Industry standard indoor speakers with ABS enclosures and a powder coated steel grille. Wall or ceiling surface mounting via the adjustable steel bracket. Each with standard 8 Ohms impedance and supplied in pairs for connection from a stereo amplifier. Main drivers have high quality coated paper cones for full-sounding low and mid-range frequencies, ideal for music playback and clear voice announcements.Woofer[tab]130mmØ (5.25")[br]Tweeter[tab]25mmØ (1") balanced dome tweeter[br]Power rms[tab]45W[br]Power max.[tab]90W[br]Colour[tab]Black[br]Frequency response[tab]100Hz - 20kHz[br]Sensitivity[tab]88dB[br]Dimensions (each)[tab]180 x 240 x 180mm[br]Weight[tab]2.0kg[br]Weight per set[tab]4.0kg[br]Impedance[tab]8 ohm