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18SOUND 15NCX750

18SOUND 15NCX750

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18SOUND (Eighteen Sound) 15NCX750 — 15" / 15 inch Coaxial Driver · Coax / Coaxial Driver · Neodymium
3"/2.4" voice coils · 8 Ω
Part no.: 42A-CHS-KO-18S-0013

635.00 € 635.0 EUR 635.00 €

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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 15NCX750 — 15" · Coaxial Driver

400 W AES · 98 dB Sensitivity · Frequency range 55 Hz – 4500 Hz

Technical data

  • Diameter: 15 "
  • Voice coil: 3 "
  • Power handling: 400 W AES
  • Sensitivity: 98 dB
  • Impedance: 8 Ω
  • Magnet: Neodymium
  • Weight: 4.9 kg
  • Mounting depth: 185 mm
  • Frequency range: 55 – 4500 Hz
  • Cone material: Titanium
  • Coverage angle: 80 °
  • Rec. crossover: 1.2 kHz

Datasheet (PDF) · Manufacturer page

Series: NCX · Part no.: 42A-CHS-KO-18S-0013

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs49 Hz
Total Q Qts0.37
Electrical Q Qes0.4
Mechanical Q Qms6.32
Equivalent volume Vas141.0 l
Moving mass Mms81.0 g
Cone area Sd881 cm²
Linear excursion Xmax5.5 mm
Force factor BL18.4 Tm
DC resistance Re5.4 Ω
Voice coil inductance Le0.66 mH

Enclosure suggestion

The EBP of 122 suggests a bass-reflex enclosure. EBP = fs / Qes = 49 / 0.4

Sealed (Qtc 0.707)

Enclosure volume Vb
53.2 l
System resonance Fc
94 Hz
Cut-off frequency F3
94 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
106.0 l
Tuning frequency Fb
54 Hz
Cut-off frequency F3
56 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 Coaxial
Series NCX
Magnet Neodymium
Impedance (Ω) 8
Power handling (W) 400
Sensitivity (dB) 98
Frequency from (Hz) 55
Frequency to (Hz) 4500
Abmessungen & Korb
Diameter 15
Voice coil (inch) 3
Mounting depth (mm) 185
Weight (kg) 4.9
Thiele-Small-Parameter
Re (Ω) 5.4
Le (mH) 0.66
Fs (Hz) 49
Qms 6.32
Qes 0.4
Qts 0.37
Vas (l) 141
Xmax (mm) 5.5
BL (Tm) 18.4
Mms (kg) 0.081
Sd (m²) 0.0881