... coaxial speaker, mainly used in venues such as Karaoke rooms with large SPL Features: TK series loudspeaker is driven by a ... coaxial speaker, mainly used in venues such as Karaoke rooms with large SPL, live performance, conference rooms, multi-functional hall and ... the same axis, so that treble and bass sound synchronously, with no time difference, clear voice, high fidelity, accurate middle and high ...