Precision Devices PD 18BR40
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 30 Hz |
| Qts | 0.32 |
| Qes | 0.33 |
| Qms | 10.21 |
| Vas | 309 L |
| Sd | 1134.1 cm² |
| Xmax | 9.3 mm |
| Re | 5.11 Ω |
| Bl | 21.9 T·m |
| Mms | 163.9 g |
| Pe | 700 W |
| Sensitivity | 98 dB |
Alignment hint
| EBP | 91 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 79.6 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 |
|---|---|---|---|---|---|---|---|---|
| PD PD 18BR40 | 30 = | 0.32 = | 309 = | 9.3 = | 98 = | close | + | |
| BMS 18N840V2 | 28.5 -1.5 | 0.314 -0.01 | 288 -21 | 10 +0.7 | 97.1 -0.9 | close | + | |
| 18 Sound 18LW1400 | 31 +1 | 0.29 -0.03 | 297 -12 | 9 -0.3 | 98 = | close | Xmax 9 mm < 9.3 mm: lower excursion-limited SPL | + |
| Peavey LO MAX 18 v2011 | 33.5 +3.5 | 0.321 = | 294.4 -14.6 | 10.2 +0.9 | 98.9 +0.9 | close | + | |
| 18 Sound 18ND9300 | 30 = | 0.28 -0.04 | 322 +13 | 9.5 +0.2 | 98.8 +0.8 | close | + | |
| RCF LF18X401 | 30 = | 0.3 -0.02 | 274 -35 | 12 +2.7 | 97.5 -0.5 | close | + | |
| RCF LF18Y402 | 30 = | 0.3 -0.02 | 274 -35 | 12 +2.7 | 97.5 -0.5 | close | + | |
| RCF LF 18X401 | 30 = | 0.298 -0.02 | 274 -35 | 11.4 +2.1 | 97.5 -0.5 | close | + | |
| Monacor SP-18/600FH | 30 = | 0.327 +0.01 | 404 +95 | 9.3 = | 99 +1 | close | + | |
| Faital PRO 18FH500 v2016 | 30 = | 0.35 +0.03 | 374.8 +65.8 | 9.2 -0.1 | 98.4 +0.4 | close | 500 W vs 700 W: lower power handling · Xmax 9.2 mm < 9.3 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the PD 18BR40 →
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.