Wavecor MR120BD02

4Ω
8Ω

Mid-range

4.75″ / 120 mm
Nominal diameter
72 Hz
Resonance
0.55
Q factor
85 dB
Sensitivity
± 1.5 mm
Linear excursion
Wavecor MR120BD02 Mid-rangeWavecor MR120BD02 Mid-rangeWavecor MR120BD02 Mid-range
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
84.8
dB
Frequency response
200 - 4000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
72.0
Hz
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
1.5
mm
Air volume displaced at xmax
VD
7.5
cm³

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
6.4
Ω
Inductance (1kHz, estimated)
LE
0.25
mH
VC Diameter
25
mm
Winding height
HVC
7
mm
Former material
Black fiber glass

Magnet

Force factor
Bl
5.2
N/A
Motor constant
Bl/√RE
2.06
N/√W
Air gap height
HAG
4
mm
Diameter
90
mm
Weight
0.44
kg

Diaphragm

Effective diameter
80
mm
Effective area
SD
50
cm²
Moving mass
MMS
5.5
g
Moving mass (without air load)
MMD
5.2
g
Material
Kevlar/Carbon fiber

Suspensions

Stiffness
KMS
1.11
N/mm
Compliance
CMS
900
µm/N
Equivalent volume to the compliance
VAS
3.2
L
Mechanical resistance
RMS
0.3
N·s/m

Dimensions

Nominal diameter
4.75
″
120
mm
Overall diameter
120
mm
Baffle cutout diameter
98
mm
Mounting depth
64
mm
Volume occupied by the driver (estimated)
0.44
L
Net weight
1.1
kg
Frame material
Die cast aluminum
Impedance
SPL
Wavecor MR120BD02 Impedance
Wavecor MR120BD02 SPL
Wavecor MR120BD02 Dimensions
DatasheetDatasheet

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