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18SOUND 12ND830

18SOUND 12ND830

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18SOUND (Eighteen Sound) 12ND830 — 12" / 12 inch · Midrange with Lower Midrange (ML) · Midrange · Neodymium
3" voice coil · 4/8 Ω
Part no.: 42A-CHS-MT-18S-0012

335.00 € 335.0 EUR 335.00 €

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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 12ND830 — 12" · Midrange Driver

450 W AES · 99 dB Sensitivity · Frequency range 53 Hz – 5000 Hz

Technical data

  • Diameter: 12 "
  • Voice coil: 3 "
  • Power handling: 450 W AES
  • Sensitivity: 99 dB
  • Impedance: 8 Ω
  • Magnet: Neo
  • Weight: 4.3 kg
  • Mounting depth: 140 mm
  • Frequency range: 53 – 5000 Hz

Datasheet (PDF) · Manufacturer page

Series: ND · Part no.: 42A-CHS-MT-18S-0012

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs55 Hz
Total Q Qts0.28
Electrical Q Qes0.3
Mechanical Q Qms5.15
Equivalent volume Vas72.0 l
Moving mass Mms46.0 g
Cone area Sd531 cm²
Linear excursion Xmax6.5 mm
Force factor BL17.6 Tm
DC resistance Re5.7 Ω
Voice coil inductance Le1.5 mH

Enclosure suggestion

The EBP of 183 suggests a bass-reflex enclosure. EBP = fs / Qes = 55 / 0.3

Sealed (Qtc 0.707)

Enclosure volume Vb
13.4 l
System resonance Fc
139 Hz
Cut-off frequency F3
139 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
21.6 l
Tuning frequency Fb
80 Hz
Cut-off frequency F3
93 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 ND
Magnet Neo
Impedance (Ω) 8
Power handling (W) 450
Sensitivity (dB) 99
Frequency from (Hz) 53
Frequency to (Hz) 5000
Abmessungen & Korb
Diameter 12
Voice coil (inch) 3
Mounting depth (mm) 140
Weight (kg) 4.3
Thiele-Small-Parameter
Re (Ω) 5.7
Le (mH) 1.5
Fs (Hz) 55
Qms 5.15
Qes 0.3
Qts 0.28
Vas (l) 72
Xmax (mm) 6.5
BL (Tm) 17.6
Mms (kg) 0.046
Sd (m²) 0.0531