PreSonus Eris E8 2-Way Active Studio Monitor Pair Bundle with Isolation Pads, TRS Cables, and Austin Bazaar Polishing Cloth 1-inch (25 mm), ultra-low-mass, silk-dome, high-frequency transducer Front-firing acoustic port for superior bass-frequency reproduction Balanced XLR / 1/4-inch and unbalanced RCA inputs Midrange (+/-6 dB, continuously variable), HF (+/-6 dB, continuously variable), High-Pass (Off, 80 Hz, 100 Hz) and Acoustic Space settings (flat, -2, -4 dB) for accurate mixing contour Optimized, resonance-suppressing internal bracing