Massive Audio GTR Series 8" Subwoofer

The Massive Audio GTR Series 8" Subwoofer delivers serious bass from an 8-inch chassis, built for car audio enthusiasts who demand high output and durable construction thanks to dual stacked high-flux Y30 120 oz magnets and a heavy gauge steel basket.

• Size: 8" — compact footprint designed for tight mounting spaces while still delivering strong low-end extension.
• RMS Power Handling: 200–600 W RMS (400 W RMS ideal) — continuous power range indicating the wattage the woofer can handle from an amp without clipping, with 400 W recommended for balanced performance.
• Peak Power: 800 W — transient capability for musical peaks without damage.
• Cone: Textured Non-Pressed Pulp with Resin — provides stiffness and damping to control cone breakup and deliver cleaner bass.
• Voice Coil: 1.5" Dual 4 Ω — dual voice coils enable flexible wiring options and impedance matching for amplifiers.
• Surround: Custom High Roll Foam with MASSIVE Logo — maintains diaphragm alignment under high excursion and adds durability.
• Magnet: 120 oz dual stacked high-flux Y30 strontium ferrite magnets — large magnetic assembly for strong, consistent magnetic field and bass control.
• Terminals: Terminal Case with Flexible Pure Copper Wire — robust, low-resistance connections for high current signals.
• Basket: Heavy Gauge Steel Basket with Industrial Texture Painting — rigid frame to resist flex under heavy bass demands.
• Impedance: Dual impedance with a 2" hi-temp voice coil; Made in the USA — flexible wiring options and quality construction.
• X-Max: 12.5 mm — excursion capability indicating how far the cone can travel for deep bass before distortion.
• SPL: 82.5 dB — efficiency rating showing how loud the driver can get with a given input power.
• Fs: 39.9 Hz — resonance frequency informing the low-end capability when paired with an appropriate enclosure.
• Enclosure options: Ported box dimensions 9.6"H x 15"D x 10.8"W; Sealed box volume 0.5 ft³ — approved enclosure configurations and their approximate internal volumes.

In a real car build, this woofer suits high-power, mid-to-large trunk installations or custom enclosures where deep, controlled bass is the aim. The dual impedance and 2" hi-temp voice coil provide wiring flexibility to match a range of amplifiers, while the 120 oz magnet and steel basket keep the moving assembly rigid under demanding excursion. With a 12.5 mm X-Max and an Fs near 40 Hz, it delivers meaningful low-end extension in properly sized enclosures, and the ported or sealed options give you install versatility without sacrificing performance. The Terminal Case and pure copper wiring ensure reliable signal transfer during heavy bass transients.