Floorstanding loudspeakers — Castle Knight 4

Thanks to TPT (Twin-Pipe Technology) technology, which represents a new generation of acoustic maze design, open to the bottom of the speaker, or, in other words, thanks to systems that generate a bass response inside the case through the use of a two–tube quarter-wave resonator, the creators achieved smooth and smooth bass, complementing the radiation of the main low-frequency driver with a clear and clear sound.