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Dayton Audio IB385-8

15" · 8 Ω · 350 W · 89.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size15"
Impedance8 Ω
Fs21.5 Hz
Qts0.588
Qes0.63
Qms8.92
Vas248.9 L
Sd819.4 cm²
Xmax12.4 mm
Re5.2 Ω
Bl15.2 T·m
Mms207.2 g
Pe350 W
Sensitivity89.8 dB

Alignment hint

EBP34 · sealed
Sealed Vb (Qtc ≈ 0.71)≈ 557.9 L

EBP < 50: favours a sealed (closed) 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
Rockford Fosgate P2D4-1520.9 -0.60.655 +0.07219.6 -29.311.3 -1.187.3 -2.5usableXmax 11.3 mm < 12.4 mm: lower excursion-limited SPL+
Oxygen AIR2 38022.7 +1.20.543 -0.04202.2 -46.711.5 -0.991.6 +1.8usable4 Ω vs 8 Ω: amp load changes · Xmax 11.5 mm < 12.4 mm: lower excursion-limited SPL+
Hertz Audio DS 38.323 +1.50.65 +0.06244 -4.99 -3.487.9 -1.9usable4 Ω vs 8 Ω: amp load changes · Xmax 9 mm < 12.4 mm: lower excursion-limited SPL+
MTX Audio RT15-0420 -1.50.479 -0.11223 -25.910.3 -2.190.8 +1usable4 Ω vs 8 Ω: amp load changes · Xmax 10.3 mm < 12.4 mm: lower excursion-limited SPL+
GRS 15SSW-4HE20.7 -0.80.487 -0.1196.6 -52.39.5 -2.989.8 =usableXmax 9.5 mm < 12.4 mm: lower excursion-limited SPL+
Dayton Audio UM15-22 ULTIMAX DVC19.5 -20.474 -0.11224.3 -24.69.5 -2.990.2 +0.4usable4 Ω vs 8 Ω: amp load changes · Xmax 9.5 mm < 12.4 mm: lower excursion-limited SPL+
Rockford Fosgate P3D4-1522.4 +0.90.566 -0.02155.8 -93.111 -1.487.3 -2.5usableXmax 11 mm < 12.4 mm: lower excursion-limited SPL+
Dayton Audio DVC385-8820.9 -0.60.446 -0.14237 -11.911.1 -1.393.8 +4usable4 Ω vs 8 Ω: amp load changes · Xmax 11.1 mm < 12.4 mm: lower excursion-limited SPL+
MTX Audio T315422.7 +1.20.561 -0.03315.9 +679.4 -393.8 +4usable4 Ω vs 8 Ω: amp load changes · 200 W vs 350 W: lower power handling · Xmax 9.4 mm < 12.4 mm: lower excursion-limited SPL+
Rockford Fosgate P1S2-1523 +1.50.55 -0.04191.5 -57.49 -3.487.4 -2.4usable2 Ω vs 8 Ω: amp load changes · 250 W vs 350 W: lower power handling · Xmax 9 mm < 12.4 mm: lower excursion-limited SPL+

Compare the closest 3 against the IB385-8 →

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.