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Stereo Integrity HST-18 MkIII

18" · 4 Ω · 2000 W · 89.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size18"
Impedance4 Ω
Fs14.8 Hz
Qts0.357
Qes0.38
Qms5.95
Vas284 L
Sd1178.4 cm²
Xmax19 mm
Re3.4 Ω
Bl25.7 T·m
Mms792.6 g
Pe2000 W
Sensitivity89.5 dB

Alignment hint

EBP39 · sealed
Sealed Vb (Qtc ≈ 0.71)≈ 97.2 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
Stereo Integrity HST-18 Dual 2 Ohms16.4 +1.60.388 +0.03267 -1719 =89.7 +0.2close+
Stereo Integrity HST-18 MKII15.6 +0.80.327 -0.03307 +2319 =90.4 +0.9close+
CSS Audio Maelstrom 18 DVC by Exodus Audio17.4 +2.60.376 +0.02313 +2914.7 -4.391.2 +1.7usable1000 W vs 2000 W: lower power handling · Xmax 14.7 mm < 19 mm: lower excursion-limited SPL+
Stereo Integrity HT 1817 +2.20.383 +0.03411.9 +127.925.1 +6.192.5 +3usable+
Dayton Audio RSS460HO-419.6 +4.80.387 +0.03298 +1412.8 -6.292.9 +3.4usable900 W vs 2000 W: lower power handling · Xmax 12.8 mm < 19 mm: lower excursion-limited SPL+
TC Sounds LMS-ULTRA 540020.5 +5.70.325 -0.03240.7 -43.316 -393.1 +3.6usableXmax 16 mm < 19 mm: lower excursion-limited SPL+
Dayton Audio RSS460HO-4 v201518.8 +40.322 -0.03272 -1211.9 -7.193.1 +3.6usable900 W vs 2000 W: lower power handling · Xmax 11.9 mm < 19 mm: lower excursion-limited SPL+
Dayton Audio SS18-2221 +6.20.374 +0.02224 -6012.8 -6.290.6 +1.1usable8 Ω vs 4 Ω: amp load changes · 1300 W vs 2000 W: lower power handling · Xmax 12.8 mm < 19 mm: lower excursion-limited SPL+
BMS 18N86225.1 +10.30.34 -0.02312 +2819 =95 +5.5usable8 Ω vs 4 Ω: amp load changes · 1500 W vs 2000 W: lower power handling+
BMS 18N86024 +9.20.372 +0.02304 +2015 -493.7 +4.2usable8 Ω vs 4 Ω: amp load changes · 1500 W vs 2000 W: lower power handling · Xmax 15 mm < 19 mm: lower excursion-limited SPL+

Compare the closest 3 against the HST-18 MkIII →

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.