Ground Zero Iridium GZIW 12XSPL-D2 12" 600W RMS Dual 2-Ohm SPL Car Subwoofer (1000W Max)

The Ground Zero Audio Iridium GZIW 12XSPL-D2 (MPN: GZIW 12XSPL-D2 / GZIW12XSPL-D2, EAN/GTIN: 4037072023671) is a high-excursion 12-inch (30 cm / 300 mm) daily SPL car subwoofer engineered in Germany for deep, loud bass at an accessible price point. Rated at 600 Watts RMS / 1,000 Watts SPL (500W–1,000W recommended amplifier power) with Dual 2-Ohm (2x 2-Ohm) voice coils, a 63 mm (2.5″) copper voice coil, and 34 mm (1.34″) Xmax, the Iridium GZIW 12XSPL-D2 delivers high-efficiency 86 dB output for daily trunk and SUV bass builds.

Key Features & Acoustic Engineering

• 600W RMS / 1,000W SPL Power Handling: Oversized 63 mm (2.5″) copper voice coil handles 500W to 1,000W of daily amplifier power with strong thermal reliability.
• 34 mm (1.34″) Long-Stroke Excursion: High-roll compound surround paired with a 2-layer Polycot-Conex spider and Klippel®-optimized motor reaches down to a 32.5 Hz resonance frequency (Fs).
• 3D Honeycomb-Reinforced Paper Cone: Rigid honeycomb-textured paper cone and 3D-embossed IMPP dust cap mounted in a resonance-free Ground Zero steel basket.
• High 86 dB Sensitivity & Dual 2-Ohm (D2) Wiring: Wire a single GZIW 12XSPL-D2 in parallel to a 1-Ohm final load (or 4-Ohm series), or wire a pair of 12″ subwoofers to a 2-Ohm or 0.5-Ohm final impedance.

Recommended Amplifier & Enclosure Pairing

• Amplifier Match (500W–1,000W RMS @ 1-Ohm): Pair a single GZIW 12XSPL-D2 wired to 1 Ohm with a monoblock amplifier from our Ground Zero Amplifiers collection.
• Enclosure Fitment Specs: Optimized for vented/ported and sealed 12-inch subwoofer boxes (11.22″ / 285 mm cutout diameter; 6.38″ / 162 mm mounting depth; 1.43 cu. ft. / 40.4 L Vas).
• Explore More Ground Zero Subwoofers: Compare across our full Ground Zero Subwoofers lineup.

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). Custom subwoofer enclosures and professional installation available across Toledo, Maumee, Perrysburg, Sylvania, Holland, Bowling Green, and Southeast Michigan. Call (419) 376-6140 for support.