The PreSonus Eris 4.5BT 2nd Gen is a compact yet powerful active 2-way studio monitor pair, designed for near-field monitoring, multimedia playback, music production, content creation, gaming and general desktop listening. 

With a 4.5" woven-composite woofer and a 1" silk-dome tweeter, it delivers tight, articulate bass and detailed, balanced highs — providing a clean and accurate sound signature even in small or compact rooms.

Equipped with multiple input methods — including Bluetooth 5.0 — plus front-panel aux and headphone outputs, the Eris 4.5BT 2nd Gen is very flexible for different use-cases: from connecting an audio interface, PC, or console, to streaming music straight from a phone or tablet. Using a Class-AB amplifier providing 25 W per speaker, it has enough power for desktop studios or small rooms without being bulky.

The compact bass-reflex MDF enclosure offers a balance of portability and solid build, making the 4.5BT 2nd Gen a great all-rounder if you want reliable, accurate sound from a small footprint.

Features:

• 4.5″ woven-composite woofer (low frequencies)
• 1″ ultra-low-mass silk-dome tweeter (high frequencies)
• 50 W Class-AB bi-amplification (25 W per speaker)
• Frequency response: 70 Hz – 20 kHz
• Maximum sound pressure level (peak): ~ 100 dB @ 1 m
• Balanced ¼" TRS inputs (L/R) and unbalanced RCA inputs (L/R) on rear panel
• Bluetooth 5.0 stereo input — for wireless streaming from mobile devices, tablets, laptops, etc.
• Front-panel 3.5 mm stereo mini-jack input for aux devices (smartphone, tablet, etc.)
• Front-panel 3.5 mm headphone output with built-in headphone amplifier
• Front-panel volume control with power on/off switch and status LED
• Rear-panel acoustic tuning: separate Bass and Treble shelving controls (±6 dB) — for room-specific sound adjustments
• Auto-standby switchable (saves power when not in use)
• Compact bass-reflex enclosure made of vinyl-laminated MDF — sturdy yet fits well in small workspaces