PreSonus® Eris®-series studio monitors are used worldwide by audio engineers and producers who need to hear every detail of their recordings. PreSonus' best-selling studio monitors just got better! Eris 3.5 media reference monitors deliver studio-quality sound in an elegant, compact form factor that makes them ideally suited for bedroom studios, video production, and high-fidelity gaming setups. With 25 watts per side of onboard power, the Eris 3.5 reference monitors pack a serious punch, while still delivering clear, accurate audio. The weave and nature of the Eris 3.5's 3.5-inch woofer result in tight bass that you can feel, as well as cleaner overall sound. The one-inch silk-dome tweeter produces refined high-frequencies and is designed to radiate sound with a wide pattern, creating a large optimal listening area. Improved speaker voicing over previous designs delivers richer lows and a smoother crossover transition for articulate, accurate transient reproduction throughout the frequency range and a less-fatiguing listening experience. A convenient front-panel knob sets the level of both the power amp and the loud, clear headphone amplifier, with its front-panel jack. With three types of inputs, it's easy to connect just about any audio source to Eris 3.5 reference monitors. High- and low-frequency controls let you easily adjust the Eris speaker's frequency response to compensate for the acoustics of your space and create the most accurate sonic reproduction possible. Versatile Connectivity. PreSonus® Eris® 3.5 reference monitors connect to virtually any line-level audio source, using rear-panel, 1/4" TRS and RCA inputs and a front-panel, 1/8", stereo line input. You also get a convenient (and loud!) front-panel, 1/8", stereo headphone jack; connecting headphones mutes the speakers.