PreSonus

PreSonus 2777500133 Eris 3.5-inch White Studio Monitors

25W50W

Compact 50W studio monitors with balanced inputs and room-tuning controls for accurate music production and critical listening.

$99.99*$114.99Save 13%
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*Price sourced from Amazon.com. Last updated:Aug 29, 2026.Price and availability are subject to change — details.

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Overview

The PreSonus Eris 3.5 Media Reference Monitors pack studio-grade accuracy into a desktop-friendly form factor. Each pair delivers 50 watts of total Class AB amplification — 25 watts per side — through 3.5-inch woven-composite woofers and 1-inch silk-dome tweeters. The woven-composite cone design produces tight, controlled bass while the low-mass silk-dome tweeters create an ultra-wide listening sweet spot, so you get reliable stereo imaging even when you're not seated perfectly on-axis. The white finish gives these monitors a clean, modern appearance that blends well with contemporary desk setups.

Connectivity is a standout feature for monitors at this size and price point. The rear panel offers ¼-inch TRS balanced inputs for audio interfaces and professional gear alongside RCA unbalanced inputs for turntables or consumer electronics. A front-panel ⅛-inch aux input lets you quickly plug in a phone or tablet, and the adjacent headphone output with built-in amplifier means you can switch to private monitoring without rewiring anything. High- and low-frequency acoustic tuning controls on the back panel let you dial in the response to suit your room dimensions, desk reflections, and personal preference — a feature typically reserved for larger, more expensive monitors.

Key Features

TRUSTED STUDIO-QUALITY SOUND: True studio sound for music production, gaming, movies, streaming, and everyday audio. Sold as a complete stereo pair.

POWERFUL, DISTORTION-FREE SOUND: 50 watts of built-in amplification drives clear, dynamic sound at any volume — powerful enough to fill the room, clean enough to hear every detail.

ACCURATE, POWERFUL SOUND: 3.5” woven-composite woofers deliver deeper, tighter bass while 1” silk-dome tweeters smooth out harshness for clear, balanced highs across the full range (80 Hz–20 kHz).

DIAL IN PERFECT SOUND IN ANY ROOM: Built-in high- and low-frequency acoustic tuning controls let you tailor the sound to your space — no treatment or extra gear needed to get clear, balanced audio anywhere.

CONNECTS TO EVERYTHING ON YOUR DESK: Balanced TRS, RCA, and a front-panel aux input plug straight into your computer, audio interface, mixer, game console, phone, or turntable — plus a front headphone jack for private listening.

Specifications

Brand
PreSonus
Model
2777500133
Type
Media Reference Monitors
Color
White
Woofer Size
3.5 inches
Woofer Material
Woven Composite
Tweeter Size
1 inch
Tweeter Type
Silk-Dome
Amplification
50W total (25W per side), Class AB
Frequency Response
Up to 20 kHz
Inputs
¼-inch TRS balanced, RCA unbalanced, ⅛-inch TRS stereo aux
Headphone Output
Front-panel ⅛-inch TRS with built-in amplifier
Power Saving
Auto-engages after 40 minutes idle

Frequently Asked Questions

They are sold as a pair, with one active speaker and one passive speaker connected together.
The rear panel has ¼-inch TRS balanced inputs and RCA unbalanced inputs, and the front panel has a ⅛-inch TRS stereo aux input for phones or portable devices.
Yes, there is a front-panel headphone output with a built-in headphone amplifier for private listening.
Yes, high-frequency and low-frequency tuning controls on the rear panel let you customize the output for your room size and speaker placement.
Yes, a power-saving mode automatically engages after 40 minutes of idle time.