Earthquake 的 FF 重低音旨在為消費者提供預算和體積優化的重低音解決方案。

這些重低音佔地面積小、應用範圍廣、輸出令人難以置信，具有 400 瓦“A/B”類放大器、自動信號感應、低電平和高電平輸入和輸出、0 - 180° 相移以及 0 - 40Hz 分頻。

• Front firing design
• Single slot port for optimized bass output
• Front mounted volume control
• Built in 400-Watt Class "A/B" high efficiency power amplifier
• 12dB/Octave variable filter from 40 Hz to 180 Hz
• Automatic signal detection circuitry
• Status LED indicators
• Low level (RCA) audio inputs
• Line through (RCA) audio outputs 
• High level (high level) audio inputs
• Line through (high level) audio output
• 0 - 180° phase shift
• Also available in 6.5" and 12" models