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18SOUND 12NCX750

18SOUND 12NCX750

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18SOUND (Eighteen Sound) 12NCX750 — 12" / 12 inch Coaxial Driver · Coax / Coaxial Driver · Neodymium
3"/2.4" voice coils · 8 Ω
Part no.: 42A-CHS-KO-18S-0008

610.01 € 610.01 EUR 610.01 €

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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 12NCX750 — 12" · Coaxial Driver

400 W AES · 97 dB Sensitivity · Frequency range 60 Hz – 5000 Hz

Technical data

  • Diameter: 12 "
  • Voice coil: 3 "
  • Power handling: 400 W AES
  • Sensitivity: 97 dB
  • Impedance: 8 Ω
  • Magnet: Neodymium
  • Weight: 4.5 kg
  • Mounting depth: 148 mm
  • Frequency range: 60 – 5000 Hz
  • Cone material: Titanium
  • Coverage angle: 80 °
  • Rec. crossover: 1.2 kHz

Datasheet (PDF) · Manufacturer page

Series: NCX · Part no.: 42A-CHS-KO-18S-0008

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs58 Hz
Total Q Qts0.29
Electrical Q Qes0.31
Mechanical Q Qms6.42
Equivalent volume Vas63.0 l
Moving mass Mms48.0 g
Cone area Sd531 cm²
Linear excursion Xmax5.5 mm
Force factor BL17.5 Tm
DC resistance Re5.4 Ω
Voice coil inductance Le0.62 mH

Enclosure suggestion

The EBP of 187 suggests a bass-reflex enclosure. EBP = fs / Qes = 58 / 0.31

Sealed (Qtc 0.707)

Enclosure volume Vb
12.7 l
System resonance Fc
141 Hz
Cut-off frequency F3
141 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
21.2 l
Tuning frequency Fb
81 Hz
Cut-off frequency F3
94 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) 97
Frequency from (Hz) 60
Frequency to (Hz) 5000
Abmessungen & Korb
Diameter 12
Voice coil (inch) 3
Mounting depth (mm) 148
Weight (kg) 4.5
Thiele-Small-Parameter
Re (Ω) 5.4
Le (mH) 0.62
Fs (Hz) 58
Qms 6.42
Qes 0.31
Qts 0.29
Vas (l) 63
Xmax (mm) 5.5
BL (Tm) 17.5
Mms (kg) 0.048
Sd (m²) 0.0531