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18SOUND 12MB650

18SOUND 12MB650

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18SOUND (Eighteen Sound) 12MB650 — 12" / 12 inch · Midrange with Lower Midrange (ML) · Midrange · Ferrite
2.5" voice coil · 8 Ω
Part no.: 42A-CHS-MT-18S-0005

278.00 € 278.0 EUR 278.00 €

Price on request

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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 12MB650 — 12" · Midrange Driver

400 W AES · 98 dB Sensitivity · Frequency range 45 Hz – 5000 Hz

Technical data

  • Diameter: 12 "
  • Voice coil: 2.5 "
  • Power handling: 400 W AES
  • Sensitivity: 98 dB
  • Impedance: 8 Ω
  • Magnet: Ferrite
  • Weight: 6.8 kg
  • Mounting depth: 143 mm
  • Frequency range: 45 – 5000 Hz

Datasheet (PDF) · Manufacturer page

Series: MB · Part no.: 42A-CHS-MT-18S-0005

Thiele-Small parameters

Nominal impedance8 Ω
Resonance frequency fs48 Hz
Total Q Qts0.23
Electrical Q Qes0.24
Mechanical Q Qms3.2
Equivalent volume Vas90.0 l
Moving mass Mms48.0 g
Cone area Sd531 cm²
Linear excursion Xmax5.5 mm
Force factor BL19 Tm
DC resistance Re6 Ω
Voice coil inductance Le0.83 mH

Enclosure suggestion

The EBP of 200 suggests a bass-reflex enclosure. EBP = fs / Qes = 48 / 0.24

Sealed (Qtc 0.707)

Enclosure volume Vb
10.7 l
System resonance Fc
148 Hz
Cut-off frequency F3
148 Hz

Bass reflex (QB3 after Small)recommended

Enclosure volume Vb
14.1 l
Tuning frequency Fb
85 Hz
Cut-off frequency F3
109 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 Mid Frequency
Series MB
Magnet Ferrite
Impedance (Ω) 8
Power handling (W) 400
Sensitivity (dB) 98
Frequency from (Hz) 45
Frequency to (Hz) 5000
Abmessungen & Korb
Diameter 12
Voice coil (inch) 2.5
Mounting depth (mm) 143
Weight (kg) 6.8
Thiele-Small-Parameter
Re (Ω) 6
Le (mH) 0.83
Fs (Hz) 48
Qms 3.2
Qes 0.24
Qts 0.23
Vas (l) 90
Xmax (mm) 5.5
BL (Tm) 19
Mms (kg) 0.048
Sd (m²) 0.0531