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18SOUND 12NDA520

18SOUND 12NDA520

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18SOUND (Eighteen Sound) 12NDA520 — 12" / 12 inch · Midrange with Lower Midrange (ML) · Midrange · Neodymium
2.5" voice coil · 8 Ω
Part no.: 42A-CHS-MT-18S-0015

299.00 € 299.0 EUR 299.00 €

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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 12NDA520 — 12" · Midrange Driver

300 W AES · 100.5 dB Sensitivity · Frequency range 55 Hz – 6000 Hz

Technical data

  • Diameter: 12 "
  • Voice coil: 2.5 "
  • Power handling: 300 W AES
  • Sensitivity: 100.5 dB
  • Impedance: 8 Ω
  • Magnet: Neo
  • Weight: 3 kg
  • Mounting depth: 125 mm
  • Frequency range: 55 – 6000 Hz

Datasheet (PDF) · Manufacturer page

Series: NDA · Part no.: 42A-CHS-MT-18S-0015

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs50 Hz
Total Q Qts0.27
Electrical Q Qes0.28
Mechanical Q Qms5.5
Equivalent volume Vas111.0 l
Moving mass Mms36.0 g
Cone area Sd531 cm²
Linear excursion Xmax4 mm
Force factor BL14.4 Tm
DC resistance Re5.2 Ω
Voice coil inductance Le0.03 mH

Enclosure suggestion

The EBP of 179 suggests a bass-reflex enclosure. EBP = fs / Qes = 50 / 0.28

Sealed (Qtc 0.707)

Enclosure volume Vb
19.0 l
System resonance Fc
131 Hz
Cut-off frequency F3
131 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
29.5 l
Tuning frequency Fb
75 Hz
Cut-off frequency F3
90 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 Mid Frequency
Series NDA
Magnet Neo
Impedance (Ω) 8
Power handling (W) 300
Sensitivity (dB) 100.5
Frequency from (Hz) 55
Frequency to (Hz) 6000
Abmessungen & Korb
Diameter 12
Voice coil (inch) 2.5
Mounting depth (mm) 125
Weight (kg) 3
Thiele-Small-Parameter
Re (Ω) 5.2
Le (mH) 0.03
Fs (Hz) 50
Qms 5.5
Qes 0.28
Qts 0.27
Vas (l) 111
Xmax (mm) 4
BL (Tm) 14.4
Mms (kg) 0.036
Sd (m²) 0.0531