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18SOUND 15ND840

18SOUND 15ND840

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18SOUND (Eighteen Sound) 15ND840 — 15" / 15 inch · Woofer/Midrange (WM) · Subwoofer / Bass · Neodymium
3" voice coil · 4/8 Ω
Part no.: 42A-CHS-TT-18S-0053

293.00 € 293.0 EUR 293.00 €

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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 15ND840 — 15" · Woofer

600 W AES · 99 dB Sensitivity · Frequency range 38 Hz – 4000 Hz

Technical data

  • Diameter: 15 "
  • Voice coil: 2.95 "
  • Power handling: 600 W AES
  • Sensitivity: 99 dB
  • Impedance: 8 Ω
  • Magnet: Neo
  • Weight: 4.7 kg
  • Mounting depth: 184 mm
  • Frequency range: 38 – 4000 Hz

Datasheet (PDF) · Manufacturer page

Series: ND · Part no.: 42A-CHS-TT-18S-0053

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs43 Hz
Total Q Qts0.37
Electrical Q Qes0.39
Mechanical Q Qms6.6
Equivalent volume Vas163.0 l
Moving mass Mms94.0 g
Cone area Sd881 cm²
Linear excursion Xmax9.5 mm
Force factor BL17.9 Tm
DC resistance Re5 Ω
Voice coil inductance Le0.43 mH

Enclosure suggestion

The EBP of 110 suggests a bass-reflex enclosure. EBP = fs / Qes = 43 / 0.39

Sealed (Qtc 0.707)

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

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
122.5 l
Tuning frequency Fb
47 Hz
Cut-off frequency F3
49 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 ND
Magnet Neo
Impedance (Ω) 8
Power handling (W) 600
Sensitivity (dB) 99
Frequency from (Hz) 38
Frequency to (Hz) 4000
Abmessungen & Korb
Diameter 15
Voice coil (inch) 2.95
Mounting depth (mm) 184
Weight (kg) 4.7
Thiele-Small-Parameter
Re (Ω) 5
Le (mH) 0.43
Fs (Hz) 43
Qms 6.6
Qes 0.39
Qts 0.37
Vas (l) 163
Xmax (mm) 9.5
BL (Tm) 17.9
Mms (kg) 0.094
Sd (m²) 0.0881