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 ohmDCR
Coil ConfigurationSingle voice coil
Sensitivity96.0 dB2.83v/1m, 2π anechoic
Max SPL (Peak)137.6 dB1m, 2π, anechoic
Max SPL (Continuous)134.6 dB1m, 2π, anechoic
Frequency Response (-3dB)28.7Hz – 343HzNo DSP
Frequency Response (-3dB)23.7Hz – 343HzWith Linkwitz Transform
Low Frequency Extension (-3dB)23.70HzWith Linkwitz Transform
Low Frequency Extension (-6dB)17.00HzWith Linkwitz Transform
Low Frequency Extension (-10dB)9.70HzWith Linkwitz Transform
Cone Breakup Frequency409Hz
Xmax32 mm / 1.26 inOne way, 82% BL
Group Delay at f311.8 msWith Linkwitz Transform
System Qtc0.6With Linkwitz Transform
Enclosure AlignmentSealed
Low Frequency Rolloff12dB/oct

CTA 2010 data (preliminary)

Frequency (Hz) Amp Voltage (RMS) 1m Peak 2m Peak 2m RMS THD
20 Hz42v112.5 dB106.5 dB103.5 dB2.16%
25 Hz42v117.6 dB111.6 dB108.6 dB1.45%
31.5 Hz65v125.3 dB119.3 dB116.3 dB1.61%
40 Hz97v130.4 dB124.4 dB121.4 dB3.74%
50 Hz65v126.7 dB120.7 dB117.7 dB1.01%
63 Hz140v131.6 dB125.6 dB122.6 dB2.74%
80 Hz140v131.0 dB125.0 dB122.0 dB1.88%
100 Hz140v130.5 dB124.5 dB121.5 dB2.31%
125 Hz140v129.8 dB123.8 dB120.8 dB3.35%
160 Hz140v126.9 dB120.9 dB117.9 dB0.97%
200 Hz140v123.1 dB117.1 dB114.1 dB0.55%

Design

I/OBinding Post
Customization OptionsCustom color, configured for stacking (up to 3 per stack), custom umbilical length
Integrated Proprietary TechnologiesDirect 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
PatentsTBD
MountingSits 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