Driver Specifications 

• Nominal Diameter:  12 in. / 300 mm 
• Nominal Impedance:  4 ohm 
• Power Handling:  150W 
• Voice Coil Diameter:  2.0 in. / 50 mm 

T/S Parameters 

• Free Air Resonance (Fs):  26.68 Hz 
• Electrical “Q” (Qes):  0.758 
• Mechanical “Q” (Qms):  8.432 
• Total Speaker “Q” (Qts):  0.696 
• Equivalent Compliance (Vas):  3.77 cu. ft. / 106.75 liters  
• One-Way, Linear Excursion (Xmax):  0.282 in. / 7.16 mm  
• Efficiency (1W/1m):  87.4 dB SPL 
• DC Resistance (Re):  1.6 ohm or 6.447 ohm 
• Effective Piston Area (Sd):  81.0 sq. in. / 0.0523 sq. m. 

Driver Physical Specifications

• Mounting Hole Diameter (B): 11.0 in. / 280 mm
• Mounting Depth (E): 5.25 in. / 133 mm
• Driver Displacement: 0.07 cu. ft. / 2.0 liters

Recommended Enclosures

• Sealed Enclosure Range:  1.25 - 1.75 cu. ft. / 35.4 - 50.0 liters
• Ported Enclosure:  2.00 cu. ft. / 56.6 liters
• Tune To: 24 Hz (3 in. dia. x 15 in. long)