• Rainbow compound-rubber W-surround, with low distortion and high excursion and linearity
• Aluminum crystal look cone, black anodized,aluminum-paper/compound for extreme depth
• Symmetric lead wire spider, to prevent coil wobbling
• Titan 37 mm diameter voice coil former with CCA coil wire, to reduce moving mass and low Rms
• Copper control rings, to optimize impedance and very low distorsions
• Aluminum-die-cast basket, designed for high linear excursion and optimized airflow
• Multi vented magnet system prevent thermal compression
• Speaker screw terminal for 8 mmSq speaker cables

Technical Specification

• Impedance: 4Ohm
• Handling Power: 180w
• Resonance frequency: 36Hz
• Frequency response: 33Hz-5kHz @18dB
• Vas: 19l
• Qts: 0.45
• Qms: 4.15
• Qes: 0.51
• Re: 3.6Ohm
• SPL 1W/1 Meter: 87dB
• Xmax +/-: 7mm
• Outer Diameter: 166mm
• Mounting Diameter: 143mm
• Mounting Depth: 78mm
• Weight:1200g 
• Recommended Enclosure (sealed): Min:12l / Optimal:18l