Turbosound TS-18SW700/8A, 18"" Bass Speaker, For PA applications, Tight and punchy bass performance, Peak power of up to 2,800 watt output power (700 watt RMS), Impedance: 8 ohms, Frequency range: 35 to 2000 Hz, Maximum level: 96 dB (1 w / 1 m), Extremely stiff and lightweight aluminium die-cast frame, Low weight ideal for use as a replacement driver - or for use in custom reusable PA and subwoofer enclosures, Mounting hole diameter: 442 mm (17.4""), Weight: 10.59 kg