18SOUND 15MB700
18SOUND (Eighteen Sound) 15MB700 — 15" / 15 inch · Midrange with Lower Midrange (ML) · Midrange · Ferrite
3" voice coil · 8 Ω
Part no.: 42A-CHS-MT-18S-0002
Documents
18SOUND 15MB700 — 15" · Midrange Driver
400 W AES · 103 dB Sensitivity · Frequency range 45 Hz – 4300 Hz
Technical data
- Diameter: 15 "
- Voice coil: 3 "
- Power handling: 400 W AES
- Sensitivity: 103 dB
- Impedance: 8 Ω
- Magnet: Ferrite
- Weight: 8.3 kg
- Mounting depth: 167 mm
- Frequency range: 45 – 4300 Hz
Datasheet (PDF) · Manufacturer page
Series: MB · Part no.: 42A-CHS-MT-18S-0002
Thiele-Small parameters
| Nominal impedance | 8 Ω |
|---|---|
| Resonance frequency fs | 42 Hz |
| Total Q Qts | 0.29 |
| Electrical Q Qes | 0.31 |
| Mechanical Q Qms | 4.6 |
| Equivalent volume Vas | 202.0 l |
| Moving mass Mms | 73.0 g |
| Cone area Sd | 850 cm² |
| Linear excursion Xmax | 5.5 mm |
| Force factor BL | 17.6 Tm |
| DC resistance Re | 5 Ω |
| Voice coil inductance Le | 1.2 mH |
Enclosure suggestion
The EBP of 135 suggests a bass-reflex enclosure. EBP = fs / Qes = 42 / 0.31
Sealed (Qtc 0.707)
- Enclosure volume Vb
- 40.9 l
- System resonance Fc
- 102 Hz
- Cut-off frequency F3
- 102 Hz
Bass reflex (QB3 after Small)recommended
- Enclosure volume Vb
- 68.0 l
- Tuning frequency Fb
- 59 Hz
- Cut-off frequency F3
- 68 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 %.
- 18 Sound 15NMB420fs 42 Hz · Qts 0.29 · Vas 225 l · in the shop
- Celestion TF1530fs 42 Hz · Qts 0.28 · Vas 162.2 l · in the database
- 18 Sound 15MB1000fs 48 Hz · Qts 0.31 · Vas 132.5 l · in the shop
- 18 Sound 15MB650fs 40 Hz · Qts 0.26 · Vas 210 l · in the shop
- 18 Sound 15NMB1000fs 46 Hz · Qts 0.24 · Vas 124 l · in the shop
- RCF MB15X301fs 38 Hz · Qts 0.34 · Vas 195 l · in the database
Specifications
| Allgemein | |
|---|---|
| Manufacturer | 18SOUND |
| Category | Mid Frequency |
| Series | MB |
| Magnet | Ferrite |
| Impedance (Ω) | 8 |
| Power handling (W) | 400 |
| Sensitivity (dB) | 103 |
| Frequency from (Hz) | 45 |
| Frequency to (Hz) | 4300 |
| Abmessungen & Korb | |
|---|---|
| Diameter | 15 |
| Voice coil (inch) | 3 |
| Mounting depth (mm) | 167 |
| Weight (kg) | 8.3 |
| Thiele-Small-Parameter | |
|---|---|
| Re (Ω) | 5 |
| Le (mH) | 1.2 |
| Fs (Hz) | 42 |
| Qms | 4.6 |
| Qes | 0.31 |
| Qts | 0.29 |
| Vas (l) | 202 |
| Xmax (mm) | 5.5 |
| BL (Tm) | 17.6 |
| Mms (kg) | 0.073 |
| Sd (m²) | 0.085 |