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The Hifonics Alpha Series monoblock is a compact Class-D subwoofer amplifier rated at 2000 watts into 1 ohm, 1000 watts into 2 ohms and 500 watts into 4 ohms. It carries a full set of bass tools: a variable 0–250 Hz low-pass filter, a 10–50 Hz subsonic filter, 0–12 dB of bass boost at 45 Hz, variable phase and a 0.2–6 V input range. That feature set is broader than many budget monoblocks, which often skip phase shift or a subsonic filter. It suits drivers who want strong sub power from a small chassis and will feed it a 1-ohm load. Hifonics rates its output at 14.4 V, so real-world power depends on your electrical system.
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Lowest price we've seen: $339.99 on Nov 13 at Amazon. Tracked across 1 store since Nov 13.
Owner feedback on Hifonics Alpha monoblocks is mixed. Many praise the output for the size and the bass controls, while others report that the amp runs hot and that the rated power is optimistic without electrical upgrades.
The Hifonics Alpha Series is a compact monoblock car audio amplifier that uses Super D-Class technology. It has one channel and is stable at 1 ohm. It delivers 2000 watts at 1 ohm, 1000 watts at 2 ohms and 500 watts at 4 ohms.
It has an electronic crossover with a variable 12 dB per octave low-pass filter from 0 Hz to 250 Hz. Bass EQ, a bass boost, a variable subsonic filter and variable phase shift let you tune the sound. It accepts speaker-level audio inputs.
