Mackie Thump DJ Bundle@+*Bundle offer comprising*, Mackie Thump 18s, Active Bandpass Subwoofer, Power: 600 W RMS, 1200 W Peak, Class D amplifier, Max. SPL (sound pressure level): 130 dB, Frequency response: 30-132 Hz, 2 XLR inputs for mono or stereo applications, 2 XLR high-pass outputs for top boxes, 2 XLR