PreSonus Eris Studio 4 4" Active Studio Monitor with EBM Waveguide STUDIO PAK Drums | Electronic Drums | Acoustic Triggers the natural resonance of that

the natural resonance of that instrument is maximized

An essential accessory for the Korg B1 digital Piano

with sounds ranging from warm pads to fat basses to crisp leads

The built-in three-channel mixer accepts mic/line inputs via combo connector (with switchable phantom power)

Depending on the trigger source it works as attack/decay or as attack/sustain/release envelope

PreSonus Eris Studio 4 4" Active Studio Monitor with EBM Waveguide STUDIO PAK Drums | Electronic Drums | Acoustic Triggers the natural resonance of thatThe Eris Studio 4 sets a new standard for compact studio monitors. With its surprising amount of low end and a wide, well controlled sweet spot, you can enjoy studio grade monitoring in even the smallest of spaces. The custom designed EBM (Elliptical Boundary Modeled) waveguide provides superior high frequency response and wider 100 degree horizontal dispersion to create a broad sweet spot. Narrow vertical dispersion reduces reflections from your desk