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Running a 12 inch Alpine Type R.

Sub Specs:

Diaphragm Material : Kevlar Reinforced Pulp
Magnetic Weight : 89.4oz.
Mounting Depth (top mount) : 178mm (7”)
Mounting Diameter (top mount) : 275mm (10-7/8”)
Recommended Box Types : Sealed/Vented/Bandpass
Recommended Sealed Box Volume : 0.7 – 1.0 cu. ft.
Spider Material : Nomex
Voice Coil Diameter : 50mm
Power Handling

Power Handling Capacity (Peak) : 1000W
Power Handling Capacity (RMS) : 300W
Thiel Small Parameters

Coil Height (Hvc) : 37.74mm
Cone Area (Sd) : 467.59 sq. cm
D.C.Coil Resistance (Re) : 3.6 ohm + 3.6 ohm
Electrical Q (Qes) : 0.45
Equivalent Suspension Stiffness (Vas) : 58 liters(2.04cu.ft.)
Free Air Resonance (Fs) : 28Hz
Frequency Response : 24Hz - 1kHz
Gap Height (Hag) : 10mm
Impedance (Nominal) : 4 ohm + 4 ohm
Inductance (Le) : 3.85mH at 1kHz (1.34mH at 20kHz)
Linear Excursion (X linear) : 13.87mm
Maximum Excursion (X peak) : 27.7mm
Mechanical Excursion (Peak-to-Peak) : 55mm
Mechanical Q (Qms) : 8.31
Sensitivity : 87 dB/W/M
Total Loudspeaker Q (Qts) : 0.43