Shipping Estimate
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- USA
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Ships within 48 hours · Estimated delivery Jul 13 - Jul 18
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Description
Massive Audio GTR64 6.5” GTR Series 400W RMS | 600W Max Car Subwoofer Dual 4-Ohm w/ GrillMassive Audio GTR64 6. 5 GTR Series Subwoofer 400 W RMS 600 W Peak Dual 4 (1. 5 Hi Temp Voice Coil) Compact yet powerful, the GTR64 delivers clean, impactful bass in tight spaces. Built with a dual 4 high temp coil, strong motor assembly, and reinforced cone and basket, it's engineered for durable, punchy performance. Key Features Power Handling (RMS): 400 W Peak Power: 600 W 1. 5 dual 4 high temperature voice coils (Made in the USA) Heavy gauge steel
Massive Audio GTR64 – 6.5″ GTR Series Subwoofer – 400 W RMS / 600 W Peak – Dual 4 Ω (1.5″ Hi-Temp Voice Coil)Compact yet powerful, the GTR64 delivers clean, impactful bass in tight spaces. Built with a dual 4 Ω high-temp coil, strong motor assembly, and reinforced cone and basket, it's engineered for durable, punchy performance.
Key Features
- Power Handling (RMS): 400 W
- Peak Power: 600 W
- 1.5″ dual 4 Ω high-temperature voice coils (Made in the USA)
- Heavy-gauge steel basket with industrial-textured finish
- Dual-stacked Y30 65 oz strontium ferrite magnet
- Textured pulp cone with resin reinforcement and red-stitch surround
- Custom high-roll foam surround with MASSIVE logo
- Reinforced terminal case with copper wiring and woven tinsel leads
- X-Max: ~10 mm; Sensitivity: ~79.5 dB; Fs: ~55.8 Hz
- Enclosure recommendations: sealed ~0.35 ft³; ported 7.9″H × 15″D × 8.7″W (1.5″ × 8″ port)
- Mounting depth: ~5.43″; Cutout: ~5.79″; Weight: ~11 lb
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 2388 reviews
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Product Reviews
★★★★★ 5
I love it!
Color: Navy Blue, Size: X-Large
Good quality materials, perfect fit, looks great!! Would definitely buy other colors.
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Reviewed in the United States on February 27, 2026
★★★★★ 4
Quality item
Color: White, Size: X-Large
Not too thick and not too thin, the quality is good I just wish the neck fit a little firmer and it would be 5stars
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Reviewed in the United States on March 4, 2026
★★★★★ 5
Well made and comfortable
Color: White, Size: Large
The turtleneck is well made and very comfortable. It's good looking too! I have a similar turtleneck (from an unknown maker - tag is missing) that I've owned for more than 40 years. It will likely outlast me!
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Reviewed in the United States on February 1, 2026
★★★★★ 5
Great fit.
Color: White, Size: Large
Fit as described, fast shipping, great experience.
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Reviewed in the United States on March 24, 2026
★★★★★ 3
BO - stinky!
Color: White, Size: Medium
Shirt itself fits great and has a soft almost velour feel to it. Ribbing nice and not itchy. However, it arrived with the most disgusting baked-in body odor smell, as if someone had sweated heavily in it. Unsure if it’ll be able to be laundered out.
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Reviewed in the United States on October 29, 2025