WS-0140W/B, DS-0115LW/LB, DS-0115DW/DB features: 1) Kinds of installation are provided together with different kinds of bracket to suit many locations. 2) WS-0140W/B: outdoor speaker, multi-class of power option (70V, 100V) and 8 ohms constant impedance input 3) DS-0115LW/LB: constant impedance speaker, to match DS-0115D digital speaker series or to be used separately (8 ohms constant impedance input) 4) DS-0115DW/DB: digital speaker, with decoding and digital amplifier inside. To match CCA-15D, the user is able to separately broadcast by the amplifier and speaker of it WS-0140W/B, DS-0115LW/LB, DS-0115DW/DB specifications: 1) Speaker caliber: 4.5"2) Rated power: WS-0140W/B (40W at 100V), DS-0115LW/LB (15W), DS-0115DW/DB (15W) 3) Max. power: WS-0140W/B (60W), DS-0115LW/LB (20W), DS-0115DW/DB (20W)4) Digital amplifier/decoding inside: WS-0140W/B (no), DS-0115LW/LB (no), DS-0115DW/DB (yes) 5) Optional power: WS-0140W/B (40, 30, 20, 10, 5W, 40W), DS-0115LW/LB (--), DS-0115DW/DB (15, 12, 9, 6, 3W, off) 6) Input impedance: WS-0140W/B (250, 333, 500, 1k, 2k ohms, 8 ohms), DS-0115LW/LB (8 ohms), DS-0115DW/DB (--) 7) Frequency response: 80Hz-20kHz8) Sensitivity: WS-0140W/B (88dB), DS-0115LW/LB (90dB), DS-0115DW/DB (90dB)9) Sound pressure level (1m): WS-0140W/B (104dB), DS-0115LW/LB (101dB), DS-0115DW/DB (101dB) 10) Body size: 200 x 15 x 290mmOuter packing: Carton dimensions: 478 x 342 x 580mm