18SOUND 12NTLW2500
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
Documents
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 impedance | 4 Ω |
|---|---|
| Resonance frequency fs | 52 Hz |
| Total Q Qts | 0.31 |
| Electrical Q Qes | 0.32 |
| Mechanical Q Qms | 10.2 |
| Equivalent volume Vas | 52.7 l |
| Moving mass Mms | 71.0 g |
| Cone area Sd | 531 cm² |
| Linear excursion Xmax | 7.6 mm |
| Force factor BL | 14.4 Tm |
| DC resistance Re | 2.8 Ω |
| Voice coil inductance Le | 0.31 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 %.
- B&C Speakers 12CL64fs 52 Hz · Qts 0.3 · Vas 64 l · in the database
- B&C Speakers 12FL76fs 50 Hz · Qts 0.3 · Vas 57 l · in the database
- Beyma 12LEX1000Fefs 49 Hz · Qts 0.3 · Vas 38.4 l · in the shop
- PRV Audio 12MB2000FT-NDYfs 55.1 Hz · Qts 0.3 · Vas 71.5 l · in the database
- 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) | 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 |