Precision Devices PD 185NR1
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 34 Hz |
| Qts | 0.277 |
| Qes | 0.29 |
| Qms | 6.17 |
| Vas | 102 L |
| Sd | 1164 cm² |
| Xmax | 6.3 mm |
| Re | 5.4 Ω |
| Bl | 40.3 T·m |
| Mms | 408 g |
| Pe | 1400 W |
| Sensitivity | 95.1 dB |
Alignment hint
| EBP | 117 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 18.5 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 185NR1 | 34 = | 0.277 = | 102 = | 6.3 = | 95.1 = | close | + | |
| 18 Sound 18NLW9601 | 38 +4 | 0.28 = | 111 +9 | 14 +7.7 | 96 +0.9 | close | 4 Ω vs 8 Ω: amp load changes | + |
| 18 Sound 18NLW9601 | 39 +5 | 0.28 = | 120 +18 | 14 +7.7 | 96 +0.9 | usable | + | |
| Rockford Fosgate SVC 19 2 Ohms | 27 -7 | 0.31 +0.03 | 103.4 +1.4 | 8.1 +1.8 | 96.1 +1 | usable | 2 Ω vs 8 Ω: amp load changes | + |
| Oberton 18NXB1601 | 34.6 +0.6 | 0.286 +0.01 | 146.2 +44.2 | 8.2 +1.9 | 96.9 +1.8 | usable | + | |
| 18 Sound 18NLW9600 | 34 = | 0.281 = | 149 +47 | 9 +2.7 | 97.3 +2.2 | usable | + | |
| 18 Sound 18NLW9601C | 38 +4 | 0.34 +0.06 | 99 -3 | 14 +7.7 | 95 -0.1 | usable | + | |
| 18 Sound 18LW2500 | 34 = | 0.335 +0.06 | 135 +33 | 9.1 +2.8 | 96 +0.9 | usable | + | |
| B&C 18SW115 | 34 = | 0.3 +0.02 | 149.1 +47.1 | 14 +7.7 | 96 +0.9 | usable | 4 Ω vs 8 Ω: amp load changes | + |
| 18 Sound 18NLW4500 | 37 +3 | 0.31 +0.03 | 127 +25 | 14.75 +8.45 | 96.5 +1.4 | usable | 4 Ω vs 8 Ω: amp load changes | + |
Compare the closest 3 against the PD 185NR1 →
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.