Gladen SIGMA SM 50

The Gladen SIGMA SM 50 is a high-quality 50 mm midrange driver and full-range speaker that combines state-of-the-art speaker technology with an innovative mounting system. Designed for demanding car audio applications, the SIGMA SM 50 delivers exceptionally detailed, dynamic, and low-distortion music reproduction.

The black anodized aluminum diaphragm, combined with the powerful neodymium magnet system, enables precise sound reproduction up to over 20,000 Hz. The vented voice coil former made of fiberglass mesh reduces distortion and thermal compression, while the low-loss suspension with a Conex centering spider ensures outstanding detail resolution and dynamics.

Thanks to the newly developed mounting system with a convenient click-lock mechanism, the speaker can be integrated into both custom installations—such as A-pillars—and tight factory mounting locations. Two different protective grilles allow for a visually appealing match with the vehicle’s interior.

With a power handling capacity of 80 watts RMS and a frequency response extending beyond 20 kHz, the SIGMA SM 50 is particularly well-suited for high-quality active multi-way systems and demanding sound-quality installations.

Technical Specifications

• Manufacturer: Gladen

• Model: SIGMA SM 50

• Speaker Type: Midrange / Full-range speaker

• Speaker size: 50 mm / 2 inches

• Rated Power Handling (RMS): 80 watts

• Maximum power handling: 120 watts

• Rated power handling with active crossover: 300 Hz / 24 dB per octave

• Nominal impedance: 4 ohms

• DC resistance (Re): 3.20 ohms

• Frequency response: Up to over 20,000 Hz

• Recommended high-pass filter: 300 Hz / 24 dB per octave

• Resonance frequency (Fs): 135 Hz

• Mechanical Grade (Qms): 7.60

• Electrical quality (Qes): 0.58

• Overall Quality (Qts): 0.54

• Equivalent air volume (Vas): 0.30 liters

• Effective diaphragm area (Sd): 15.6 cm²

• Moving diaphragm mass (Mms): 1.60 g

• Sensitivity (1 W / 1 m): 84.0 dB

• Sound pressure level (2.83 V / 1 m): 86.9 dB

• Diaphragm material: Black anodized aluminum

• Dust Cap: Aluminum Dust Cap

• Diaphragm surround: Rubber

• Centering spider: Conex

• Voice coil diameter: 19 mm

• Voice Coil Carrier: Ventilated Fiberglass Fabric

• Magnet system: Neodymium

• Speaker basket: Flow-optimized polymer basket

• Connection Type: Sturdy Plug-In Terminals

• Mounting system: Mounting frame with click-lock mechanism

• Outer diameter of mounting frame: 65 mm

• Required hole diameter: 51 mm

• Chassis height according to the dimensional drawing: 28 mm

• Height of the mounting frame with grille: 7.5 mm

• Grille finishes: Brushed silver or black chrome
  
  

What's Included

• Gladen SIGMA SM 50 Midrange / Full-Range Speaker

• Mounting frame with click-lock mechanism

• Hexagonal Protective Grille

• OEM design grille in the selected finish (brushed silver or black chrome)
  
  

Available Options

• GA-SM-50-silver: With a brushed silver OEM design grille

• GA-SM-50-black: With a black chrome-plated OEM-style grille