PreSonus Eris Pro 4 4.5" Coaxial Studio Monitor
The PreSonus Eris Pro 4 is a 4.5-inch active coaxial studio monitor: the tweeter sits in the centre of the woofer, so all the sound comes from a single point. The result is a stereo image that stays precise even when you are not sitting dead centre.
What sets it apart
- Single point-source coaxial design for better phase alignment
- 4.5 in. woofer and 1 in. silk-dome tweeter
- 80 W Class AB, 50 Hz to 20 kHz response
- Acoustic Space, high, mid and low-cut controls
- Provisions for wall or ceiling mounting
- Power-saver mode that kicks in after 40 minutes
Why coaxial
On a conventional monitor, the tweeter sits above the woofer: the sound changes as soon as you stand up or lean over. By putting both on the same axis, the Eris Pro 4 delivers a wide sweet spot, symmetrical dispersion and a precise stereo image.
PreSonus highlights this for Dolby Atmos immersive rooms, where several monitors surround the listener, as much as for stereo mixing.
On the wall, on the ceiling or on the desk
The 229 mm tall cabinet is designed to take wall and ceiling mounts, sold separately. The Acoustic Space setting (flat, -2 dB or -4 dB) offsets the extra bass of a monitor placed against a wall or in a corner.
Specifications
| Type | 2-way active coaxial monitor, sold individually |
|---|---|
| Drivers | 4.5 in. woven composite woofer, 1 in. silk-dome tweeter |
| Amplification | 80 W Class AB (45 W low, 35 W high) |
| Frequency response | 50 Hz to 20 kHz |
| Peak level | 99 dB SPL at 1 m |
| Crossover frequency | 3.4 kHz |
| Controls | Acoustic Space, high and mid ±6 dB, low cut 80 or 100 Hz |
| Inputs | Balanced XLR and 1/4 in. TRS, unbalanced RCA |
| Dimensions | 190 x 229 x 218 mm (W x H x D) |
What it's for
- Dolby Atmos immersive mixing room with multiple monitors
- Stereo studio where you often work away from the ideal listening spot
- Wall or ceiling install in a small control room
Compared with other manufacturers
Coaxial designs are still rare in small monitors. Here are other manufacturers that use them, each with its own approach.
| Manufacturer | Model | Drivers | Approach |
|---|---|---|---|
| PreSonus | Eris Pro 4 | Coaxial 4.5 in. and 1 in. | 2-way, 80 W, sold individually |
| JBL | 104 | Coaxial 4.5 in. and 0.75 in. | Desktop pair, 60 W total |
| Kali Audio | IN-5 | 5 in. woofer, coaxial mid and tweeter | 3-way |
| Kali Audio | IN-UNF | Coaxial satellites, two 4.5 in. woofers | Ultra-nearfield desktop system |
Frequently asked questions
- Is the Eris Pro 4 sold as a pair?
- No. PreSonus sells it individually; you need two for stereo listening.
- What is the frequency response of the Eris Pro 4?
- 50 Hz to 20 kHz, thanks to its ported cabinet and 80 W of amplification.
- What are the dimensions of the Eris Pro 4?
- 190 mm wide, 229 mm tall and 218 mm deep.
- Do I need an audio interface to connect the Eris Pro 4?
- It accepts any line-level source: balanced XLR and TRS inputs or RCA. An audio interface is the most common connection in a studio.
Avis clients
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