The Cielo speakers are specially tuned for use with the Basalte Asano multiroom system. The Cielo built-in speakers are available in 3 versions: 5.25 "for small rooms, 6.5" for average rooms and 8 "for larger rooms. The 5.25 ”and 6.5” are often used in combination with the Asano M4 multiroom amplifier. The 8 ”version is better suited for use with the P1 and P4A multiroom amplifier. All speakers are equipped with a Kevlar woofer and alu dome tweeter. The speakers can be built into suspended (system) ceilings, but certainly also into concrete ceilings when using a built-in (spot) box. (not included) All Cielo speakers come standard with a round and square white front grill, so that the design fits seamlessly with any interior.