Eighteen Sound 8NMB420 16Ω

16Ω

Woofer

Nominal diameter	8″ / 200 mm
Resonance	66 Hz
Q factor	0.41
Sensitivity	93.5 dB
Linear excursion	± 5.8 mm
Program Power	400 W

Eighteen Sound 8NMB420 16Ω Woofer

Specifications

Sensitivity (1W, 1m, infinite baffle) SPL1W 93.5dB
Frequency response 60 - 5500Hz

Thiele & Small parameters

Resonance frequency (free air) fS 66Hz
Mechanical quality factor QMS 3.20
Electrical quality factor QES 0.47
Total quality factor QTS 0.41

Large signal parameters

Maximum linear excursion (one way) xmax 5.8mm
Air volume displaced at xmax VD 132cm³
Power handling P 280W
Program power Pmax 400W

Voice Coil

Nominal impedance Z 16Ω
DC resistance RE 9.8Ω
Inductance (1kHz) LE 0.61mH
VC Diameter 51mm

Magnet

Force factor Bl 12N/A
Motor constant Bl/√RE 3.83N/√W

Diaphragm

Effective diameter 170mm
Effective area SD 227cm²
Moving mass MMS 17g
Moving mass (without air load) MMD 14.5g

Suspensions

Stiffness KMS 2.92N/mm
Compliance CMS 342µm/N
Equivalent volume to the compliance VAS 24.5L
Mechanical resistance RMS 2.2N·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

Eighteen Sound 8NMB420 16Ω SPL

Eighteen Sound 8NMB420 16Ω Dimensions

Export this driver to a simulation software:

Closed Box Simulator·

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Eighteen Sound 8MB400 Woofer

Eighteen Sound 8MB400 8 Ω
8″ Woofer
fS	64 Hz
SD	227 cm²
55 - 5200 Hz
QTS	0.38
xmax	5.8 mm
SPL1W	93.1 dB
Bl/√RE	4.16
Pmax	400 W