Precision Devices PD 185C003
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 33 Hz |
| Qts | 0.224 |
| Qes | 0.229 |
| Qms | 10.6 |
| Vas | 224 L |
| Sd | 1164 cm² |
| Xmax | 8.8 mm |
| Re | 5.4 Ω |
| Bl | 31.1 T·m |
| Mms | 197.2 g |
| Pe | 1500 W |
| Sensitivity | 99.1 dB |
Alignment hint
| EBP | 144 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 25 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 185C003 | 33 = | 0.224 = | 224 = | 8.8 = | 99.1 = | close | + | |
| Precision Devices PD.185C003-8 | 33 = | 0.24 +0.02 | 224 = | 11 +2.2 | 97.3 -1.8 | close | 1000 W vs 1500 W: lower power handling | + |
| RCF LF 18N451 | 31 -2 | 0.24 +0.02 | 245 +21 | 8.8 = | 98.7 -0.4 | close | + | |
| 18 Sound 18NLW9400 | 32 -1 | 0.22 = | 278 +54 | 9.5 +0.7 | 98 -1.1 | close | 4 Ω vs 8 Ω: amp load changes | + |
| RCF LF18N451 | 31 -2 | 0.24 +0.02 | 245 +21 | 9 +0.2 | 97.5 -1.6 | close | + | |
| Precision Devices PD.1850/2 | 33.1 +0.1 | 0.24 +0.02 | 203.84 -20.16 | 11.1 +2.3 | 96.7 -2.4 | close | 800 W vs 1500 W: lower power handling | + |
| RCF LF 18N401 | 32 -1 | 0.259 +0.04 | 257 +33 | 8.8 = | 98.9 -0.2 | close | + | |
| Beyma 18PW1400/FE | 32 -1 | 0.273 +0.05 | 228.9 +4.9 | 9.1 +0.3 | 98.3 -0.8 | close | + | |
| PHL Audio 7321ND | 33 = | 0.278 +0.05 | 230 +6 | 8.5 -0.3 | 98.3 -0.8 | close | Xmax 8.5 mm < 8.8 mm: lower excursion-limited SPL | + |
| Beyma 18PW1400FE /S | 32 -1 | 0.27 +0.05 | 228.9 +4.9 | 10 +1.2 | 98 -1.1 | close | + |
Compare the closest 3 against the PD 185C003 →
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.