hi was haltet ihr vom Eminence Kappalite 15'' LF 8 Ohm is ja fürn neodym reltiv günstig zu bekommen 
EKL3015LFL
Code
Specifications
Nominal Basket Diameter 15", 381mm
Nominal Impedance* 8 ohms
Power Rating**
Watts 450W
Music Program 900W
Resonance 42Hz
Usable Frequency Range*** 40Hz-1.5kHz
Sensitivity 99.8
Magnet Weight 11 oz.
Gap Height 0.365", 9.27mm
Voice Coil Diameter 3", 76.2mm
Thiele & Small Parameters
Resonant Frequency (fs) 42Hz
DC Resistance (Re) 5.31
Coil Inductance (Le) 0.92mH
Mechanical Q (Qms) 6.82
Electromagnetic Q (Qes) 0.41
Total Q (Qts) 0.39
Compliance Equivalent Volume (Vas) 158.8 liters / 5.6 cu. ft.
Peak Diaphragm Displacement Volume 846cc
Mechanical Compliance of Suspension (Cms) 0.14mm/N
BL Product (BL) 18.6 T-M
Diaphragm Mass inc. Airload (Mms) 101 grams
Efficiency Bandwidth Product (EBP) 102
Maximum Linear Excursion (Xmax) 9.6mm
Surface Area of Cone (Sd) 881.1 cm2
Maximum Mechanical Limit (Xlim) 17.0mm
Mounting Information
Recommended Enclosure Volume
Vented 102-193 liters/3.6-6.8 cu.ft.
Overall Diameter 15.32", 389.1mm
Baffle Hole Diameter 14.03", 356.4mm
Front Sealing Gasket fitted as standard
Rear Sealing Gasket fitted as standard
Mounting Holes Diameter 0.28", 7mm
Mounting Holes B.C.D. 14.56", 369.8mm
Depth 7.25", 184.2mm
Net Weight 8.6 lbs., 3.9 kg
Shipping Weight 10.7 lbs., 4.9 kg
Materials of Construction
Copper voice coil
Polyimide former
Neodymium magnet
Vented core
Die-cast aluminum basket/heatsink
Paper Cone
Cloth cone edge
Solid composition paper dust cap