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Eminence ALPHA 4-4

4" · 4 Ω · 55 W · 88 dB · datasheet ↗

Thiele-Small parameters

Nominal size4"
Impedance4 Ω
Fs120 Hz
Qts0.63
Qes0.7
Qms6.41
Vas1.76 L
Sd57.7 cm²
Xmax2.6 mm
Re3.42 Ω
Bl4.12 T·m
Mms5 g
Pe55 W
Sensitivity88 dB

Alignment hint

EBP171 · ported
Sealed Vb (Qtc ≈ 0.71)≈ 6.8 L

EBP > 100: favours a ported (bass-reflex) alignment.

Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.

Substitute candidates

DriverFs (Hz)QtsVas (L)Xmax (mm)Sens (dB)FitNotesCompare
Eminence ALPHA 4-8123 +30.75 +0.121.94 +0.182.6 =88 =close8 Ω vs 4 Ω: amp load changes+
Sica 4 L 1 SL108.3 -11.70.63 =1.2 -0.562.4 -0.286.2 -1.8usable8 Ω vs 4 Ω: amp load changes · Xmax 2.4 mm < 2.6 mm: lower excursion-limited SPL+
Faital PRO 4FE32100 -200.61 -0.022.3 +0.542.73 +0.1391 +3usable8 Ω vs 4 Ω: amp load changes · 30 W vs 55 W: lower power handling+
Faital PRO 4FE42110 -100.47 -0.161.9 +0.142.83 +0.2394 +6usable8 Ω vs 4 Ω: amp load changes · 40 W vs 55 W: lower power handling+
Faital PRO 4FE35100 -200.83 +0.22.4 +0.642.73 +0.1391 +3usable8 Ω vs 4 Ω: amp load changes · 30 W vs 55 W: lower power handling+
Faital PRO 4FE42110 -100.38 -0.251.8 +0.042.83 +0.2393 +5usable40 W vs 55 W: lower power handling+
Faital PRO 4FE35100 -200.73 +0.12.4 +0.641.73 -0.8791 +3usable30 W vs 55 W: lower power handling · Xmax 1.73 mm < 2.6 mm: lower excursion-limited SPL+
Sica 4 E 1 CS118 -20.39 -0.241.3 -0.462.2 -0.490.2 +2.2usable8 Ω vs 4 Ω: amp load changes · Xmax 2.2 mm < 2.6 mm: lower excursion-limited SPL+
Faital PRO 4FE32100 -200.53 -0.12.5 +0.741.73 -0.8791 +3usable30 W vs 55 W: lower power handling · Xmax 1.73 mm < 2.6 mm: lower excursion-limited SPL+
Faital PRO 4FE32100 -200.81 +0.182.4 +0.641.83 -0.7791 +3usable16 Ω vs 4 Ω: amp load changes · 30 W vs 55 W: lower power handling · Xmax 1.83 mm < 2.6 mm: lower excursion-limited SPL+

Compare the closest 3 against the ALPHA 4-4 →

Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.

Used in enclosures (0)

No enclosure in the catalog uses this driver yet.