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The Hifonics ZD-750.4D is a compact four-channel Class-D car amplifier rated at 100W per channel at 4 ohms, 175W per channel at 2 ohms, and 375W per bridged pair at 4 ohms. Its full-range design lets it drive front and rear speakers or bridge down to two channels for subwoofers. Class-D operation keeps it small and cool-running compared with older Class-AB four-channels, and the 2-ohm stability gives headroom for component sets. It suits budget-minded builds that want one box to run a whole system, though it sits below premium four-channels on power and refinement.
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Lowest price we've seen: $125.99 on Nov 12 at Hifonics. Tracked across 13 stores since Nov 12.
The Hifonics ZD-750.4D is a compact 4-channel full range Class-D car amplifier from the Zeus Delta series. It delivers up to 750 watts of maximum power. It can run front and rear speakers, component systems, or bridged channels for more bass output.
The amplifier uses a PWM MOSFET power supply and a low noise preamplifier circuit. Its aluminum heat sink helps manage heat. Protection circuitry with LED indicators covers overload and speaker protection. It is 2 ohm stable and has a signal-sensing turn-on feature to simplify installation.
An onboard electronic crossover has variable high-pass and low-pass filters from 50Hz to 250Hz, and there is built-in bass control. You can use all four channels for a complete speaker system or bridge channels where more power is needed.
