AE Speakers IB18HT-4ohm
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 4 Ω |
| Fs | 18.4 Hz |
| Qts | 0.567 |
| Qes | 0.63 |
| Qms | 5.7 |
| Vas | 632.1 L |
| Sd | 1218 cm² |
| Xmax | 16.7 mm |
| Re | 2.8 Ω |
| Bl | 11.3 T·m |
| Mms | 246.7 g |
| Pe | 500 W |
| Sensitivity | 94.5 dB |
Alignment hint
| EBP | 29 · sealed |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 1138.4 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
| Driver | Fs (Hz) | Qts | Vas (L) | Xmax (mm) | Sens (dB) | Fit | Notes | Compare |
|---|---|---|---|---|---|---|---|---|
| AE Speakers IB18HT-8 | 18.4 = | 0.568 = | 632.1 = | 16.7 = | 91.5 -3 | close | 8 Ω vs 4 Ω: amp load changes | + |
| McCauley 6174 | 20 +1.6 | 0.336 -0.23 | 733.4 +101.3 | 15.2 -1.5 | 95.4 +0.9 | usable | 8 Ω vs 4 Ω: amp load changes · Xmax 15.2 mm < 16.7 mm: lower excursion-limited SPL | + |
| Aura Sound NS18-992-4A | 20 +1.6 | 0.47 -0.1 | 322 -310.1 | 14.5 -2.2 | 93.2 -1.3 | usable | Xmax 14.5 mm < 16.7 mm: lower excursion-limited SPL | + |
| FI Audio IB318-SINGLE2 | 22.3 +3.9 | 0.652 +0.09 | 381 -251.1 | 12.3 -4.4 | 93.4 -1.1 | usable | Xmax 12.3 mm < 16.7 mm: lower excursion-limited SPL | + |
| Stereo Integrity HT 18 | 17 -1.4 | 0.383 -0.18 | 411.9 -220.2 | 25.1 +8.4 | 92.5 -2 | usable | + | |
| GRS 18PT-8 | 23 +4.6 | 0.547 -0.02 | 467 -165.1 | 7.8 -8.9 | 92.5 -2 | usable | 8 Ω vs 4 Ω: amp load changes · 350 W vs 500 W: lower power handling · Xmax 7.8 mm < 16.7 mm: lower excursion-limited SPL | + |
| Altec 3182 | 18 -0.4 | 0.398 -0.17 | 991.1 +359 | 10.7 -6 | 93.5 -1 | risky | 8 Ω vs 4 Ω: amp load changes · 180 W vs 500 W: lower power handling · Xmax 10.7 mm < 16.7 mm: lower excursion-limited SPL | + |
| Fostex FW 505 | 20 +1.6 | 0.404 -0.16 | 860 +227.9 | 8.5 -8.2 | 94.3 -0.2 | risky | 8 Ω vs 4 Ω: amp load changes · 150 W vs 500 W: lower power handling · Xmax 8.5 mm < 16.7 mm: lower excursion-limited SPL | + |
| Zeuz DC181125ip | 22.2 +3.8 | 0.458 -0.11 | 429.3 -202.8 | 8.5 -8.2 | 95 +0.5 | risky | 250 W vs 500 W: lower power handling · Xmax 8.5 mm < 16.7 mm: lower excursion-limited SPL | + |
| BMS 18N862 vp | 24.8 +6.4 | 0.383 -0.18 | 345.6 -286.5 | 16.2 -0.5 | 94.8 +0.3 | risky | 8 Ω vs 4 Ω: amp load changes · Xmax 16.2 mm < 16.7 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the IB18HT-4ohm →
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.