Peerless BMR85DD NA8Y

Mid-range

4″ / 102 mm
Nominal diameter
87 Hz
Resonance
0.77
Q factor
85 dB
Sensitivity
± 0.7 mm
Linear excursion
40 W
Program Power
Discontinued
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
84.7
dB
Frequency response
20 - 12000
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
86.8
Hz
Mechanical quality factor
QMS
3.47
Electrical quality factor
QES
0.99
Total quality factor
QTS
0.77

Large signal parameters

Maximum linear excursion
xmax
0.7
mm
Air volume displaced at xmax
VD
4.8
cm³
Power handling
P
20
W
Program power
Pmax
40
W

Voice Coil

Nominal impedance
Z
8
Ω
DC resistance
RE
7.6
Ω
Inductance (1kHz)
LE
0.04
mH
VC Diameter
32
mm
Former material
Aluminium

Magnet

Force factor
Bl
5.9
N/A
Motor constant
Bl/√RE
2.14
N/√W
Air gap height
HAG
4
mm

Diaphragm

Effective diameter
93
mm
Effective area
SD
68
cm²
Moving mass
MMS
8.3
g
Moving mass (without air load)
MMD
7.9
g

Suspensions

Stiffness
KMS
2.47
N/mm
Compliance
CMS
404
µm/N
Equivalent volume to the compliance
VAS
2.62
L
Mechanical resistance
RMS
1.3
N·s/m

Dimensions

Nominal diameter
4
102
mm
Volume occupied by the driver (estimated)
0.14
L
Net weight
0.22
kg
Peerless BMR85DD NA8Y SPL & Impedance
Peerless BMR85DD NA8Y Dimensions

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