PD PD 188
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 37.4 Hz |
| Qts | 0.279 |
| Qes | 0.289 |
| Qms | 8.406 |
| Vas | 224.4 L |
| Sd | 1134.1 cm² |
| Xmax | 6 mm |
| Re | 5.58 Ω |
| Bl | 25.7 T·m |
| Mms | 145.4 g |
| Pe | 600 W |
| Sensitivity | 99.6 dB |
Alignment hint
| EBP | 129 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 41.4 L |
EBP > 100: favours a ported (bass-reflex) 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 |
|---|---|---|---|---|---|---|---|---|
| Precision Devices PD 188 | 37.4 = | 0.279 = | 224.4 = | 6 = | 99.6 = | close | + | |
| Precision Devices PD188 | 37.409 +0.01 | 0.28 = | 224.419 +0.02 | 9.5 +3.5 | 98.5 -1.1 | close | + | |
| Oberton 18B500 | 34.9 -2.5 | 0.276 = | 243.9 +19.5 | 6.7 +0.7 | 99.6 = | close | + | |
| Monacor SP-18/1000HP | 35 -2.4 | 0.282 = | 219 -5.4 | 7.9 +1.9 | 98.8 -0.8 | close | + | |
| P.Audio C18-600LF | 38 +0.6 | 0.279 = | 201 -23.4 | 5.3 -0.7 | 99.5 -0.1 | close | Xmax 5.3 mm < 6 mm: lower excursion-limited SPL | + |
| Fane 18-800N | 38 +0.6 | 0.306 +0.03 | 217 -7.4 | 7.1 +1.1 | 99.5 -0.1 | close | + | |
| RCF L 18S800 | 39 +1.6 | 0.29 +0.01 | 206 -18.4 | 6.3 +0.3 | 100.2 +0.6 | close | + | |
| RCF L 18S801 | 39 +1.6 | 0.29 +0.01 | 206 -18.4 | 6.3 +0.3 | 100.2 +0.6 | close | + | |
| PD PD 185N002 | 36 -1.4 | 0.297 +0.02 | 226 +1.6 | 7.8 +1.8 | 98.7 -0.9 | close | + | |
| Precision Devices PD 185N002 | 36 -1.4 | 0.297 +0.02 | 226 +1.6 | 7.8 +1.8 | 98.7 -0.9 | close | + |
Compare the closest 3 against the PD 188 →
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.