The Zapco ST-501D SQ MINI is a compact Class D mono amplifier designed specifically to power subwoofers. Despite its miniature case, it delivers significant power, providing 180 W at 4Ω, 320 W at 2Ω, and up to 530 W when running at 1Ω. This performance is paired with a signal-to-noise ratio exceeding 100dB and low total harmonic distortion of less than 0.1%, ensuring a clean signal for your low-end frequencies. Its micro chassis measures 86 mm in width, 42 mm in height, and 206 mm in total length, making it easy to tuck away in tight spaces where a full-sized amplifier wouldn't fit. You can fine-tune the sound using the adjustable electronic low-pass filter, bass boost, and subsonic filter, while the linear RCA input and adjustable gain control allow for precise integration with your head unit. For those needing even more power, the unit is linkable, allowing you to strap two amplifiers together. A remote control regulator is also included, giving you the ability to adjust the bass levels from your seat.