The answer to the question, “It has a deep resonance.”

10-inch subwoofer/DVC
The ARC series subwoofer is a highly balanced model designed by top US acoustic engineers that combines high sound quality and high output.
Delivering massive, deep bass and smooth response while being designed to make it easy to secure installation space. Ideal for small to medium-sized enclosures, its flexibility to be compatible with infinite baffles is also attractive.

Designed with a high heat-resistant voice coil, rubber surround, and high-rigidity steel basket for safe use over long periods of time.
An all-around subwoofer that meets a wide range of needs, from entry-level users to discerning listeners.

Mounting Depth: 5-1/2"
Cutout Diameter: 9-1/8"
Recommended Enclosure: Sealed (0.65 min - 0.90 max cu ft)
Impedance Configuration: Dual 2Ω / Dual 4Ω
High Temperature Resistant Black Anodized Voice Coil
Integrated Molded Rubber Surround
Stamped Steel Basket
Flat Spider Tinsel Reeds Built-in