Grimm Audio SB1 Motion Feedback Subwoofer (Stereo Set)

The Grimm Audio SB1 is a groundbreaking subwoofer system featuring Digital Motional Feedback (DMF), a control technology adapted from Dutch high-tech engineering. By mounting an acceleration sensor on the cone and combining it with advanced digital processing and current drive, the SB1 achieves up to 30 dB reduction in distortion while maintaining full dynamic control. This innovation solves the long-standing issues of low-frequency resonance and distortion, offering bass performance that is exceptionally clean, accurate, and transparent.

With linear extension down to 20 Hz, the SB1 transforms any LS1 system into a fully phase-coherent three-way design. Paired with the LS1v2, LS1be, or even LS1a, it provides low distortion across the entire audio spectrum and redefines what true full-range monitoring means. A dedicated switch also allows the SB1 to integrate seamlessly with third-party systems, making the advantages of Digital Motional Feedback accessible beyond the LS1 ecosystem. Powered by a custom-modified woofer and a 500W Class-D amplifier, the SB1 delivers controlled, natural bass reproduction in stereo pairs that meet the highest professional standards.

Key Features

• Digital Motional Feedback (DMF) technology reduces distortion by up to 30 dB
• Linear bass extension down to 20 Hz for accurate low-frequency reproduction
• Transforms LS1 systems into a powerful, phase-coherent three-way design
• DSP-controlled frequency curve with optimized low-frequency performance
• Phase-corrected 70 Hz crossover integrated into LS1 DSP
• Modified aluminum woofer with integrated acceleration sensor for real-time feedback
• 500W Class-D amplifier for clean and powerful performance
• Mains outlet for LS1 reduces cable clutter
• Switchable mode allows integration with third-party loudspeaker systems

Specifications

• System Type: Stereo subwoofer set with Digital Motional Feedback technology
• Frequency Response: Linear down to 20 Hz
• Crossover: 70 Hz phase-corrected crossover (integrated with LS1 DSP)
• Driver: Modified aluminum woofer with acceleration sensor
• Amplification: 500W Class-D amplifier
• Technology: Digital Motional Feedback (DMF) with smart DSP and current drive
• Integration: Designed for LS1v2, LS1be, and LS1a; switch for third-party system use
• Outputs: Mains outlet for LS1 loudspeakers to minimize cable clutter