PreSonus Eris Pro 8 Powered 8" 140W Coaxial Studio Monitor w/ Mounting Threads (Single) Audio engineers, producers, and musicians looking for a professional studio monitor with a wide stereo image and precision phase alignment will be impressed with the PreSonus Eris Pro 8 Powered 8" 140W Coaxial Studio Monitor w/ Mounting Threads (Single), an active 2-way studio monitor which employs a single point-source coaxial design for clear and accurate sound reproduction. This design provides superior phase alignment between components and delivers a wide sweet spot, precise stereo imaging, and symmetrical dispersion patterns. The Eris Pro 8 has unique advantages for Dolby Atmos immersive rooms as well as stereo mix environments. Two Class-AB amplifiers deliver 75W to the 8" woven composite woofer and 65W to the 1.25" silk dome tweeter, which offers a snappy, accurate transient response. The monitor offers a frequency response from 20 kHz down to 35 Hz for a full-range sound without a subwoofer and plenty of volume (105 dB SPL). The rear panel provides acoustic tuning controls, including a three-position Acoustic Space switch that helps compensate for the boundary bass boost that can occur when a monitor is placed in a corner or near a wall. High and Mid controls help to further mitigate room anomalies, while a low cutoff filter makes it easy to integrate a subwoofer into your monitor setup. Lastly, provisions for wall and ceiling mounts make it easy to integrate Eris Pro 8 monitors into any stereo or multi-channel system.