Passive , 26cm (10") subwoofer pair , Terra system expansion
Gravity
Mass creates gravity...So does Terra
The work doesn’t stop at 40Hz, neither should you.
Signal active
System Freq.
30Hz linear (F6 at 20Hz)
System SPL
112dB @ 1kHz
Crossover
80Hz, zero-phase LR4
Driver
26cm PuriFi PTT10.0W96-08
Design
Passive , powered from Terra rear panel
Product Photography
The same standard.
At subwoofer scale.
Technical Foundation
Not an add-on. The other half.
Terra reaches 40Hz linear. For most work, that’s enough. For film, game audio, immersive formats, or rooms where the low end actually matters, it isn’t. Gravity closes that gap, extending the system to 30Hz linear without touching the phase, the imaging, or the translation you already trust.
It connects to Terra’s rear panel and disappears into the system. No separate amplifier to match levels with. No bass management crossover to configure. No phase alignment to guess at. Terra’s DSP handles all of it. You hear the low end, not the integration.
Add Gravity and the system reaches 30Hz linear, F6 at 20Hz. System headroom increases to 112dB @ 1kHz, 106dB @ 50Hz. The rest of the picture doesn’t change, because nothing upstream of the crossover does.
Driver Technology
26cm PuriFi PTT10.0W96-08. Designed for exactly this.
The same hybrid motor architecture and symmetrical surround geometry as Terra’s woofer, scaled for dedicated low-frequency duty. Custom concave aluminum diaphragms maximize bending stiffness where these drivers operate. Uneven stiffness creates harmonic distortion. Asymmetric excursion creates compression. This design eliminates both, even at the long throws required="required" for deep bass.
The result is a subwoofer that tells you what’s in the recording, not what the driver wants to add. When you hear bass on Gravity, it’s in the session.
System Integration
One control point. Zero compromises.
Gravity contains no amplification and no electronics. Everything, power, crossover, time alignment, calibration, comes from Terra’s rear panel and Terra's DSP. That’s not a cost reduction. It’s the reason the two systems behave as one. There is no seam in the crossover because there is no independent system on either side of it. You can access Gravity specific controls through the Houston software application.
Over-the-air calibration updates applied to Terra extend to the complete system. Your Terra + Gravity improves over time, because ours does.
Performance Measurements
We publish everything.
Make of it what you will.
Every Gravity is measured and calibrated before it ships.
Gravity RMS
Gravity THD
Gravity Phase
Full Specifications
Every number,
verified.
Performance (integrated with Terra)
System Frequency Response
±1.5dB, 30Hz–30kHz (linear to 30Hz, F1 at 30Hz)
System Low Freq. Extension
F6 at 20Hz
System Max SPL @ 1m
112dB @ 1kHz
System Max LF SPL @ 1m
106dB @ 50Hz
System Phase Response
±15°, 30Hz–30kHz
Integration Crossover
80Hz zero-phase LR4 digital
Driver
Subwoofer Driver
26cm (10.2”) PuriFi PTT10.0W96-08
Diaphragm
Custom concave aluminum
Design
Type
Passive, no internal amplification or electronics
Power Source
Terra rear panel amplification
Gain Control
User-adjustable delay compensation and gain trim
LFE Input
Discrete LFE input available
Compatibility
Designed exclusively for Terra, requires Terra for operation
Physical
Dimensions
305mm H × 215mm W × 305mm D
Configuration
Side-firing, shallow depth for on-wall mounting
Weight
20.4kg (45 lbs) per subwoofer
Mounting
200×200 VESA, M6 fasteners
Baffles
19mm solid aluminum, front and rear
Warranty
6 years
Shipping Dimensions
711mm H × 607mm D × 508mm W (28” × 24” × 20”)
Shipping Weight
45.4kg (100 lbs)
The Complete System
Terra + Gravity.
The full picture.
Complete System
Terra + Gravity
From 30Hz. Right decisions.
Terra handles 80Hz to 30kHz. Gravity takes it down to 30Hz linear. One calibration, one control point, one picture. The low end you hear is the low end that’s there.
View the system →Get Gravity
Your next great project
starts here.
Precision. Not Prestige.
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