.com/f1-10/

The F1-10 employs a downwards firing port system using twin cavity reflex loading. This loading technique broadens the tuning frequency to reduce cone excursion and acts as a muffler, blocking standing waves produced by the main internal port.
Below the vent in the base of the loudspeaker, the BassTrax ™ Tractrix profile diffuser (patent applied for) is used to convert the plain wave energy to an expanding spherical 360-degree wavefront, integrating energy uniformly into the room. This makes the loudspeaker less critical of
room positioning.
This Tractrix profile has been previously applied to horn loudspeakers by Voight in the 1920’s, but the application to a diffuser of this type is thought to be novel. The BassTrax ™ Tractrix profile is known to maintain a 90 degree angle at each intersection of the expanding wavefront, thus avoiding reflections.

嗯...這結論不知是何道理...