Eminence ALPHA 4-8

Name: ALPHA 4-8
Brand: Eminence

4Ω

8Ω

Mid-range

4″ / 102 mm

Nominal diameter

123 Hz

Resonance

0.75

Q factor

88 dB

Sensitivity

± 2.6 mm

Linear excursion

110 W

Program Power

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Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 88.1; dB
Frequency response: 105 - 12000; Hz
Resonance frequency (free air)
f_S: 123; Hz
Mechanical quality factor
Q_MS: 6.83
Electrical quality factor
Q_ES: 0.84
Total quality factor
Q_TS: 0.75
Maximum linear excursion
x_max: 2.6; mm
Maximum excursion before damage
x_lim: 4.5; mm
Air volume displaced at x_max
V_D: 15; cm³
Power handling
P: 55; W
Program power
P_max: 110; W
Nominal impedance
Z: 8; Ω
DC resistance
R_E: 6.7; Ω
Inductance (1kHz)
L_E: 0.28; mH
VC Diameter: 25; mm
Winding material: Copper
Former material: Polyimide
Force factor
Bl: 4.94; N/A
Motor constant
Bl/√R_E: 1.9; N/√W
Air gap height
H_AG: 3.7; mm
Weight: 0.283; kg
Material: Ferrite
Effective diameter: 86; mm
Effective area
S_D: 58; cm²
Moving mass
M_MS: 4; g
Moving mass (without air load)
M_MD: 3.7; g
Material: Paper
Stiffness
K_MS: 2.38; N/mm
Compliance
C_MS: 420; µm/N
Equivalent volume to the compliance
V_AS: 1.94; L
Mechanical resistance
R_MS: 0.45; N·s/m
Surround material: Cloth
Nominal diameter: 4; ″
: 102; mm
Overall diameter: 116; mm
Baffle cutout diameter: 96; mm
Overall depth: 59; mm
Volume occupied by the driver: 0.33; L
Net weight: 0.68; kg
Frame material: Pressed steel

Datasheet

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Eminence ALPHA 4-8

Mid-range

Available on (affiliate links)

Specifications

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

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