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18SOUND 12NTLW2500

18SOUND 12NTLW2500

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18SOUND (Eighteen Sound) 12NTLW2500 — 12" / 12 inch · Woofer/Midrange (WM) · Bass · Neodymium · Dual-Gap
2x2.5" voice coil · 4/8/16 Ω
Part no.: 42A-CHS-TT-18S-0060

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 12NTLW2500 — 12" · Woofer

500 W AES · 97.5 dB Sensitivity · Frequency range 55 Hz – 4500 Hz

Technical data

  • Diameter: 12 "
  • Voice coil: 2.5 "
  • Power handling: 500 W AES
  • Sensitivity: 97.5 dB
  • Impedance: 4 Ω
  • Magnet: Neo
  • Weight: 3.6 kg
  • Mounting depth: 175 mm
  • Frequency range: 55 – 4500 Hz

Datasheet (PDF) · Manufacturer page

Series: NTLW · Part no.: 42A-CHS-TT-18S-0060

Thiele-Small parameters

Nominal impedance4 Ω
Resonance frequency fs52 Hz
Total Q Qts0.31
Electrical Q Qes0.32
Mechanical Q Qms10.2
Equivalent volume Vas52.7 l
Moving mass Mms71.0 g
Cone area Sd531 cm²
Linear excursion Xmax7.6 mm
Force factor BL14.4 Tm
DC resistance Re2.8 Ω
Voice coil inductance Le0.31 mH

Enclosure suggestion

The EBP of 162 suggests a bass-reflex enclosure. EBP = fs / Qes = 52 / 0.32

Sealed (Qtc 0.707)

Enclosure volume Vb
12.5 l
System resonance Fc
119 Hz
Cut-off frequency F3
119 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
22.1 l
Tuning frequency Fb
68 Hz
Cut-off frequency F3
76 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 NTLW
Magnet Neo
Impedance (Ω) 4
Power handling (W) 500
Sensitivity (dB) 97.5
Frequency from (Hz) 55
Frequency to (Hz) 4500
Abmessungen & Korb
Diameter 12
Voice coil (inch) 2.5
Mounting depth (mm) 175
Weight (kg) 3.6
Thiele-Small-Parameter
Re (Ω) 2.8
Le (mH) 0.31
Fs (Hz) 52
Qms 10.2
Qes 0.32
Qts 0.31
Vas (l) 52.7
Xmax (mm) 7.6
BL (Tm) 14.4
Mms (kg) 0.071
Sd (m²) 0.0531