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The Hifonics HFX8D4 is an 8-inch car subwoofer with dual 4-ohm voice coils, so it can be wired to a 2-ohm or 8-ohm load depending on the amplifier. It handles 125 W RMS and 250 W peak with 85 dB sensitivity, which makes it easy to drive from modest power. A 4-inch mounting depth and 7.28-inch cutout let it fit tight spaces like truck cabs and powersports enclosures. It is a budget-minded small-format driver rather than a deep-bass specialist, and its modest excursion limits output compared with larger or higher-power 8-inch subs.
In stockSold by SpreetailReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
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Lowest price we've seen: $44.99 on Nov 9 at Lowe's. Tracked across 2 stores since Nov 9.
Owner feedback on the HFX8D4 is limited, but what exists is generally positive for the money. Buyers describe it as a solid small sub for tight installs and low-power setups, not a competition driver.
The HFX8D4 is an 8 in subwoofer for car and powersports installations, with a dual 4-ohm voice-coil design for wiring flexibility. It handles 125 W RMS and 250 W maximum power. With 85 dB sensitivity, the subwoofer converts amplifier power into sound efficiently. The driver fits small sealed or medium to large vented boxes, allowing enclosure selection based on the build and desired configuration. A heavy-gauge, powder-coated steel basket supports the moving assembly. The pressure-treated foam surround and integrated one-piece poly-cotton spider guide cone movement, while the vented aluminum former and back venting path help dissipate heat during operation. Spade-style terminals provide a defined connection point for speaker wiring. The 8.23 x 8.23 x 4 in overall dimensions, 4 in mounting depth, and 7.28 in cutout diameter support measurement before fitting. This subwoofer is intended for vehicle audio applications where dual voice coils and enclosure type are key system-planning considerations.
