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18SOUND 21LW2600

18SOUND 21LW2600

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18SOUND (Eighteen Sound) 21LW2600 — 21" / 21 inch · Woofer · Subwoofer / Bass · Ferrite Magnet
4" voice coil · 4/8 Ω
Part no.: 42A-CHS-TT-18S-0001

514.00 € 514.0 EUR 514.00 €

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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 21LW2600 — 21" · Woofer

1600 W AES · 97 dB Sensitivity · Frequency range 35 Hz – 1400 Hz

Technical data

  • Diameter: 21 "
  • Voice coil: 4 "
  • Power handling: 1600 W AES
  • Sensitivity: 97 dB
  • Impedance: 8 Ω
  • Magnet: Ferrite
  • Weight: 17.1 kg
  • Mounting depth: 245 mm
  • Frequency range: 35 – 1400 Hz

Datasheet (PDF) · Manufacturer page

Series: LW · Part no.: 42A-CHS-TT-18S-0001

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs27 Hz
Total Q Qts0.33
Electrical Q Qes0.34
Mechanical Q Qms23.1
Equivalent volume Vas333.0 l
Moving mass Mms398.0 g
Cone area Sd1.660 cm²
Linear excursion Xmax14.6 mm
Force factor BL32.5 Tm
DC resistance Re5.2 Ω
Voice coil inductance Le2.67 mH

Enclosure suggestion

The EBP of 79 is in the intermediate range — either works; sealed plays tighter, bass reflex deeper and louder. EBP = fs / Qes = 27 / 0.34

Sealed (Qtc 0.707)

Enclosure volume Vb
92.8 l
System resonance Fc
58 Hz
Cut-off frequency F3
58 Hz

Bass reflex (QB3 after Small)

Enclosure volume Vb
171.6 l
Tuning frequency Fb
33 Hz
Cut-off frequency F3
36 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) 1600
Sensitivity (dB) 97
Frequency from (Hz) 35
Frequency to (Hz) 1400
Abmessungen & Korb
Diameter 21
Voice coil (inch) 4
Mounting depth (mm) 245
Weight (kg) 17.1
Thiele-Small-Parameter
Re (Ω) 5.2
Le (mH) 2.67
Fs (Hz) 27
Qms 23.1
Qes 0.34
Qts 0.33
Vas (l) 333
Xmax (mm) 14.6
BL (Tm) 32.5
Mms (kg) 0.398
Sd (m²) 0.166