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18SOUND 21NLW9601

18SOUND 21NLW9601

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18SOUND (Eighteen Sound) 21NLW9601 — 21" / 21 inch · High-Performance Woofer · Subwoofer / Bass · Neodymium
5.35" voice coil · 4/8 Ω
Part no.: 42A-CHS-TT-18S-0033

825.00 € 825.0 EUR 825.00 €

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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 21NLW9601 — 21" · Woofer

1800 W AES · 98 dB Sensitivity · Frequency range 25 Hz – 2000 Hz

Technical data

  • Diameter: 21 "
  • Voice coil: 5.3 "
  • Power handling: 1800 W AES
  • Sensitivity: 98 dB
  • Impedance: 8 Ω
  • Magnet: Neo
  • Weight: 13.5 kg
  • Mounting depth: 250 mm
  • Frequency range: 25 – 2000 Hz

Datasheet (PDF) · Manufacturer page

Series: NLW · Part no.: 42A-CHS-TT-18S-0033

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs37 Hz
Total Q Qts0.29
Electrical Q Qes0.31
Mechanical Q Qms5.5
Equivalent volume Vas175.0 l
Moving mass Mms408.0 g
Cone area Sd1.662 cm²
Linear excursion Xmax14 mm
Force factor BL43 Tm
DC resistance Re5.9 Ω
Voice coil inductance Le3.1 mH

Enclosure suggestion

The EBP of 119 suggests a bass-reflex enclosure. EBP = fs / Qes = 37 / 0.31

Sealed (Qtc 0.707)

Enclosure volume Vb
35.4 l
System resonance Fc
90 Hz
Cut-off frequency F3
90 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
58.9 l
Tuning frequency Fb
52 Hz
Cut-off frequency F3
60 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
Frequency from (Hz) 25
Frequency to (Hz) 2000
Abmessungen & Korb
Diameter 21
Voice coil (inch) 5.3
Mounting depth (mm) 250
Weight (kg) 13.5
Thiele-Small-Parameter
Re (Ω) 5.9
Le (mH) 3.1
Fs (Hz) 37
Qms 5.5
Qes 0.31
Qts 0.29
Vas (l) 175
Xmax (mm) 14
BL (Tm) 43
Mms (kg) 0.408
Sd (m²) 0.1662