TNT-10S (Open-Box)

Complementing the robust cone is a high roll surround. This critical component is engineered to allow for generous amounts of excursion. The TNT series boasts an impressive Xmax of 2 inches (50.8mm). This substantial excursion capability enables the subwoofer to move a larger volume of air, which is essential for producing the deep, impactful bass frequencies that users crave.

The voice coil itself is a critical component for both sound generation and thermal management. TNT subwoofers feature a 2-inch, 4-wound voice coil made with copper wire. Crucially, this coil is wound on an aluminum bobbin (former). The choice of aluminum is deliberate and significant. The use of aluminum prevents hotspots on the voice coil resulting in superb heat conductivity that makes the entire voice coil one big heat sink. This is a marked improvement over materials like cellulose (cardboard), Kapton®, or fiberglass, which are sometimes used in voice coil formers but do not offer the same level of thermal efficiency. The aluminum bobbin works in concert with the triple vent system to dissipate heat rapidly.

TNT subwoofers employ double thick high density magnets. This substantial magnetic motor provides the force needed to control the cone’s movement precisely, even at high volumes and during demanding low frequency passages. This allows the woofer to play louder while still sounding taunt and crisp. To complete the robust design, the magnet is covered with an aesthetic rubber sleeve, providing protection and a clean look.

A key innovation is Earthquake’s proprietary triple vent scheme, designed to enhance the voice coil cooling by maximizing airflow. This sophisticated system is not a single vent but a combination of strategies: pole piece venting, voice coil radial venting and spider venting. By creating multiple pathways for heat to escape and cool air to circulate, the triple vent system effectively manages thermal stress. The direct benefit is that it allows you play louder and longer, ensuring consistent performance without succumbing to heat-induced compression or damage.

A detail that speaks to the robust construction is the use of stitched tinsel leads. Tinsel leads are the flexible wires that carry the signal from the terminals to the voice coil. By stitching them into the spider (the corrugated suspension component), they are prevented from slapping against the cone or breaking during periods of high excursion. This enhances the subwoofer’s long-term durability, especially when subjected to the rigors of powerful bass.

All TNT subwoofers are equipped with spring loaded terminals for ease of installation. This feature ensures an easy and secure connection for speaker wires, accommodating various wire gauges and eliminating the need for specialized tools or connectors. This is a practical benefit for both DIY enthusiasts and professional installers, streamlining the setup process.