8 Sub

8-Inch Subwoofer

The primary design goal for the Raven Sub line was to allow the deepest reach and the lowest distortion for best bass in the smallest possible sealed enclosure. Additionally, the overall depth of the driver was configured in order to fit under seat enclosures.

Download Specsheet (PDF)

KEY FEATURES

Rigid Inverted Dome

The extremely rigid inverted cone/dome is made of carbon fiber and fiberglass with high mass to achieve a low resonance frequency in a small enclosure. To assure the integrity of the cone/dome under high pressure of deep Xmax in a very small enclosure, the absolute best solution was carbon fibers flattened to extreme thinness and interwoven, creating the Raven signature line checkerboard pattern.

Surround and Spider

The three roll rubber surround and spider are FEA optimized for maximum excursion and minimum distortion in this specific application.

Original Motor Structure

The proprietary FEA optimized original motor structure is designed to be continuously linear. Magnetic flux in the gap is constant and symmetric.  The inductance is minimized and symmetric over its range. The magnet is also designed for optimized voice coil cooling to withstand high power and high excursion.

Mounting Depth

The Raven 8 Sub mounting depth is only 124.5 mm (4.902 in) with no rear vents so that the enclosure can be as shallow and compact as possible, even allowing contact inside the enclosure between the rear of the magnet and the back wall.

Versatility and Durability

All metal surfaces have a special multi coats treatment for salt water protection. While we do not claim “marine grade”, all Raven Design Studio speakers and drivers are designed, engineered and finished to withstand any environment. They can safely be used in cars, bikes, boats, ATVs, planes, homes. All seasons. All terrains. We consider this a minimum requirement.

Optional Grille

Compatible grilles available separately for purchase.

SPECIFICATIONS

TECHNICAL DATA
  • Recommended Xover point : Low Pass: 75 Hz – 1000 Hz
  • Recommended Xover slope : 12 dB/oct or higher
  • Alternative Xover slope : 18 dB/oct , 24 dB/oct
  • Nominal power handling : 600 W
  • Peak Power: 1200 W
  • Sensitivity 2.83 V / m : 84.6 dB
  • Efficiency 1 W / 1 m / 2 Ohm : 78 dB
  • Nominal impedance: 2 Ohm
  • DC resistance : 1.7 Ohm
  • Voice coil diameter : 76 mm ( 3 inch)
  • Former material: Aluminum
  • Voice coil wire : Copper
  • Voice coil winding : 4 layers single voice coil
  • Inductance at 1 KHz:  0.25 mH
  • Surround : 3 rolls SBR rubber, FEA optimized for very small enclosures.
  • Cone material : Proprietary layered carbon / black fiberglass, profile and composition FEA optimized
  • Magnet : High power Neodymium optimized by FEA modeling
  • Net total weight : 4.3 kg (9.3 Lb)

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THIELE-SMALL PARAMETERS
  • Impedance = 2 Ohm single voice coil
  • Re= 1.7 Ohm
  • FS= 28 Hz
  • Qts= 0.44
  • Qms= 3.54
  • Qes= 0.5
  • Vas = 9 L (0.32 CuFt)
  • Sd = 210 cm2
  • Le = 0.25 mH at 1 kHz
  • BL = 10.76 N/A
  • Mms = 200 grams
  • Cms = 0.16 mm/N
  • Xmax = +/- 20 mm
  • Speaker volume displacement: 0.7 L (0.025 CuFt)

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ENCLOSURE SPECIFICATIONS

Sealed Box:

  • Minimum: 12 L (0.8 CuFt), -3 dB at  566 Hz
  • Best: 6 L (0.21 CuFt), -3 dB at  44 Hz
  • Power to reach +/- 20 mm Xmax : 600 watts

Vented Box:

  • Optimum: 14 L ( 0.5 CuFt)  -3dB at 28 Hz
  • Port tuning: 30 Hz
  • Diameter: 63.5mm (2.5 in) diameter
  • Length: 660mm (26 in)
  • Recommended: High Pass filter: 25 Hz @ 12 dB/oct
  • Power to reach +/- 20 mm Xmax : 1200 watts into 2 ohms