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18SOUND 15NTLS3500

18SOUND 15NTLS3500

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18SOUND (Eighteen Sound) 15NTLS3500 — 15" / 15 inch · Hi-Fi/Studio Woofer · Subwoofer / Bass · Neodymium · Dual-Gap
2x3.5" voice coil · 8 Ω
Part no.: 42A-CHS-TT-18S-0058

655.00 € 655.0 EUR 655.00 €

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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 15NTLS3500 — 15" · Woofer

950 W AES · 89 dB Sensitivity · Frequency range 30 Hz – 2000 Hz

Technical data

  • Diameter: 15 "
  • Voice coil: 3.5 "
  • Power handling: 950 W AES
  • Sensitivity: 89 dB
  • Impedance: 8 Ω
  • Magnet: Neo
  • Weight: 8.3 kg
  • Mounting depth: 261 mm
  • Frequency range: 30 – 2000 Hz

Datasheet (PDF) · Manufacturer page

Series: NTLS · Part no.: 42A-CHS-TT-18S-0058

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs28 Hz
Total Q Qts0.42
Electrical Q Qes0.44
Mechanical Q Qms8.2
Equivalent volume Vas141.0 l
Moving mass Mms250.0 g
Cone area Sd881 cm²
Linear excursion Xmax15.3 mm
Force factor BL21.6 Tm
DC resistance Re5.2 Ω
Voice coil inductance Le1.65 mH

Enclosure suggestion

The EBP of 64 is in the intermediate range — either works; sealed plays tighter, bass reflex deeper and louder. EBP = fs / Qes = 28 / 0.44

Sealed (Qtc 0.707)

Enclosure volume Vb
76.9 l
System resonance Fc
47 Hz
Cut-off frequency F3
47 Hz

Bass reflex (QB3 after Small)

Enclosure volume Vb
161.1 l
Tuning frequency Fb
27 Hz
Cut-off frequency F3
26 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) 950
Sensitivity (dB) 89
Frequency from (Hz) 30
Frequency to (Hz) 2000
Abmessungen & Korb
Diameter 15
Voice coil (inch) 3.5
Mounting depth (mm) 261
Weight (kg) 8.3
Thiele-Small-Parameter
Re (Ω) 5.2
Le (mH) 1.65
Fs (Hz) 28
Qms 8.2
Qes 0.44
Qts 0.42
Vas (l) 141
Xmax (mm) 15.3
BL (Tm) 21.6
Mms (kg) 0.25
Sd (m²) 0.0881