1-inch

Buy at www.musicianscart.com PreSonus Eris 3.5 2nd Gen 3.5 inch 50W Active Powered Studio Monitors Pair White Pair,Compact size with studio-quality sound, sold as a pair,3.5-inch woven-composite low-frequency drivers,1-inch, ultra-low mass silk-dome high-frequency drivers,50W (25W per side) Class AB dual amplification,80 Hz to 20 kHz frequency response,98 dB SPL (Peak @ 1 meter),High- and low-frequency Acoustic Tuning controls,Balanced 1⁄4-inch TRS inputs unbalanced 1⁄8-inch stereo and RCA inputs,Integrated stereo headphone amplifier with front-panel 1⁄8-inch output,Front-panel Volume control,Rear-firing, round bass-reflex port,Protection RF interference, output-current limiting, over-temperature, turn-on/off transient, subsonic filter,Power Saver mode (engages after 40 minutes),Comes with speaker wire, 1⁄8-inch TRS to stereo RCA cable, and stereo 1⁄8-inch TRS to 1⁄8-inch TRS cable