Eighteen Sound 8NMB420 8Ω
Woofer
Nominal diameter | 8″ / 200 mm |
Resonance | 61 Hz |
Q factor | 0.28 |
Sensitivity | 96 dB |
Linear excursion | ± 5.8 mm |
Program Power | 400 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
- Sensitivity (1W, 1m, infinite baffle) SPL1W 96dB
- Frequency response 60 - 5500Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 61Hz
- Mechanical quality factor QMS 4.00
- Electrical quality factor QES 0.31
- Total quality factor QTS 0.28
Large signal parameters
- Maximum linear excursion xmax 5.8mm
- Air volume displaced at xmax VD 133cm³
- Power handling P 280W
- Program power Pmax 400W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 5.0Ω
- Inductance (1kHz) LE 0.35mH
- VC Diameter 51mm
Magnet
- Force factor Bl 10N/A
- Motor constant Bl/√RE 4.47N/√W
- Material Neodymium
Diaphragm
- Effective diameter 171mm
- Effective area SD 230cm²
- Moving mass MMS 14.9g
- Moving mass (without air load) MMD 12.4g
Suspensions
- Stiffness KMS 2.19N/mm
- Compliance CMS 457µm/N
- Equivalent volume to the compliance VAS 33L
- Mechanical resistance RMS 1.43N·s/m
Dimensions
- Nominal diameter 8″
- 200mm
- Overall diameter 210mm
- Baffle cutout diameter 186mm
- Overall depth 99mm
- Flange thickness 14mm
- Mounting depth 85mm
- Volume occupied by the driver (estimated) 0.72L
- Net weight 1.7kg
Similar woofers to Eighteen Sound 8NMB420 8Ω
FaitalPRO 10HX240 8Ω8 Ω |
---|
10″ Coaxial |
fS | 65 Hz |
SD | 347 cm² |
65 - 20000 Hz |
QTS | 0.28 |
xmax | 7.4 mm |
SPL1W | 96.7 dB |
Bl/√RE | 6.73 |
Pmax | 500 W |
Eighteen Sound 8NMB4204 Ω |
---|
8″ Woofer |
fS | 59 Hz |
SD | 227 cm² |
60 - 5500 Hz |
QTS | 0.31 |
xmax | 5.8 mm |
SPL1W | 94.1 dB |
Bl/√RE | 4.34 |
Pmax | 400 W |