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18SOUND 18NLS4000

18SOUND 18NLS4000

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18SOUND (Eighteen Sound) 18NLS4000 — 18" / 18 inch · Hi-Fi/Cinema Woofer · Subwoofer / Bass · Neodymium
4" voice coil · 4 Ω
Part no.: 42A-CHS-TT-18S-0044

674.00 € 674.0 EUR 674.00 €

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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 18NLS4000 — 18" · Woofer

1200 W AES · 88 dB Sensitivity · Frequency range 28 Hz – 500 Hz

Technical data

  • Diameter: 18 "
  • Voice coil: 4 "
  • Power handling: 1200 W AES
  • Sensitivity: 88 dB
  • Impedance: 4 Ω
  • Magnet: Neo
  • Weight: 12 kg
  • Mounting depth: 250 mm
  • Frequency range: 28 – 500 Hz

Datasheet (PDF) · Manufacturer page

Series: NLS · Part no.: 42A-CHS-TT-18S-0044

Thiele-Small parameters

Nominal impedance4 Ω
Resonance frequency fs27 Hz
Total Q Qts0.35
Electrical Q Qes0.36
Mechanical Q Qms13.7
Equivalent volume Vas168.0 l
Moving mass Mms433.0 g
Cone area Sd1.225 cm²
Linear excursion Xmax22.3 mm
Force factor BL24.2 Tm
DC resistance Re2.9 Ω
Voice coil inductance Le2.6 mH

Enclosure suggestion

The EBP of 75 is in the intermediate range — either works; sealed plays tighter, bass reflex deeper and louder. EBP = fs / Qes = 27 / 0.36

Sealed (Qtc 0.707)

Enclosure volume Vb
54.5 l
System resonance Fc
55 Hz
Cut-off frequency F3
55 Hz

Bass reflex (QB3 after Small)

Enclosure volume Vb
105.1 l
Tuning frequency Fb
31 Hz
Cut-off frequency F3
33 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 NLS
Magnet Neo
Impedance (Ω) 4
Power handling (W) 1200
Sensitivity (dB) 88
Frequency from (Hz) 28
Frequency to (Hz) 500
Abmessungen & Korb
Diameter 18
Voice coil (inch) 4
Mounting depth (mm) 250
Weight (kg) 12
Thiele-Small-Parameter
Re (Ω) 2.9
Le (mH) 2.6
Fs (Hz) 27
Qms 13.7
Qes 0.36
Qts 0.35
Vas (l) 168
Xmax (mm) 22.3
BL (Tm) 24.2
Mms (kg) 0.433
Sd (m²) 0.1225