PreSonus

PreSonus Eris E3.5 Nearfield Studio Monitor Speaker Pair

4.3 (15 reviews)

Studio-accurate nearfield monitoring in a 3.5" form factor — 50 watts Class AB with acoustic tuning controls for dialing in your specific mixing room.

$159.99*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The PreSonus Eris E3.5 is a self-powered nearfield studio monitor delivering 25 watts per speaker from a Class AB amplifier topology — a meaningful design choice at this price, as Class AB provides cleaner reproduction of transients and midrange detail than the switching artifacts you can hear in budget Class D designs. The 3.5" woven composite woofer pairs with a 1-inch silk-dome tweeter for a frequency response of 80Hz to 20kHz. That 80Hz floor is the defining constraint: this monitor tells you the truth about everything above it — vocal presence, guitar harmonics, reverb character, high-frequency content — but the bottom two octaves of your mix are outside its window. For podcast production, voiceover, acoustic recording, and tracking sessions, that's a non-issue. For producers making bass-dependent music, it's a fundamental limitation to work around deliberately.

The connectivity is smartly specified for the target user: balanced 1/4" TRS inputs connect directly from an audio interface without an adapter, RCA inputs cover consumer and DJ gear, and the 3.5mm aux input gives you an instant reference source for checking your mix against streaming audio or playback from a phone. The acoustic tuning controls — high-frequency and mid-frequency shelving — are a PreSonus differentiator at this tier; most monitors this size offer no correction tools at all. They allow the E3.5 to be adjusted for common room problems like proximity to walls or shelving coloration without requiring acoustic treatment. Built for desktop studios, home recording setups, and content creators who want accurate midrange translation without committing to a larger footprint, the E3.5 punches above its footprint when the material keeps it in its operating range.

Key Features

3.5" woven composite woofers deliver solid low-end sound with minimal bass distortion

50-watt Class AB amplification (25 Watts per speaker) provides plenty of volume and headroom for nearfield monitoring

RCA and balanced 1/4" inputs provide all the connections you may need

Aux input for connecting your smartphone or media player

Acoustic tuning controls let you contour your sound to best meet your mixing environment

Specifications

Woofer
3.5" woven composite
Tweeter
1-inch silk-dome
Amplification
50W Class AB (25W per speaker)
Frequency Response
80Hz – 20kHz
Inputs
Balanced 1/4" TRS, RCA, 3.5mm Aux
Configuration
Stereo pair (active + passive)

Pros & Cons

👍 Pros

  • Balanced 1/4" TRS inputs provide a clean, interference-free connection from any standard studio audio interface.
  • Acoustic tuning controls (high and mid shelving) allow corrective adjustment for the E3.5's behavior in real-room environments, not just anechoic spec conditions.
  • 1-inch silk-dome tweeter extends response to 20kHz, preserving the high-frequency detail needed for reverb tails, cymbal articulation, and sibilance evaluation.
  • 50-watt Class AB amplification provides adequate headroom at nearfield distances without crossover distortion artifacts common in Class D designs at this price tier.
  • 3.5mm aux input enables quick A/B referencing against consumer playback sources — a genuinely useful mixing cross-check without additional hardware.

👎 Cons

  • 80Hz low-frequency cutoff means the E3.5 cannot reproduce sub-bass or fundamental bass content — mixes made purely on these monitors require low-end verification on full-range speakers or headphones.
  • At 25 watts per speaker, the E3.5 does not have the dynamic headroom for high-SPL critical listening sessions; pushing the volume control significantly risks introducing distortion before adequate levels are reached in larger rooms.
  • The 3.5" woofer physically limits bass extension and maximum SPL output — there is no workaround outside of adding a matched subwoofer.
  • No XLR balanced input; TRS-only balanced connection means users with XLR-output interfaces need a TRS adapter or cable.
  • Single-channel volume control on one monitor only; no independent L/R level trim, which makes correcting stereo imaging imbalances from the room more difficult.

Frequently Asked Questions

The frequency response is rated down to 80Hz. Below that, you're working without a reference — kick drum fundamentals, bass guitar, and sub-bass content below 80Hz are not reproduced. For critical bass mixing, supplementing with a subwoofer or checking mixes on headphones is necessary.
The E3.5 accepts balanced 1/4" TRS inputs (the preferred connection for studio interfaces), unbalanced RCA inputs, and a 3.5mm aux input for consumer sources. Use the balanced TRS connection from your interface whenever possible to reject interference on the signal run.
PreSonus includes high-frequency and mid-frequency shelving controls to compensate for room acoustics — for example, pulling the HF down if your mixing position sits near a reflective wall. These are corrective tools for the room, not tone controls for personal preference.
Each speaker is driven by a 25-watt Class AB amplifier, summing to 50 watts total. At nearfield distances (2–4 feet), 25 watts per side is sufficient for accurate monitoring levels without clipping headroom. These are not designed for room-fill or live applications.
No. Each monitor is self-powered with onboard Class AB amplification. No external amp is needed — connect directly from your audio interface or mixer output.