Check the listing for details. LD Systems ICOA 15 A BT 15 Inch Active Coaxial PA Speaker with Bluetooth. Condition: New. Listed at 599.99 USD. Product type: PA loudspeaker. The high-efficiency class-D amplifier produces a maximum SPL of 128 dB and 300 W RMS, ensuring powerful performance suitable for both small and large venues. Outstanding bass performance with horn-loaded woofer.