Fi Audio MT Series 12" Subwoofer Dual 1 Ohms

MT Series Competition Subwoofer

Built for extreme output and uncompromising performance, the MT Series is engineered for serious competitors and hardcore bass enthusiasts who demand maximum power handling, control, and durability.

At the core of this subwoofer is a massive 4-inch voice coil designed to handle intense thermal loads while maintaining consistent performance under extreme conditions. The motor structure is precision-engineered using advanced modeling to maximize magnetic efficiency, delivering strong, controlled output across the entire frequency range.

The triple high-grade magnet assembly, combined with a solid pole structure, aluminum sleeve, and compression cap, provides excellent heat management and improved efficiency during high-power operation. This design helps maintain performance stability even during long, demanding sessions.

A reinforced moving assembly featuring a heavy multi-spider suspension and high-strand lead wires keeps the cone stable during extreme excursion, reducing distortion and improving reliability at high output levels. The optimized surround geometry increases usable cone area while maintaining control, allowing for deeper lows and greater overall output.

Whether you’re building a competition system or a high-power daily setup, the MT Series delivers powerful low-frequency response with excellent control and clarity.

Typical build time: 10–15 business days

Advanced Cooling & Inductance Control

Stage 1 Cooling
Includes a precision aluminum pole sleeve that helps stabilize inductance during cone movement while improving heat transfer away from the voice coil. This helps reduce distortion and maintain consistent performance.

Stage 2 Cooling
Adds an aluminum pole cap to further improve thermal management and reduce inductance changes as the coil moves. This increases efficiency, improves output consistency, and reduces stress on amplifiers.

Key Features

• Dual 1 Ohm or Dual 2 Ohm configurations

• Heavy-duty cast aluminum basket

• Reinforced pulp fiber cone

• Wide dual-layer foam surround

• Heavy-duty stitched terminals

• High strand count lead wires

• Advanced motor design for high flux density

• 4” multi-layer voice coil

• Triple stacked magnet structure

• Carbon fiber dust cap

• Multi-spider suspension system

• Precision machined components

Performance Highlights

• Designed for extreme excursion capability

• High thermal capacity for long play sessions

• Strong low-frequency output with excellent control

• Built for competition and high-power daily systems

Available Sizes

12″ • 15″ • 18″

Each model maintains the same extreme excursion capability and high power handling, with enclosure recommendations varying by size.

Recommended Enclosure Sizes (Ported)

• 12″: 1.8 – 2.5 cu ft

• 15″: 3 – 5 cu ft

• 18″: 5 – 8 cu ft