18SOUND 12NTLW3500
18SOUND (Eighteen Sound) 12NTLW3500 — 12" / 12 inch · Woofer/Midrange (WM) · Bass · Neodymium · Dual-Gap
2x3.5" voice coil · 4/8/16 Ω
Part no.: 42A-CHS-TT-18S-0059
Documents
18SOUND 12NTLW3500 — 12" · Woofer
900 W AES · 97 dB Sensitivity · Frequency range 50 Hz – 3000 Hz
Technical data
- Diameter: 12 "
- Voice coil: 3.5 "
- Power handling: 900 W AES
- Sensitivity: 97 dB
- Impedance: 8 Ω
- Magnet: Neo
- Weight: 4.7 kg
- Mounting depth: 193 mm
- Frequency range: 50 – 3000 Hz
Datasheet (PDF) · Manufacturer page
Series: NTLW · Part no.: 42A-CHS-TT-18S-0059
Thiele-Small parameters
| Nominal impedance | 8 Ω |
|---|---|
| Resonance frequency fs | 53 Hz |
| Total Q Qts | 0.33 |
| Electrical Q Qes | 0.35 |
| Mechanical Q Qms | 8 |
| Equivalent volume Vas | 45.0 l |
| Moving mass Mms | 80.0 g |
| Cone area Sd | 531 cm² |
| Linear excursion Xmax | 8.3 mm |
| Force factor BL | 19.5 Tm |
| DC resistance Re | 5.1 Ω |
| Voice coil inductance Le | 0.46 mH |
Enclosure suggestion
The EBP of 151 suggests a bass-reflex enclosure. EBP = fs / Qes = 53 / 0.35
Sealed (Qtc 0.707)
- Enclosure volume Vb
- 12.5 l
- System resonance Fc
- 114 Hz
- Cut-off frequency F3
- 114 Hz
Bass reflex (QB3 after Small)recommended
- Enclosure volume Vb
- 23.2 l
- Tuning frequency Fb
- 65 Hz
- Cut-off frequency F3
- 71 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 %.
- B&C Speakers 12FW88fs 53 Hz · Qts 0.33 · Vas 45.7 l · in the database
- 18 Sound 12LW801fs 54 Hz · Qts 0.33 · Vas 41 l · in the database
- 18 Sound 12W750fs 55 Hz · Qts 0.33 · Vas 61 l · in the shop
- 18 Sound 12NW350fs 54 Hz · Qts 0.34 · Vas 46 l · in the shop
- PRV Audio 12MB2000FTfs 55.6 Hz · Qts 0.32 · Vas 66.9 l · in the database
- Ciare PW328fs 48 Hz · Qts 0.32 · Vas 91 l · in the database
Specifications
| Allgemein | |
|---|---|
| Manufacturer | 18SOUND |
| Category | Low Frequency |
| Series | NTLW |
| Magnet | Neo |
| Impedance (Ω) | 8 |
| Power handling (W) | 900 |
| Sensitivity (dB) | 97 |
| Frequency from (Hz) | 50 |
| Frequency to (Hz) | 3000 |
| Abmessungen & Korb | |
|---|---|
| Diameter | 12 |
| Voice coil (inch) | 3.5 |
| Mounting depth (mm) | 193 |
| Weight (kg) | 4.7 |
| Thiele-Small-Parameter | |
|---|---|
| Re (Ω) | 5.1 |
| Le (mH) | 0.46 |
| Fs (Hz) | 53 |
| Qms | 8 |
| Qes | 0.35 |
| Qts | 0.33 |
| Vas (l) | 45 |
| Xmax (mm) | 8.3 |
| BL (Tm) | 19.5 |
| Mms (kg) | 0.08 |
| Sd (m²) | 0.0531 |