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Near Field Studio Grade Subwoofers
ServoBass® specializes in crafting cutting-edge audio solutions for professionals. Our servo-controlled subwoofers redefine studio sound, offering unmatched clarity and precise stereo imaging. Designed to deliver the essential bottom octave in a compact, desktop-friendly form that minimizes room reflection effects, our subwoofers seamlessly complement any near-field monitors by enhancing the critical 30–60 Hz range with exceptional clarity, low distortion, and precise stereo imaging. Experience the difference with ServoBass®.
"LIKE NOTHING YOU'VE HEARD BEFORE"

Design Considerations
Most small near-field monitors lack bass reproduction in the 30–60 Hz range to avoid bass-midrange intermodulation, which degrades clarity and imaging. While common subwoofers use ported enclosures to enhance bass, they often result in overhanging, sustained, “boxy” bass transients.
ServoBass’s compact 8x8x8-inch near-field subwoofers address these issues with a relatively high crossover frequency of 100 or 200 Hz. Designed for desktop use with monitors placed on top, they ensure perfect wavefront alignment at ear level.
Using 4th-order Linkwitz-Riley crossovers, these subwoofers integrate seamlessly with near-field monitors, ensuring smooth phase transitions at the crossover frequency for a flat response. Motion Feedback (MFB) technology delivers tightly controlled bass transients, eliminating the drawbacks of resonant ported designs.
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Inside our ZRS-1 Subwoofers
The ZRS-1 Plate Amplifier combines an MFB control circuit, a high-power Class D amplifier, and a robust switching power supply. MFB enables a flat frequency response with real-time voice coil dynamics control, while real-time temperature monitoring prevents overheating damage.
Key Features:
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Subwoofer volume control
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Selectable 100 Hz and 200 Hz crossover options
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Full-range 30–400 Hz response for user-defined crossover
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Bypass mode routes the input signal directly to monitors while muting the subwoofer
The ZRS-1 features a 6.5" driver with a custom-designed sensor mounted on its voice coil former, housed in an 8x8x8-inch enclosure designed to fit under most near-field monitors.
Enhancing Studio Sound with Compact Near Field Subwoofers
Revolutionize your studio setup with ServoBass’s cutting-edge near-field subwoofers. Our compact designs optimize sound quality by minimizing room reflection effects and seamlessly integrating with your existing monitors. Relieving your monitors from the high-excursion bass range ensures crystal-clear audio and precise stereo imaging for a professional studio experience.
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Click the button to view our subwoofers' performance test results.
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Additional Reading
The linked articles explore the history of passive and active bass enhancement methods and the design of the ZRS-1 desktop subwoofer. Measuring 8x8x8-inch, the ZRS-1 complements small studio monitors by delivering powerful, tightly controlled bass in the 30–60 Hz range using Motion Feedback dynamic control of the woofer's voice coil.
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About Our Subwoofers in the Sound on Sound newsletter
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Read about our subwoofers in an article featured in AudioXpress​
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About our CEO Zami Schwartzman in AudioXpress​
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Motion Feedback Desktop Subwoofers in AudioXpress
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