XL-840D采用聚碳酸酯/玻璃纤维制成的定制涡轮式框架，支持双堆叠磁铁和延伸的圆顶背板，具有很好的性能和稳定性。非压制纸锥确保其自然平滑的低音再现，高性价比是众多派贝斯年轻粉丝们的选择！
ew PBX Dust Cap
8" Dual 4-Ohm Subwoofer
200 watt RMS/400 Watts Max
Proprietary Non-pressed Paper DDC Coated Cone
High Roll Santoprene® Surround
2.0" Vented BASV Voice Coil Former
Perimeter Aero-Vent Voice Coil Cooling Vents
Proprietary Non Resonance Polycarbonate/Glass Fiber Basket
Chrome Push Terminals
Optimally Designed for Both Small Sealed or Ported Enclosures
Nominal Impedance: Dual 4-ohm
BL: 12.83
Inputs: Dual Coil
Subwoofer Frequency Range: 43 Hz - 500 Hz
Voice Coil Size: 2 in
Material: Non Pressed Paper
Magnet Size: 116 oz
Sensitivity (1W / 1M): 84 dB
Motor Structure: 116 oz
Cutout Diameter: 7 1/8 in (181.4mm)
Mounting Depth: 4.375 in
Xmax: 6 mm
Spl: 84 dB
No: 0.14%
Qts: 0.455
Qes: 0.514
Qms: 3.97
Mms: 88.9 g
Cms: 152.1 uM/N
Vas: 9.64 Ltr
SD: 211.24 sqCM
Fs: 43.3 Hz
Test Impedance: 1.6-ohm
VC Impedance: 4-ohm
Size: 8 in
Sensitivity: 84 dB
Frequency Response: 43 Hz - 500 Hz
Voice Coil Size: 2 in
Power Handling (RMS/Peak): 200 / 400 watts