TESSERACT 18
The New Reference
Redefining Bass for High-End Two-Channel Audio
The Tesseract 18 is not a refinement of existing subwoofer design. It is a complete rethinking of how low frequencies should be reproduced in a true Hi-Fi system. Built for uncompromising two-channel listening, it delivers bass that is fast, articulate, and transparent, allowing music to breathe with a natural sense of scale, detail, and emotional impact.
Where conventional subwoofers prioritize output, Tesseract 18 prioritizes accuracy, integration, and control. Correcting distortion is never perfect, so the only path to truly pure bass reproduction is to eliminate it before it is ever introduced.
At its core is the IsoCore™ motor (patent pending), a revolutionary topology that precisely shapes and stabilizes the magnetic field across the full stroke of the driver. The result is absolute linearity, ensuring that every note, from the most subtle nuance to the most powerful transient, is reproduced with vanishingly low distortion.
The driver is housed within the Monolith Matrix™ enclosure, a cast epoxy structure with an internal constrained damping architecture of carbon fiber and Sorbothane®. This eliminates resonance and stored energy, allowing the driver to operate in complete isolation. A multi-layer composite cone maintains pistonic motion, pushing cone breakup to beyond 600Hz. A single-point mounting system and full mechanical isolation prevent vibration transfer at every interface.
Designed for true Hi-Fi, Tesseract 18 is part of a fully engineered system alongside the Bass Manager and AMP L1 amplifier, each housed in a separate enclosure for optimal thermal and vibrational isolation. The Bass Manager provides full-range signal pass-through, ultra-precision crossover integration, boundary compensation, and delay compensation for seamless blending with main speakers. The AMP L1 features TRUE Temp™ thermal protection, monitoring voice coil temperature directly at the source to maintain linear performance under load.
Together, this architecture aligns signal path, power delivery, and acoustic output into a unified system engineered for reference-level performance.
Application
High-end two-channel systems where absolute accuracy, integration, and musicality are the priority
Recommended Configuration
One, two, or more per space, distributed to counteract room modes and achieve uniform low-frequency response
Details
TRUE Temp™ direct voice coil temperature monitoring for precise, real-time thermal management
IsoCore™ motor topology for extreme linearity and control
Monolith Matrix™ four-layer enclosure with advanced damping, mass loading, and zero-fastener construction
Composite carbon fiber cone with dual-core structure for rigidity and damping
Single-point driver mounting with full cabinet vibration isolation
Sorbothane® isolation throughout — driver, enclosure, and floor interface
Designed for seamless 2-channel integration.
Specifications
Performance
| Specification | Details | Notes |
|---|---|---|
| Impedance (per coil) | 3.80 ohm | DCR |
| Coil Configuration | Single voice coil | |
| Sensitivity | 96.0 dB | 2.83v/1m, 2π anechoic |
| Max SPL (Peak) | 137.6 dB | 1m, 2π, anechoic |
| Max SPL (Continuous) | 134.6 dB | 1m, 2π, anechoic |
| Frequency Response (-3dB) | 28.7Hz – 343Hz | No DSP |
| Frequency Response (-3dB) | 23.7Hz – 343Hz | With Linkwitz Transform |
| Low Frequency Extension (-3dB) | 23.70Hz | With Linkwitz Transform |
| Low Frequency Extension (-6dB) | 17.00Hz | With Linkwitz Transform |
| Low Frequency Extension (-10dB) | 9.70Hz | With Linkwitz Transform |
| Cone Breakup Frequency | 409Hz | |
| Xmax | 32 mm / 1.26 in | One way, 82% BL |
| Group Delay at f3 | 11.8 ms | With Linkwitz Transform |
| System Qtc | 0.6 | With Linkwitz Transform |
| Enclosure Alignment | Sealed | |
| Low Frequency Rolloff | 12dB/oct |
CTA 2010 data (preliminary)
| Frequency (Hz) | Amp Voltage (RMS) | 1m Peak | 2m Peak | 2m RMS | THD |
|---|---|---|---|---|---|
| 20 Hz | 42v | 112.5 dB | 106.5 dB | 103.5 dB | 2.16% |
| 25 Hz | 42v | 117.6 dB | 111.6 dB | 108.6 dB | 1.45% |
| 31.5 Hz | 65v | 125.3 dB | 119.3 dB | 116.3 dB | 1.61% |
| 40 Hz | 97v | 130.4 dB | 124.4 dB | 121.4 dB | 3.74% |
| 50 Hz | 65v | 126.7 dB | 120.7 dB | 117.7 dB | 1.01% |
| 63 Hz | 140v | 131.6 dB | 125.6 dB | 122.6 dB | 2.74% |
| 80 Hz | 140v | 131.0 dB | 125.0 dB | 122.0 dB | 1.88% |
| 100 Hz | 140v | 130.5 dB | 124.5 dB | 121.5 dB | 2.31% |
| 125 Hz | 140v | 129.8 dB | 123.8 dB | 120.8 dB | 3.35% |
| 160 Hz | 140v | 126.9 dB | 120.9 dB | 117.9 dB | 0.97% |
| 200 Hz | 140v | 123.1 dB | 117.1 dB | 114.1 dB | 0.55% |
Design
| I/O | Binding Post |
|---|---|
| Customization Options | Custom color, configured for stacking (up to 3 per stack), custom umbilical length |
| Integrated Proprietary Technologies | Direct voice coil temperature measurement, underhung magic radio, super special 6 layer enclosure with custom damping and mass loading, single point driver mounting, zero fastener enclosure, extensive driver vibration isolation |
| Patents | TBD |
| Mounting | Sits on custom vibration isolation feet. Multiple units may be stacked with custom enclosure insert. |
| Warranty (Default / With Registration) | 3 years / 5 years |
| Dimensions (Metric) | 521.2 mm × 567 mm × 551.2 mm |
| Dimensions (Imperial) | 21.7 in × 22.3 in × 21.7 in |
| Shipping Dimensions (Crated, Imperial) | TBD |
| Weight (Net, Assembled) | 325 lbs |
| Weight (Gross, Shipping) | 350 lbs |

