Presonus Eris E3.5 Stand Set@+*Bundle offer comprising*, Presonus Eris E3.5, Active Studio Monitors, 3.5"" Woofer with Kevlar cone, 1"" Tweeter with silk cone, Frequency range: 80 - 20,000 Hz, Sound pressure level: 100 dBA SPL (peak), Inputs: TRS jacks (L/R symmetrical), RCA pair (L/R), Treble control, Bass