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ET-501 is a outdoor loudspeaker adopt  waterproof resin shell and stainless steel hanging. could be suitable for various of weather. Waterproof paper cone driver. Voice clear, nice. Output impedance design by factory: need to change impedance in 16W, 620Ω, use screwdriver to change the position of knob in speaker rear plate. Note: This loudspeaker use 70v/100v constant voltage amplifier, can not use a low output impedance amplifier. Without voice output when rotary knob in " off ". Please note that it will destroy the loudspeaker once rotary knob in “—” in a 100v circuit. 

SPECS

Loudspeaker: 10cm tapered Loudspeaker

Rated Power: 16W

Impedance: 306Ω, 620Ω, 1.25kΩ, 2.5kΩ

Freq. Response: 130-1.3kHz

Sensitivity: 96dB

Outlook: 

Body: ABS Resin, Grey white

Stand: Stainless Steel

Net: Plating Mirror Net, Black Gray

Diameter: 210mm

Weight: 2kg