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Selene + Poseidon system
Full-range Compact System
Coaxial + Passive bass extension , Full-range compact system , 3-way
Selene + Poseidon
Hey...Nice Stack!

Nearfield, desktop, surrounds. Fits everywhere.

Buy System View Specs
System Response
±1.5dB 50Hz–30kHz
LF Extension
F6 at 35Hz
System SPL
106dB @ 1kHz
LF SPL
98dB @ 50Hz
Configuration
3-way compact
The System

Not a monitor and a subwoofer. A system.

Selene handles everything immersive monitoring demands with ±1.5dB accuracy and point-source coherence. Poseidon removes the one constraint Selene can’t overcome on its own: the physical limits of a 6.5-inch enclosure below 80Hz.

Together they form a fully realized, full-range loudspeaker system in a desktop footprint. Poseidon integrates through Selene’s EXCore module, powered and calibrated by the same DSP. No additional amplifier. No separate configuration. The system reaches 50Hz linear, with the same phase coherence and accuracy that defines the range.

Poseidon is passive. Power, crossover, and calibration come from Selene’s EXCore. One system, one control point, one calibration path. Connect the umbilical. Done.

System Integration

One EXCore module. One system.

Poseidon is powered by Selene's EXCore. The EXCore already contains two spare amplifier channels reserved for Poseidon. Connect the umbilical, configure the crossover in EXCore's DSP, done. No rack unit, no extra box, no level matching.

The same calibration that linearizes Selene linearizes Poseidon. The same over-the-air updates that improve Selene improve the complete system. One control point, one system.

Performance

50Hz linear. ±1.5dB. Desktop footprint.

The integrated system delivers ±1.5dB frequency response from 50Hz to 30kHz, F6 at 35Hz, and 106dB continuous SPL at 1kHz. Point-source coherence from Selene's coaxial driver is maintained across the full range.

For nearfield stereo, immersive monitoring, and any application where accuracy matters but space doesn't allow a full-size main, this is the system. Poseidon at 165mm cube. Selene at 165mm cube. Together they outperform monitors twice the size.

System Photography

Full range. Desktop footprint.

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POSEIDON_34_STACK copy.webp
What's Included
Coaxial Monitor
Selene
Turns out six inches IS enough.
Type2-way coaxial, EXCore architecture
Freq. Response±1.5dB, 80Hz–30kHz
Max SPL106dB @ 1kHz
Driver16cm custom TPCD coaxial, 3rd gen
AmplificationHypex NcoreX via EXCore
Powers PoseidonVia EXCore expansion channels
Full Selene specs →
Passive Bass Extension Pair
Poseidon
Sometimes you need it to go deeper.
TypePassive, EXCore-powered
LF ExtensionF6 at 35Hz (50Hz linear)
Crossover150Hz, zero-phase LR4 via EXCore
Driver15cm Epique MMAG, 14.7mm Xmax per unit
Configuration165mm cube
QuantityPair (2 units)
Full Poseidon specs →
System Specifications

Selene + Poseidon.
Combined performance.

System Performance
Frequency Response±1.5dB, 50Hz–30kHz
LF ExtensionF6 at 35Hz (50Hz linear)
Phase Response±15°, 30Hz–30kHz
Max SPL @ 1m106dB @ 1kHz
Poseidon SPL @ 50Hz98dB continuous per driver
Integration Crossover150Hz, zero-phase LR4 digital
Configuration3-way compact
EXCore Electronics
DSPADSP-21569 SHARC+
DACAKM AK4493SEQ
AmplificationHypex NcoreX (Selene + Poseidon channels)
Form Factor2RU half-rack
ControlWiFi (ESP32), OTA calibration
Selene Driver
Coaxial16cm custom TPCD, 3rd gen variant
Mid/HF Crossover3kHz passive LR2, phase inverted tweeter
Poseidon Bass Extension Driver
Driver (per unit)15cm Epique MMAG custom bass extension driver
Linear Excursion14.7mm per direction (Xmax)
ElectronicsPassive, EXCore-powered
Dimensions165 x 160 x 165mm, 6.4kg per unit
Connectivity
Analog InputXLR balanced
Digital InputAES/EBU
Network (optional)Dante Pro S1
Get the System

Full range monitoring.
Desktop footprint.

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