PreSonus - Eris 4.5BT 2nd Gen Bluetooth Reference Monitors
Our best-selling 4.5-inch media reference monitors with Bluetooth® wireless technology are perfect for home studio recording, music production, or making your next hit.
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The Nantel Verdict
The Nantel Verdict
4.5-inch woofer with refined waveguide design; Class D amplification; integrated Bluetooth 5.0 for wireless source switching; front-panel volume and input selection; room boundary controls for acoustic adaptation.
Requires balanced XLR or unbalanced RCA connections (cables not included). Desktop isolation pads recommended to minimize vibration transmission. Nearfield placement essential for accurate stereo imaging. Budget for acoustic treatment in untreated spaces.
Dependable monitoring at an accessible price point. The Eris 4.5BT Second Gen serves as a reliable foundation for mixing and production work, delivering enough resolution to catch problems while remaining forgiving in less-than-ideal acoustic environments.
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Review by the Nantel Musique team
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4.5-inch Media Reference Monitors with Bluetooth® Wireless Technology
Our best selling studio monitors just got better! Eris® 4.5BT media reference monitors deliver studio-quality sound in an elegant, compact form factor that makes them ideally suited for bedroom studios, video production, and high-fidelity gaming setups.
With 25 watts per side of onboard power, the Eris 4.5BT reference monitors pack a serious punch, while still delivering clear, accurate audio. The weave and nature of the Eris 4.5BT's 4.5-inch woofer result in tight bass that you can feel, as well as cleaner overall sound. The one-inch silk-dome tweeter produces refined high-frequencies and is designed to radiate sound with a wide pattern, creating a large optimal listening area. Improved speaker voicing over previous designs delivers richer lows and a smoother crossover transition for articulate, accurate transient reproduction through the frequency range and a less-fatiguing listening experience.
A convenient front-panel knob sets the level of both the power amp and the loud, clear headphone amplifier, with its front-panel jack. With four types of inputs, including fast, reliable, stereo Bluetooth® 5.0 connectivity, it's easy to connect just about any audio source to your Eris 4.5BT reference monitors. High- and low-frequency controls let you easily adjust your Eris speaker's frequency response to compensate for the acoustics of your space and create the most accurate sonic reproduction possible.
Need a little more low end? Add an Eris Sub 8BT to build a perfectly matched 2.1 sound system that fits almost anywhere.
Features
- 4.5-inch, woven-composite, low-frequency driver
- 1-inch, ultra-low mass, silk-dome, high-frequency driver
- Fast, reliable stereo Bluetooth® 5.0 wireless input
- 50W, Class AB dual amplification
- 70 Hz to 20 kHz frequency response
- 100 dB SPL (Peak, @ 1 meter)
- High- and low-frequency Acoustic Tuning controls
- Balanced, ¼-inch TRS inputs; unbalanced, ⅛-inch stereo and RCA inputs; and integrated stereo headphone amplifier with front-panel ⅛-inch output
- Protection: RF interference, output-current limiting, over-temperature, turn-on/off transient, subsonic filter
- Power Saver mode (engages after 40 minutes)
- Comes with speaker wire, ⅛-inch TRS to stereo RCA cable, and stereo ⅛-inch TRS to ⅛-inch TRS cable
Highlights
Built to match your room.
Unlike other home audio speakers that hype the bass at the expense of other frequencies, Eris® speakers provide an even response throughout the frequency range, from bass to treble. This means you’ll hear your favorite music exactly as artists and engineers intend it to be heard. High and Low Acoustic Tuning controls let you dial in the Eris 4.5 BTs precisely to your environment to further ensure the best sound possible.
Honest. Expressive. Powerful.
Like all PreSonus media reference monitors, the Eris® 4.5 BT offers consistent, accurate listening. Their stylish design makes them a welcome addition to living rooms, compact home theater setups, and gaming rigs, and their smooth and even frequency response ensures that your music — and everyone else’s — will sound incredible.
| Electronics | |
|---|---|
| Bluetooth | Bluetooth® V5.0 |
| Input Impedance | 10 kΩ |
| VoltageRequirements | 100-240 VAC, 50-60 Hz |
| General | |
| Color | Black |
| Product Name | Eris® 4.5BT, Black, NA |
| Series | Eris® |
| Hardware | |
| Audio Controls | Volume High Frequency (±6 dB, center 10 kHz, continuously variable) Low Frequency (±6 dB, center 100 Hz, continuously variable) |
| Cabinet Material | Vinyl-Laminated, Medium-Density Fiberboard |
| HF Transducers | 1” Ultra Low Mass, Silk Dome Tweeter |
| LF Transducers | 4.5" Woven Glass Fiber Composite |
| Monitor Inputs | Bluetooth® 5.0, 1- Stereo 1/8", 2- Balanced 1/4” TRS, 2- Unbalanced RCA |
| Monitor Type | 2-Way Active |
| Power Amplifier Type | Class AB |
| Measurements | |
| Product Depth | 7" (17.8 cm) |
| Product Height | 9.5" (24 cm) |
| Product Height/Length | 9.5" (24 cm) |
| Product Width | 6.4" (16.3 cm) |
| Miscellaneous | |
| Power Cable | IEC |
| Protections | RF Interference |
| - | Output-Current Limiting |
| - | Over-Temperature |
| - | Turn-On/Off Transient |
| - | Subsonic Filter |
| Performance | |
| Peak SPL | 100 dB (@ 1 meter) |
| Speakers | |
| Crossover Frequency | 2.8 kHz |
PreSonus is a leading manufacturer of professional audio equipment and software, renowned for delivering studio-grade solutions at accessible price points. With decades of experience in recording technology, the company has built a reputation for precision engineering and innovation in monitor design, making professional-quality sound monitoring available to home studios and emerging producers worldwide.

