From Amazon
Visaton FR 9.15 15 W Black – Speakers Speaker, 15 W, 30 Watt, 75 – 16000 Hz; 4 Ω (10,2 cm (4), Black)
Conrad Electronic
Visaton FR 9.15 - 4 Ohm 5.9 inch 15 cm Wideband speaker 15 W 4 Ω
Farnell
VISATON Fr9.15 4Ohm Loudspeaker, Oval, 4 Ohm, 9 X 15 Cm