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18SOUND 15NMB420

18SOUND 15NMB420

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18SOUND (Eighteen Sound) 15NMB420 — 15" / 15 inch · Woofer/Midrange (WM) · Subwoofer / Bass · Neodymium
3" voice coil · 4 Ω
Part no.: 42A-CHS-TT-18S-0057

349.00 € 349.0 EUR 349.00 €

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  • Manufacturer
  • Category
  • Series
  • Magnet
  • Impedance (Ω)
  • Power handling (W)
  • Sensitivity (dB)
  • Frequency from (Hz)
  • Frequency to (Hz)
  • Diameter
  • Voice coil (inch)
  • Mounting depth (mm)
  • Weight (kg)
  • Re (Ω)
  • Le (mH)
  • Fs (Hz)
  • Qms
  • Qes
  • Qts
  • Vas (l)
  • Xmax (mm)
  • BL (Tm)
  • Mms (kg)
  • Sd (m²)

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18SOUND 15NMB420 — 15" · Woofer

450 W AES · 99 dB Sensitivity · Frequency range 40 Hz – 5000 Hz

Technical data

  • Diameter: 15 "
  • Voice coil: 3 "
  • Power handling: 450 W AES
  • Sensitivity: 99 dB
  • Impedance: 8 Ω
  • Magnet: Neo
  • Weight: 3.9 kg
  • Mounting depth: 169 mm
  • Frequency range: 40 – 5000 Hz

Datasheet (PDF) · Manufacturer page

Series: NMB · Part no.: 42A-CHS-TT-18S-0057

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs42 Hz
Total Q Qts0.29
Electrical Q Qes0.3
Mechanical Q Qms6
Equivalent volume Vas225.0 l
Moving mass Mms73.0 g
Cone area Sd900 cm²
Linear excursion Xmax6.5 mm
Force factor BL19 Tm
DC resistance Re5.6 Ω
Voice coil inductance Le0.8 mH

Enclosure suggestion

The EBP of 140 suggests a bass-reflex enclosure. EBP = fs / Qes = 42 / 0.3

Sealed (Qtc 0.707)

Enclosure volume Vb
45.5 l
System resonance Fc
102 Hz
Cut-off frequency F3
102 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
75.7 l
Tuning frequency Fb
59 Hz
Cut-off frequency F3
68 Hz

Vb is the required net internal volume, Fb the tuning frequency of the reflex port and F3 the frequency at which the level has dropped by 3 dB. Calculated approximation after Small. A starting point for simulation, not a finished build plan.

Comparable drivers

Same size, same type, Qts within ±30 %.

Specifications

Allgemein
Manufacturer 18SOUND
Category Low Frequency
Series NMB
Magnet Neo
Impedance (Ω) 8
Power handling (W) 450
Sensitivity (dB) 99
Frequency from (Hz) 40
Frequency to (Hz) 5000
Abmessungen & Korb
Diameter 15
Voice coil (inch) 3
Mounting depth (mm) 169
Weight (kg) 3.9
Thiele-Small-Parameter
Re (Ω) 5.6
Le (mH) 0.8
Fs (Hz) 42
Qms 6
Qes 0.3
Qts 0.29
Vas (l) 225
Xmax (mm) 6.5
BL (Tm) 19
Mms (kg) 0.073
Sd (m²) 0.09