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FI Audio IB318-SINGLE2

18" · 4 Ω · 600 W · 93.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size18"
Impedance4 Ω
Fs22.3 Hz
Qts0.652
Qes0.81
Qms3.33
Vas381 L
Sd1210 cm²
Xmax12.3 mm
Re3 Ω
Bl11.9 T·m
Mms274.4 g
Pe600 W
Sensitivity93.4 dB

Alignment hint

EBP28 · sealed
Sealed Vb (Qtc ≈ 0.71)≈ 2162.5 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
Aura Sound NS18-992-4A20 -2.30.47 -0.18322 -5914.5 +2.293.2 -0.2usable+
GRS 18PT-823 +0.70.547 -0.1467 +867.8 -4.592.5 -0.9usable8 Ω vs 4 Ω: amp load changes · 350 W vs 600 W: lower power handling · Xmax 7.8 mm < 12.3 mm: lower excursion-limited SPL+
Dayton Audio UMII18-22 ULTIMAX II DVC22 -0.30.53 -0.12248.2 -132.813.8 +1.590.7 -2.7usable8 Ω vs 4 Ω: amp load changes+
Zeuz DC181125ip22.2 -0.10.458 -0.19429.3 +48.38.5 -3.895 +1.6usable250 W vs 600 W: lower power handling · Xmax 8.5 mm < 12.3 mm: lower excursion-limited SPL+
AE Speakers IB18HT-4ohm18.4 -3.90.567 -0.09632.1 +251.116.7 +4.494.5 +1.1usable+
Magnat AGRESSOR 500024 +1.70.431 -0.22324 -5710.6 -1.795.3 +1.9usableXmax 10.6 mm < 12.3 mm: lower excursion-limited SPL+
AE Speakers IB18HT-818.4 -3.90.568 -0.08632.1 +251.116.7 +4.491.5 -1.9usable8 Ω vs 4 Ω: amp load changes+
BMS 18N862 vp24.8 +2.50.383 -0.27345.6 -35.416.2 +3.994.8 +1.4usable8 Ω vs 4 Ω: amp load changes+
Peerless FSL-1830R09-0832.7 +10.40.587 -0.07283.1 -97.99.6 -2.794.6 +1.2usable8 Ω vs 4 Ω: amp load changes · Xmax 9.6 mm < 12.3 mm: lower excursion-limited SPL+
SB Audience BIANCO-18SW50030 +7.70.516 -0.14335 -469.2 -3.195.8 +2.4usable8 Ω vs 4 Ω: amp load changes · Xmax 9.2 mm < 12.3 mm: lower excursion-limited SPL+

Compare the closest 3 against the IB318-SINGLE2 →

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.