18SOUND 15ND930
18SOUND (Eighteen Sound) 15ND930 — 15" / 15 inch · Woofer/Midrange (WM) · Subwoofer / Bass · Neodymium
3" voice coil · 4/8/16 Ω
Part no.: 42A-CHS-TT-18S-0052
Documents
18SOUND 15ND930 — 15" · Woofer
500 W AES · 98 dB Sensitivity · Frequency range 40 Hz – 4100 Hz
Technical data
- Diameter: 15 "
- Voice coil: 3 "
- Power handling: 500 W AES
- Sensitivity: 98 dB
- Impedance: 8 Ω
- Magnet: Neo
- Weight: 4.7 kg
- Mounting depth: 177 mm
- Frequency range: 40 – 4100 Hz
Datasheet (PDF) · Manufacturer page
Series: ND · Part no.: 42A-CHS-TT-18S-0052
Thiele-Small parameters
| Nominal impedance | 8 Ω |
|---|---|
| Resonance frequency fs | 36 Hz |
| Total Q Qts | 0.22 |
| Electrical Q Qes | 0.23 |
| Mechanical Q Qms | 5.3 |
| Equivalent volume Vas | 206.0 l |
| Moving mass Mms | 101.0 g |
| Cone area Sd | 850 cm² |
| Linear excursion Xmax | 7.5 mm |
| Force factor BL | 23.8 Tm |
| DC resistance Re | 5.5 Ω |
| Voice coil inductance Le | 1.61 mH |
Enclosure suggestion
The EBP of 157 suggests a bass-reflex enclosure. EBP = fs / Qes = 36 / 0.23
Sealed (Qtc 0.707)
- Enclosure volume Vb
- 22.1 l
- System resonance Fc
- 116 Hz
- Cut-off frequency F3
- 116 Hz
Bass reflex (QB3 after Small)recommended
- Enclosure volume Vb
- 27.9 l
- Tuning frequency Fb
- 67 Hz
- Cut-off frequency F3
- 87 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 15NDL76fs 37 Hz · Qts 0.22 · Vas 195 l · in the database
- B&C Speakers 15SW115fs 34 Hz · Qts 0.22 · Vas 105 l · in the database
- 18 Sound 15W930fs 33 Hz · Qts 0.22 · Vas 240 l · in the shop
- B&C Speakers 15NW100fs 33 Hz · Qts 0.22 · Vas 139 l · in the database
- B&C Speakers 15NW76fs 42 Hz · Qts 0.22 · Vas 130 l · in the database
- B&C Speakers 15NW100fs 34 Hz · Qts 0.23 · Vas 126.1 l · in the database
Specifications
| Allgemein | |
|---|---|
| Manufacturer | 18SOUND |
| Category | Low Frequency |
| Series | ND |
| Magnet | Neo |
| Impedance (Ω) | 8 |
| Power handling (W) | 500 |
| Sensitivity (dB) | 98 |
| Frequency from (Hz) | 40 |
| Frequency to (Hz) | 4100 |
| Abmessungen & Korb | |
|---|---|
| Diameter | 15 |
| Voice coil (inch) | 3 |
| Mounting depth (mm) | 177 |
| Weight (kg) | 4.7 |
| Thiele-Small-Parameter | |
|---|---|
| Re (Ω) | 5.5 |
| Le (mH) | 1.61 |
| Fs (Hz) | 36 |
| Qms | 5.3 |
| Qes | 0.23 |
| Qts | 0.22 |
| Vas (l) | 206 |
| Xmax (mm) | 7.5 |
| BL (Tm) | 23.8 |
| Mms (kg) | 0.101 |
| Sd (m²) | 0.085 |