PreSonus Eris E8 2-Way Active Studio Monitors (Single) 8-inch Kevlar low-frequency transducer and 1.25-inch (32 mm), ultra-low-mass, silk-dome, high-frequency transducer 140 watt, Class AB amplification; 105 dB maximum continuous SPL Front-firing acoustic port for superior bass-frequency reproduction; Optimized, resonance-suppressing internal bracing Midrange (+/-6 dB, continuously variable), HF (+/-6 dB, continuously variable), High-Pass (flat, 80 Hz, 100 Hz) and Acoustic Space settings (flat, -2, -4 dB) for accurate mixing contour RF interference, output current limiting, over-temperature, transient, and subsonic protection; Balanced XLR/ 1/4 -inch and unbalanced RCA inputs Balanced XLR / -inch and unbalanced RCA inputs