| Nominal diameter | 8″ / 212 mm |
| Resonance | 41.9 Hz |
| Q factor | 0.44 |
| Sensitivity | 87 dB |
| Linear excursion | ± 7.5 mm |
| Program Power | 280 W |
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 87dB
- Frequency response 40 - 200Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 41.9Hz
- Mechanical quality factor QMS 6.30
- Electrical quality factor QES 0.47
- Total quality factor QTS 0.44
Large signal parameters
- Maximum linear excursion (one way) xmax 7.5mm
- Air volume displaced at xmax VD 155cm³
- Power handling P 180W
- Program power Pmax 280W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 3.2Ω
- Inductance (1kHz, estimated) LE 0.86mH
- VC Diameter 38.6mm
- Former material Aluminium
Magnet
- Force factor Bl 8.8N/A
- Motor constant Bl/√RE 4.92N/√W
- Diameter 120mm
Diaphragm
- Effective diameter 162mm
- Effective area SD 206cm²
- Moving mass MMS 42.1g
- Moving mass (without air load) MMD 39.9g
- Material Paper-Sandwich
Suspensions
- Stiffness KMS 2.99N/mm
- Compliance CMS 334µm/N
- Equivalent volume to the compliance VAS 20.7L
- Mechanical resistance RMS 1.76N·s/m
- Surround material Elastomere
- Spider material PPTA Connex
Dimensions
- Nominal diameter 8″
- 212mm
- Overall diameter 212mm
- Baffle cutout diameter 177mm
- Overall depth 106mm
- Flange thickness 14mm
- Mounting depth 92mm
- Volume occupied by the driver (estimated) 1L
- Net weight 2.6kg
- Frame material Sheet Metal
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