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The HiFonics BG-1900.1D is a class D mono block amplifier built for driving subwoofers. It is rated at 475 watts RMS at 4 ohms, 950 watts at 2 ohms and 1900 watts at 1 ohm, so it is aimed at systems that need serious bass power from a single amp. It has a variable low-pass filter from 30 to 250 Hz, a phase control and two fuses, but no subsonic filter and no bridging. Against rival 1-ohm mono amps it is a straightforward, MOSFET-based design with a compact 12.75 by 8.25 inch footprint rather than a feature-heavy DSP amp.
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Lowest price we've seen: $203.99 on Nov 9 at Best Buy. Tracked across 1 store since Nov 9.
Owner feedback on the BG-1900.1D is limited, but it is generally described as a solid budget mono amp that delivers its rated power for subwoofer duty. Complaints tend to focus on heat and current draw when run at 1 ohm.
