... type, your ideal choice 2 Beautiful appearance, pefect sound quality BF-215A pro amplifier speakerhas a perfect appearance, 10-inch woofer ... hall, gymnasium, schools, parks and other public facilities. Model number: BF-215A pro amplifier speaker Driver unit: 15"+1.5hornRated Impedance ... response: 53Hz-20kHzSensitivity: 102dBSize: 460*480*720mmWeight: 25.2kg(2pcs) BF-215A pro amplifier speaker