Gladen Sigma SSWX12

The Gladen Sigma SSWX12 is a high-performance 30 cm (12-inch) subwoofer designed specifically for demanding car audio systems requiring high power reserves and powerful low-frequency reproduction. As a particularly robust model in the Sigma series, it combines a massive, high-performance driver with a sturdy fiberglass cone and a long-throw voice coil. This enables powerful, precise bass reproduction even at high volume levels.

The robust design, featuring an aluminum basket, a 65-mm voice coil, and a durable foam surround, ensures high mechanical stability and reliable power handling. With a linear cone excursion of ±15 mm, the SSWX12 moves large volumes of air and is ideal for performance-oriented bass systems.

Thanks to its 2 × 2-ohm dual voice coil, the subwoofer can be configured to operate at either 1 ohm or 4 ohms. This allows for flexible pairing with a variety of high-power amplifiers. The SSWX12 is suitable for both sealed and bass-reflex enclosures and offers an impressive combination of low-frequency extension, sound pressure, and control.

Technical Specifications

• Manufacturer: Gladen

• Model: Sigma SSWX12

• Product Type: High-Performance Car Audio Subwoofer

• Speaker size: 30 cm (12 inches)

• RMS Power Handling: 800 watts

• Maximum power handling: 1,600 watts

• Impedance: 2 × 2 ohms

• Total impedance in a parallel circuit: 1 ohm

• Total impedance in series connection: 4 ohms

• Voice coil diameter: 65 mm (2.5 inches)

• Voice coil height: 40 mm

• Linear diaphragm stroke (Xmax): ±15 mm

• Diaphragm material: fiberglass

• Bead material: foam

• Backing: 7-inch poly-cotton blend

• Voice coil former: Aluminum

• Dust cap: Polypropylene (PP)

• Basket material: aluminum

• Recommended tank volume: 28–32 liters

• Suitable enclosure types: Sealed and bass-reflex
  
  

Thiele-Small parameters

• Resonance frequency (Fs): 32 Hz

• DC resistance (Re/Rdc): 1.8 ohms per voice coil

• Mechanical Quality (Qms): 7.08

• Electrical Quality (Qes): 0.53

• Total quality (Qts): 0.50

• Equivalent air volume (Vas): 28.4 liters

• Moving mass (Mms): 295 g

• Effective membrane area (Sd): 531 cm²

• Suspension compliance (cm/N): 0.07 mm/N

• Force factor (BL): 21.2 Tm

• Efficiency (η): 0.21%

• Sound pressure level (SPL): 88.5 dB (2.83 V/1 m)
  
  

Dimensions

• Outer diameter: 330 mm

• Installation diameter: 283 mm

• Installation depth: 172 mm
  
  

What's Included

• 1 × Gladen Sigma SSWX12 Subwoofer (30 cm / 12 inches)