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18SOUND 21NLW5300

18SOUND 21NLW5300

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18SOUND (Eighteen Sound) 21NLW5300 — 21" / 21 inch · High-Performance Woofer · Subwoofer / Bass · Neodymium
5.35" voice coil · 4/8 Ω
Part no.: 42A-CHS-TT-18S-0034

873.00 € 873.0 EUR 873.00 €

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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 21NLW5300 — 21" · Woofer

1800 W AES · 98.5 dB Sensitivity · Frequency range 30 Hz – 500 Hz

Technical data

  • Diameter: 21 "
  • Voice coil: 5.3 "
  • Power handling: 1800 W AES
  • Sensitivity: 98.5 dB
  • Impedance: 8 Ω
  • Magnet: Neo
  • Weight: 14 kg
  • Mounting depth: 251 mm
  • Frequency range: 30 – 500 Hz

Datasheet (PDF) · Manufacturer page

Series: NLW · Part no.: 42A-CHS-TT-18S-0034

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs31 Hz
Total Q Qts0.32
Electrical Q Qes0.34
Mechanical Q Qms4.7
Equivalent volume Vas325.0 l
Moving mass Mms327.0 g
Cone area Sd1.662 cm²
Linear excursion Xmax15.3 mm
Force factor BL31 Tm
DC resistance Re5.2 Ω
Voice coil inductance Le2.6 mH

Enclosure suggestion

The EBP of 91 is in the intermediate range — either works; sealed plays tighter, bass reflex deeper and louder. EBP = fs / Qes = 31 / 0.34

Sealed (Qtc 0.707)

Enclosure volume Vb
83.7 l
System resonance Fc
68 Hz
Cut-off frequency F3
68 Hz

Bass reflex (QB3 after Small)

Enclosure volume Vb
151.3 l
Tuning frequency Fb
39 Hz
Cut-off frequency F3
43 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 NLW
Magnet Neo
Impedance (Ω) 8
Power handling (W) 1800
Sensitivity (dB) 98.5
Frequency from (Hz) 30
Frequency to (Hz) 500
Abmessungen & Korb
Diameter 21
Voice coil (inch) 5.3
Mounting depth (mm) 251
Weight (kg) 14
Thiele-Small-Parameter
Re (Ω) 5.2
Le (mH) 2.6
Fs (Hz) 31
Qms 4.7
Qes 0.34
Qts 0.32
Vas (l) 325
Xmax (mm) 15.3
BL (Tm) 31
Mms (kg) 0.327
Sd (m²) 0.1662