13cm (5?) broad band loudspeaker with inverse corrugation. Very special construction (only 28mm) , therefore it is applicable everywhere where only less space is available. Applications: in-built loudspeaker at vehicles, busses or railed vehicles, electronic music instruments, control loudspeaker at electronic devices. Optional: guard-grid art. no. 49809. Technical Data: rated/maximum power 15W/40W, impedance: 4 ?/ 8?, frequency response (-10 dB): 60-20000Hz, mean sound pressure level: 86dB (1 W/1 m), excursion limit xmech: -, resonance frequency: 105 Hz, height of front-pole plate: 3mm, voice of coil diameter: 20mm, height of winding: 4,5mm, cut-out in the baffle: 114mm, net weight: 0,284kg.