Wavecor MR120BD02
4Ω
8Ω
Mid-range
Nominal diameter | 4.75″ / 120 mm |
Resonance | 72 Hz |
Q factor | 0.55 |
Sensitivity | 84.8 dB |
Linear excursion | ± 1.5 mm |
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 84.8dB
- Frequency response 200 - 4000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 72Hz
- Mechanical quality factor QMS 8.30
- Electrical quality factor QES 0.59
- Total quality factor QTS 0.55
Large signal parameters
- Maximum linear excursion xmax 1.5mm
- Air volume displaced at xmax VD 7.5cm³
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 6.4Ω
- Inductance (1kHz, estimated) LE 0.44mH
- VC Diameter 25mm
- Winding height HVC 7mm
- Former material Black fiber glass
Magnet
- Force factor Bl 5.2N/A
- Motor constant Bl/√RE 2.06N/√W
- Air gap height HAG 4mm
- Diameter 90mm
- Weight 0.44kg
Diaphragm
- Effective diameter 80mm
- Effective area SD 50cm²
- Moving mass MMS 5.5g
- Moving mass (without air load) MMD 5.2g
- Material Kevlar/Carbon fiber
Suspensions
- Stiffness KMS 1.11N/mm
- Compliance CMS 900µm/N
- Equivalent volume to the compliance VAS 3.2L
- Mechanical resistance RMS 0.3N·s/m
Dimensions
- Nominal diameter 4.75″
- 120mm
- Overall diameter 120mm
- Baffle cutout diameter 98mm
- Mounting depth 64mm
- Volume occupied by the driver (estimated) 0.44L
- Net weight 1.1kg
- Frame material Die cast aluminum
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