Point-source Precision in a Compact Cube
Packing point-source monitoring into a 6.5-inch cube, the Ex Machina Soundworks Selene offers high-precision monitoring for engineers who demand nothing but the best. Able to tackle immersive and nearfield scenarios with equal aplomb, this passive 2-way coaxial studio monitor is built around a 6.3-inch coaxial midrange/tweeter housed in an acoustically inert aluminum extrusion cabinet and powered by an external EXCore amplification and DSP module. The Selene offers picture-book precision with a consistent conical coverage pattern, an 80Hz to 30kHz frequency response, and immaculate phase coherence, making it suitable for Dolby Atmos, multichannel surround, or compact stereo applications. The Selene uses proprietary in-house DSP calibration, individual driver measurement, and an over-the-air calibration system that updates performance over time via Wi-Fi, ensuring continuous optimal performance. The EXCore’s modular architecture features premium-caliber Hypex NcoreX amplification, SHARC-based DSP, and AKM converters, and you can add optional Poseidon subwoofers to your setup to build a compact 3-way system. Finally, the Selene’s over‑engineered passive crossover, which is optimized for low distortion, flawless phase tracking, and minimal damping loss, maintains Ex Machina’s core philosophy of phase‑coherent, measurement‑driven monitoring in a space‑efficient form factor.
Related Videos: Selene Passive Studio Monitors
Purpose-built drivers meet a premium passive crossover
Built around a purpose-designed 6.3-inch version of Ex Machina Soundworks’ third-generation coaxial midrange/tweeter, the Selene shares the same motor structure as the company’s Terra but is optimized with a smaller diaphragm and longer throw. This enables this pint-sized cube to function as a standalone surround monitor, delivering high-frequency extension beyond 40kHz with DSP limiting extension to 30kHz. Additionally, the Terra exhibits exemplary point-source phase coherence via custom TPCD diaphragms, FEA-optimized motors, and an underhung surround. You also get a 3kHz internal passive crossover with ultra-low-DCR components, precision impedance matching, counter-wound inductors for extreme magnetic field cancellation, premium parallel polypropylene capacitors, and vibration-isolating mounts. Finally, the Selence delivers letter-perfect phase tracking, thanks to a crossover so consistent that DSP can treat the coaxial as a full-range driver, preserving damping factor, control, and precision, with each speaker individually measured and linearized prior to crossover.
Reference-grade EXCore architecture
Engineered for the utmost in transparency, the Ex Machina Soundworks Selene’s amplification and DSP are housed in the external EXCore module, a compact half‑rack unit that contains Hypex NcoreX amplification, a Peregrine DSP platform built around an ADSP‑21569 SHARC+ processor with an ESP32 coprocessor, and high‑quality AKM A/D and D/A converters. This modular EXCore architecture not only powers a pair of Selene coaxial monitors but also enables flexible system expansion, allowing you to integrate Poseidon subwoofers into your setup without the need for additional amplification or DSP hardware.
Monitoring that never stops getting better
Driven by the third generation of Ex Machina Soundworks’ proprietary IRC and DSP architecture, the Selene allows for precise, independent control of each driver with discrete, perfectly phase-summed corrections applied at the transducer level, certifying hyper-accurate phase tracking at the driver level. Moreover, each Selene speaker is individually measured and calibrated, with the 2‑driver design linearized to achieve a ±1.5 B frequency response and ±15° phase deviation across 30Hz to 30kHz. Additionally, the studio experts at Sweetwater have found that since all units are calibrated to the same reference target, you can deploy any two Selene speakers as a matched pair with absolute confidence. Lastly, an onboard ESP32 coprocessor delivers periodic over-the-air updates to DSP corrections as measurement techniques, datasets, and algorithms evolve, ensuring that your system’s performance continues to improve over time.
Ex Machina Soundworks Selene Features:
- Passive 2-way coaxial studio cube with uncompromising accuracy and flawless translation
- Tackles immersive and nearfield scenarios with equal aplomb
- Impressive 80Hz–30kHz frequency response with ±15° phase coherence
- 6.3-in. coaxial midrange/tweeter with custom TPCD diaphragms, an FEA-optimized hybrid motor structure, and an underhung surround
- 3kHz internal passive crossover with ultra-low-DCR components yields letter-perfect time alignment and imaging
- Precision impedance matching, counter-wound inductors, premium parallel polypropylene capacitors, and vibration-isolating mounts
- Powered by an external EXCore amp and DSP module
- Transparent electronics built around a SHARC‑based DSP platform, AKM converters, and Hypex NcoreX amplification
- Proprietary IRC and DSP architecture allows for precise, independent control of each driver
- Each unit is individually measured and calibrated to the same reference target
- Over-the-air calibration updates ensure continuous optimal performance
- Optional Poseidon sub integration for extended LF performance in larger spaces (sub sold separately)
