Precision Devices PD 184
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 33.4 Hz |
| Qts | 0.266 |
| Qes | 0.27 |
| Qms | 16.47 |
| Vas | 304 L |
| Sd | 1164 cm² |
| Xmax | 7.2 mm |
| Re | 5.36 Ω |
| Bl | 24.3 T·m |
| Mms | 141.9 g |
| Pe | 600 W |
| Sensitivity | 99.9 dB |
Alignment hint
| EBP | 124 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 50.1 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 |
|---|---|---|---|---|---|---|---|---|
| PD PD 184 | 33.4 = | 0.266 = | 304 = | 7.2 = | 99.9 = | close | + | |
| 18 Sound 18LW1250 | 35 +1.6 | 0.271 +0.01 | 268 -36 | 8.7 +1.5 | 100.2 +0.3 | close | + | |
| RCF LF 18G401 | 33 -0.4 | 0.289 +0.02 | 268 -36 | 8.2 +1 | 99.3 -0.6 | close | + | |
| 18 Sound 18NLW9400 | 33 -0.4 | 0.26 -0.01 | 268 -36 | 9.5 +2.3 | 98 -1.9 | close | + | |
| 18 Sound 18NLW9300 | 30 -3.4 | 0.28 +0.01 | 316 +12 | 8 +0.8 | 98.7 -1.2 | close | + | |
| B&C 18 PZB 100 (prodance) | 33.7 +0.3 | 0.289 +0.02 | 263 -41 | 7.6 +0.4 | 99 -0.9 | close | + | |
| Oberton 18NSW700-8 | 30.5 -2.9 | 0.243 -0.02 | 309 +5 | 7.7 +0.5 | 98.6 -1.3 | close | + | |
| RCF LF 18N401 | 32 -1.4 | 0.259 -0.01 | 257 -47 | 8.8 +1.6 | 98.9 -1 | close | + | |
| 18 Sound 18LW1251 | 35 +1.6 | 0.27 = | 268 -36 | 9 +1.8 | 98 -1.9 | close | + | |
| B&C 18 PZB 100 | 30 -3.4 | 0.243 -0.02 | 297 -7 | 7.8 +0.6 | 98.8 -1.1 | close | + |
Compare the closest 3 against the PD 184 →
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.