PreSonus Eris Pro 8 Powered Studio Monitor (Each)

PreSonus Eris Pro 8 Powered Studio Monitor (Each)

The PreSonus Eris Pro 8 is an active two-way studio monitor built around a single point-source coaxial design, and it is that coaxial layout that defines everything about how it performs. Instead of mounting the tweeter above the woofer, the Eris Pro 8 places a 1.25-inch silk-dome tweeter at the centre of its 8-inch woven-composite woofer, so high and low frequencies radiate from the same point. The result is superior phase alignment between the drivers, a wider sweet spot, precise stereo imaging and symmetrical dispersion, advantages that matter in stereo mixing and even more in Dolby Atmos immersive rooms where monitors sit at many angles around the listener.

With 140 W of Class AB amplification, a front-ported enclosure and extension down to 35 Hz, the Eris Pro 8 covers the full range of most programme material without a subwoofer, while its rear-panel acoustic tuning controls let it adapt to real rooms rather than ideal ones. This listing is for a single monitor.

Key features

• Coaxial point-source design: Single point-source layout for better phase alignment, a wider sweet spot and precise stereo imaging.
• 8-inch woven-composite woofer: Coaxial low-frequency driver delivers tight, clear bass with extension down to 35 Hz.
• 1.25-inch silk-dome tweeter: Ultra-low-mass coaxial tweeter gives snappy, accurate transient response.
• 140 W Class AB power: Bi-amplified design with 75 W to the woofer and 65 W to the tweeter.
• 108 dB peak SPL: Peak output of 108 dB at 1 metre provides generous headroom for nearfield and midfield monitoring.
• Acoustic tuning controls: Mid and high frequency trims, low cut and three-way Acoustic Space compensation for wall or corner placement.
• Flexible inputs: Balanced XLR, balanced 6.3 mm TRS and unbalanced RCA inputs connect almost any line-level source.
• Mount-ready cabinet: Provisions for wall and ceiling mounting simplify integration into stereo and multichannel immersive systems.

Why coaxial matters

In a conventional monitor, the woofer and tweeter are separated vertically, so the sound from each reaches your ears at slightly different times depending on your height and distance. That creates phase irregularities around the 3.1 kHz crossover and a sweet spot that shifts as you move. By making the two drivers concentric, the Eris Pro 8 radiates as a true point source: dispersion is symmetrical in every direction, imaging stays stable as you lean or move, and overhead or surround positions in an Atmos array behave predictably. PreSonus describes the design as horn-loaded coaxial, using the woofer cone’s geometry to support controlled high-frequency dispersion.

Power, response and dynamics

The bi-amplified Class AB stage provides 75 W to the low-frequency driver and 65 W to the tweeter, for 140 W in total. Frequency response is rated from 35 Hz to 20 kHz, unusually deep for a monitor of this size and a direct benefit of the large coaxial woofer and front-firing port, which also makes placement near a wall more practical. Peak SPL of 108 dB at one metre leaves headroom for dynamic programme material, and the detailed transient response keeps the presentation natural and less fatiguing over long sessions.

Tuning and day-to-day use

Rear-panel controls include continuously variable high-frequency and mid-frequency trims of plus or minus 6 dB, a low-cut filter with flat, 80 Hz and 100 Hz settings for use with a subwoofer, and three-way Acoustic Space tuning that compensates for the bass build-up caused by walls and corners. Protection circuits cover RF interference, output-current limiting, over-temperature and turn-on and turn-off transients, and a Power Saver mode engages after 40 minutes without audio. The vinyl-laminated MDF cabinet measures 270 mm wide, 326 mm high and 301 mm deep and weighs 9.5 kg.

For producers who want one monitor that works equally well as a stereo nearfield and as a channel in an immersive array, the Eris Pro 8 makes a strong, technically coherent case, and its coaxial imaging is something conventional two-way monitors simply do not offer.