QUANTUM AUDIO QW30008D4 (pair)

Winning Bid: $111.00

Up for auction is a pair of Quantum Audio 8″ Subwoofers. Want a lot of bass without taking up a bunch of trunk space? This is the auction for you!! Good Luck and Happy Bidding!!

Item condition: New


The engineers at Quantum Audio have designed this subwoofer from the ground up to shake the ground up. The foam surround along with the die-cast aluminum vented basket allow for maximum excursion while the protective magnet cover gives the woofer a rugged yet stylish appearance.


  • 2.5″ / 63.5mm 4 Layer Aluminum 4 Ohm DVC
  • Heavy Gauge Stamped Steel Basket
  • High Temperature Voice Coil
  • QEMT Aluminum Voice Coil Former
  • High-Excursion Foam Surround
  • Compressed Paper Cone
  • Injection Molded PP Dust Cap
  • Proprietary Full Round PVC Gasket
  • Heavy Gauge Spring Terminal


Outside Diameter (A) ?8.43″ (214mm)
Cutout Diameter (B) 7.17″ (182mm)
Mounting Depth (C) 4.88″ (124mm)
Structure 8″ (20cm) Woofer
Dynamic Power Handling 3000 Watts
Nominal Power Handling 1000 Watts
Impedance Dual 4Ω Voice Coil
Resonant Frequency (fs) 40.731Hz
D.C. Voice Coil Resistance (Re) 6.4Ω
Mechanical Quality Factor (Qms) 4.149
Electrical Quality Factor (Qes) 0.585
Total Quality Factor (Qts) 0.513
Mass of Diaphragm/Coil (Mms) 133.306 g
Force Factor (Bl) 19.316
Sound Pressure Level (SPL) 81.1dB

Additional information

Weight 26.5 lbs


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