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18SOUND 21LW1400

18SOUND 21LW1400

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18SOUND (Eighteen Sound) 21LW1400 — 21" / 21 inch · Woofer · Subwoofer / Bass · Ferrite Magnet
4" voice coil · 8 Ω
Part no.: 42A-CHS-TT-18S-0002

658.00 € 658.0 EUR 658.00 €

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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 21LW1400 — 21" · Woofer

1000 W AES · 99 dB Sensitivity · Frequency range 24 Hz – 2000 Hz

Technical data

  • Diameter: 21 "
  • Voice coil: 4 "
  • Power handling: 1000 W AES
  • Sensitivity: 99 dB
  • Impedance: 8 Ω
  • Magnet: Ferrite
  • Weight: 17 kg
  • Mounting depth: 259 mm
  • Frequency range: 24 – 2000 Hz

Datasheet (PDF) · Manufacturer page

Series: LW · Part no.: 42A-CHS-TT-18S-0002

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs28 Hz
Total Q Qts0.24
Electrical Q Qes0.24
Mechanical Q Qms9.32
Equivalent volume Vas385.0 l
Moving mass Mms296.0 g
Cone area Sd1.660 cm²
Linear excursion Xmax9.5 mm
Force factor BL33.5 Tm
DC resistance Re5 Ω
Voice coil inductance Le2.85 mH

Enclosure suggestion

The EBP of 117 suggests a bass-reflex enclosure. EBP = fs / Qes = 28 / 0.24

Sealed (Qtc 0.707)

Enclosure volume Vb
50.1 l
System resonance Fc
82 Hz
Cut-off frequency F3
82 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
69.4 l
Tuning frequency Fb
48 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 LW
Magnet Ferrite
Impedance (Ω) 8
Power handling (W) 1000
Sensitivity (dB) 99
Frequency from (Hz) 24
Frequency to (Hz) 2000
Abmessungen & Korb
Diameter 21
Voice coil (inch) 4
Mounting depth (mm) 259
Weight (kg) 17
Thiele-Small-Parameter
Re (Ω) 5
Le (mH) 2.85
Fs (Hz) 28
Qms 9.32
Qes 0.24
Qts 0.24
Vas (l) 385
Xmax (mm) 9.5
BL (Tm) 33.5
Mms (kg) 0.296
Sd (m²) 0.166