Miniature speaker Visaton K 64 WP, 50 ohm, 2.52 inch
Visaton K 36 Wp 1 3/8in 1,4 Inch Miniature Speaker 50 Ohm 1 Pair | eBay
Speaker Impedance, Power Handling, and Wiring | Jensen Loudspeakers
Mini Speaker - 0,5 W - 50 Ohms - Ø 50 mm
Alpha TE-TT-201 STR 3 Wire Panel Speaker/Microphone Includes 1-L5 (50-Ohm) Speaker 1-Mk1c Electret Condensor Microphone and Connector Plate
Mini Speaker - 0,5 W - 50 Ohms - Ø 50 mm
Amazon.com: MIYAKO USA (TS-416 4" Professional Grade Replacement for Speaker 50 watts Power at 4 ohms 10oz Magnet Round Speaker for Repairs Black (1 Pair) : Electronics