← all drivers

Altec 4156-8A

15" · 8 Ω · 250 W · 98 dB · datasheet ↗

Thiele-Small parameters

Nominal size15"
Impedance8 Ω
Fs29 Hz
Qts0.28
Qes0.31
Qms2.91
Vas353.7 L
Sd850 cm²
Xmax4.3 mm
Re5.6 Ω
Bl16.8 T·m
Mms86.2 g
Pe250 W
Sensitivity98 dB

Alignment hint

EBP94 · flexible
Sealed Vb (Qtc ≈ 0.71)≈ 65.8 L

EBP 50-100: works in either a sealed or ported 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
Monacor SP-385PAX30 +10.285 =365 +11.34.5 +0.298 =close175 W vs 250 W: lower power handling+
Davis 40RCA1527 -20.282 =350 -3.75 +0.797.7 -0.3close+
Davis 40RCA15DF27 -20.282 =350 -3.75 +0.797.7 -0.3close+
Davis 40RCADF27 -20.282 =350 -3.75 +0.797.7 -0.3close+
Kenwood TRIO27 -20.27 -0.01350 -3.75 +0.797.4 -0.6close+
Usher Audio 15HM Studio27 -20.28 =385 +31.35.9 +1.698 =close150 W vs 250 W: lower power handling+
Focal AUDIOM 15B31.6 +2.60.282 =330 -23.76 +1.798.8 +0.8close+
Usher Audio 15 HM28.7 -0.30.299 +0.02314.9 -38.85.5 +1.297.6 -0.4close150 W vs 250 W: lower power handling+
Davis 39RPA1531 +20.27 -0.01340 -13.74 -0.399.3 +1.3closeXmax 4 mm < 4.3 mm: lower excursion-limited SPL+
Davis 38RCA1529 =0.24 -0.04373 +19.35 +0.798.2 +0.2close+

Compare the closest 3 against the 4156-8A →

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.