HiVi PA18
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 41 Hz |
| Qts | 0.388 |
| Qes | 0.43 |
| Qms | 3.98 |
| Vas | 233.1 L |
| Sd | 1288 cm² |
| Xmax | 4.9 mm |
| Re | 5.2 Ω |
| Bl | 21.6 T·m |
| Mms | 150.3 g |
| Pe | 400 W |
| Sensitivity | 99.6 dB |
Alignment hint
| EBP | 95 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 100.4 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
| Driver | Fs (Hz) | Qts | Vas (L) | Xmax (mm) | Sens (dB) | Fit | Notes | Compare |
|---|---|---|---|---|---|---|---|---|
| RCF LF 18P400 | 39.5 -1.5 | 0.391 = | 201 -32.1 | 8 +3.1 | 99 -0.6 | close | + | |
| the box Speaker 18-500/8-A | 40.1 -0.9 | 0.425 +0.04 | 208.3 -24.8 | 5.4 +0.5 | 98.4 -1.2 | close | + | |
| Beyma 18GT400 | 40 -1 | 0.383 -0.01 | 185 -48.1 | 5.3 +0.4 | 98.3 -1.3 | close | + | |
| Elder Audio 18LB100-8A | 40 -1 | 0.425 +0.04 | 208 -25.1 | 6.4 +1.5 | 98.3 -1.3 | close | + | |
| RCF L 18/851KN | 39 -2 | 0.357 -0.03 | 200 -33.1 | 5 +0.1 | 98.4 -1.2 | close | + | |
| Beyma 18G50 vp | 39 -2 | 0.365 -0.02 | 204.9 -28.2 | 6.4 +1.5 | 98.1 -1.5 | close | + | |
| Celestion TF1830 | 35.7 -5.3 | 0.393 +0.01 | 202.4 -30.7 | 4.5 -0.4 | 100.2 +0.6 | close | 4 Ω vs 8 Ω: amp load changes · Xmax 4.5 mm < 4.9 mm: lower excursion-limited SPL | + |
| Beyma 118Nd/W | 36 -5 | 0.398 +0.01 | 249 +15.9 | 7 +2.1 | 97.7 -1.9 | close | + | |
| PHL Audio 7050 | 36 -5 | 0.369 -0.02 | 260 +26.9 | 7.5 +2.6 | 99.3 -0.3 | close | + | |
| PHL Audio 7090 | 36 -5 | 0.386 = | 260 +26.9 | 8 +3.1 | 98.2 -1.4 | close | + |
Compare the closest 3 against the PA18 →
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.