Ground Zero Iridium GZIW 10XSPL-D2 10" 500W RMS Dual 2-Ohm SPL Car Subwoofer (700W Max)

The Ground Zero Audio Iridium GZIW 10XSPL-D2 (MPN: GZIW 10XSPL-D2 / GZIW10XSPL-D2) is a high-efficiency 10-inch (25 cm / 250 mm) daily SPL car subwoofer engineered in Germany to deliver big excursion and solid cast-basket durability at an entry-level price point. Rated at 500 Watts RMS / 700 Watts SPL (400W–700W recommended amplifier power) with Dual 2-Ohm (2x 2-Ohm) voice coils, a 63 mm (2.5″) copper voice coil, and 25 mm (0.98″) Xmax, the Iridium GZIW 10XSPL-D2 upgrades any daily driver with hard-hitting bass.

Key Features & Acoustic Engineering

• 500W RMS / 700W SPL Power Handling: Oversized 63 mm (2.5″) copper voice coil handles 400W to 700W of daily amplifier power without thermal compression.
• Honeycomb-Reinforced Paper Cone & Cast Aluminum Basket: Built on a solid die-cast aluminum basket with a honeycomb-reinforced paper cone and 3D-embossed IMPP dust cap—rare features in this price class.
• 25 mm (0.98″) Long-Stroke Excursion: High-roll compound surround paired with a 2-layer Polycot-Conex spider and Klippel®-optimized motor structure for clean, punchy low-end output.
• Dual 2-Ohm (D2) Wiring Flexibility: Wire a single GZIW 10XSPL-D2 in parallel to a 1-Ohm final load (or 4-Ohm series), or wire two GZIW 10XSPL-D2 subwoofers to a 2-Ohm final impedance.

Recommended Amplifier & Enclosure Pairing

• Amplifier Match (400W–700W RMS): Pair a single GZIW 10XSPL-D2 wired to 1 Ohm (or a dual-10″ setup at 2 Ohms) with a compact monoblock from our Ground Zero Amplifiers collection.
• Enclosure Fitment Specs: Ideal for compact vented/ported or sealed 10-inch enclosures (9.06″ / 230 mm cutout diameter; 5.79″ / 147 mm mounting depth; 0.81 cu. ft. / 22.8 L Vas).
• Explore More Ground Zero Subwoofers: Compare across our full Ground Zero Subwoofers catalog.

Technical Specifications & Thiele-Small Parameters

Authorized US Ground Zero Audio Dealer & Custom Installation in Toledo, OH: Ships fast from TDS Car Audio (6540 Central Ave, Suite O, Toledo, OH 43617). Local subwoofer box builds and professional installation available across Toledo, Maumee, Perrysburg, Sylvania, Holland, Bowling Green, and Southeast Michigan. Call (419) 376-6140 for assistance.