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Massive Audio GTR Series Subwoofers – Built for Power, Designed for Precision
The GTR Series subwoofers by Massive Audio are engineered to deliver extreme performance with audiophile-level sound quality. Each subwoofer features a Textured Non-Pressed Pulp cone, reinforced with dual red stitching for enhanced durability, and a Custom High Roll Foam surround emblazoned with the MASSIVE logo for optimized excursion and control. This precision cone assembly is securely bonded to a rugged, heavy-gauge steel basket finished in an industrial-grade textured paint.
At the core of the GTR Series lies a pair of stacked, high-flux Y30 65oz Strontium Ferrite magnets that generate powerful magnetic force for deep, clean bass. The 1.5" high-temperature voice coil, proudly made in the USA, ensures consistent performance under extreme loads. A high-quality spider suspension system, combined with durable woven tinsel leads and flexible pure copper wiring, connects seamlessly to a custom terminal case, ensuring reliable signal transfer.
From construction to sound output, the GTR Series embodies Massive Audio’s commitment to premium quality, performance, and unbeatable value.
- Heavy gauge Steel Basket with Industrial Texture Painting
- Dual Stacked High Flux Y30 65oz Strontium Ferrite Magnets
- Dual Impedance / 1.5" Hi-Temp Voice Coil - Made in the USA
- Custom High Roll Foam with MASSIVE Logo
- Textured Non-Pressed Pulp with Resin
Size | 6.5" |
RMS Range | 200w-400w (300w RMS Ideal) |
Peak Power | 600w |
Cone | Textured Non-Pressed Pulp with Resin |
Voice Coil | 1.5" Dual 4 Ohm |
Surround | Custom High Roll Foam with MASSIVE Logo |
Magnet | 65oz |
Terminals | Terminal Case with Flexible Pure Copper Wire |
Basket | Heavy Gauge Steel |
Tinsel Leads | High-Grade Woven Round |
X-Max | 10mm |
SPL | 79.5dB |
FS | 55.8Hz |
Ported Box | 7.9"H x 15"D x 8.7"W / 1.5" x 8" Round Port |
Sealed Box | .35 ft3 |
Mounting Depth | 5.433" / 138mm |
Mounting Diameter | 6.929" / 176mm |
Mounting Cut Diameter | 5.787" / 147mm |
Net Weight | 11 Lbs. |

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