EMB ESM4 550W Max Power Compression Tweeter WORKS FOR JBL, Peavey, Cerwin Vega, Gemini, EMB, BMB, Pyle-Pro, Mr.DJ & MANY BRANDS! Max Power: 550 Watts Single Voice Coil 1-3/8" Mounting Screw Impedance: 8 Ohm Frequency: 1.2k-20kHz