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18SOUND 12NTLS3500

18SOUND 12NTLS3500

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18SOUND (Eighteen Sound) 12NTLS3500 — 12" / 12 inch · Hi-Fi/Studio Woofer · Bass · Neodymium · Dual-Gap
2x3.5" voice coil · 4/8 Ω
Part no.: 42A-CHS-TT-18S-0067

393.00 € 393.0 EUR 393.00 €

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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 12NTLS3500 — 12" · Woofer

750 W AES · 93.5 dB Sensitivity · Frequency range 40 Hz – 4000 Hz

Technical data

  • Diameter: 12 "
  • Voice coil: 3.46 "
  • Power handling: 750 W AES
  • Sensitivity: 93.5 dB
  • Impedance: 8 Ω
  • Magnet: Neo
  • Weight: 4.7 kg
  • Mounting depth: 195 mm
  • Frequency range: 40 – 4000 Hz

Datasheet (PDF) · Manufacturer page

Series: NTLS · Part no.: 42A-CHS-TT-18S-0067

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs41 Hz
Total Q Qts0.41
Electrical Q Qes0.43
Mechanical Q Qms8.5
Equivalent volume Vas65.0 l
Moving mass Mms92.0 g
Cone area Sd531 cm²
Linear excursion Xmax7.9 mm
Force factor BL17.8 Tm
DC resistance Re5.8 Ω
Voice coil inductance Le0.55 mH

Enclosure suggestion

The EBP of 95 is in the intermediate range — either works; sealed plays tighter, bass reflex deeper and louder. EBP = fs / Qes = 41 / 0.43

Sealed (Qtc 0.707)

Enclosure volume Vb
32.9 l
System resonance Fc
71 Hz
Cut-off frequency F3
71 Hz

Bass reflex (QB3 after Small)

Enclosure volume Vb
68.6 l
Tuning frequency Fb
40 Hz
Cut-off frequency F3
40 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 NTLS
Magnet Neo
Impedance (Ω) 8
Power handling (W) 750
Sensitivity (dB) 93.5
Frequency from (Hz) 40
Frequency to (Hz) 4000
Abmessungen & Korb
Diameter 12
Voice coil (inch) 3.46
Mounting depth (mm) 195
Weight (kg) 4.7
Thiele-Small-Parameter
Re (Ω) 5.8
Le (mH) 0.55
Fs (Hz) 41
Qms 8.5
Qes 0.43
Qts 0.41
Vas (l) 65
Xmax (mm) 7.9
BL (Tm) 17.8
Mms (kg) 0.092
Sd (m²) 0.0531