Eighteen Sound 10NMB420-8

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Eighteen Sound 10NMB420-8 — 10" Neodymium Midbass/Midrange

The Eighteen Sound 10NMB420-8 is a professional 10" neodymium midbass/midrange for line arrays and compact two-way systems. It combines high sensitivity, low weight and robust power handling. The design with 65 mm ISV voice coil, neodymium motor and Single Demodulating Ring (SDR) provides low distortion and stable performance. Weather-protected cone and plates make it suitable for both indoor and outdoor use.

Technical data

  • Size: 10" (260 mm outer diameter, 232 mm recessed diameter, 110 mm depth)
  • Impedance: 8 ohms
  • Sensitivity: 99 dB (1 W / 1 m)
  • Rated power: 350 W AES, max 500 W
  • Frequency range: 65–5000 Hz
  • Voice coil: 65 mm ISV
  • Magnet: Neodymium
  • Weight: ~3.0 kg

Thiele/Small parameters

Fs: 56 Hz
Qty: 0.25
Qes: 0.27
Qms: 5.5
Vase: 40 L
Sd: 350 cm²
Weight: 36 g
BL: 16.5 T m
Xmax: ±5 mm
Efficiency: 3.2 %

Recommended use

  • Line-array mid-bass in the 65-2000 Hz range
  • Compact two-way systems with crossover up to 2 kHz
  • Cabinet: Bass reflex approx. 25 L, tuned to 70 Hz
  • Outdoor use thanks to weather-protected cone

Item no.

  • Manufacturer: Eighteen Sound
  • Model: 10NMB420-8
  • Category: Cone driver / Midbass