Used for a short time. Total 4 speakers: JBL SRX725 dual 16" passive loudspeakers. Drivers: Two 16-inch woofers and one 4-inch voice coil tweeter. Power: Designed for high-power applications, typically delivering 1200 watts continuous output. Peavey CS 4080HZ professional power amplifier, a 2-rack-space stereo power amp known for high wattage and DDT anti-clipping protection. Power output: 2040 watts (RMS) per channel at 4 ohms or 1250 watts at 8 ohms, bridged power output up to 4080 watts at 4 ohms. Audio protection: Includes Peavey's exclusive DDT compression anti-clipping protection to protect speakers and prevent distortion. Cooling system: JBN F4-USB 4-channel professional mixing studio audio sound console device. Features: Includes 4 channels with Bluetooth connectivity and USB interface for MP3 playback.