Precision Devices 1550/2
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 46.2 Hz |
| Qts | 0.294 |
| Qes | 0.3 |
| Qms | 13.87 |
| Vas | 126 L |
| Sd | 908 cm² |
| Xmax | 5.3 mm |
| Re | 6.6 Ω |
| Bl | 26.4 T·m |
| Mms | 108.9 g |
| Pe | 600 W |
| Sensitivity | 99 dB |
Alignment hint
| EBP | 154 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 26.3 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 1550/2 | 46.2 = | 0.294 = | 126 = | 5.3 = | 99 = | close | + | |
| PD PD 1550 v2015 | 46.2 = | 0.294 = | 126.4 +0.4 | 5.3 = | 99 = | close | + | |
| Precision Devices PD 1550 v2015 | 46.2 = | 0.294 = | 126.4 +0.4 | 5.3 = | 99 = | close | + | |
| RCF MB 15H401 | 44 -2.2 | 0.3 +0.01 | 121 -5 | 5.7 +0.4 | 98.8 -0.2 | close | + | |
| PHL Audio 5320 | 45 -1.2 | 0.287 -0.01 | 128 +2 | 4.8 -0.5 | 99.3 +0.3 | close | Xmax 4.8 mm < 5.3 mm: lower excursion-limited SPL | + |
| PHL Audio 5231 | 44 -2.2 | 0.277 -0.02 | 127 +1 | 5 -0.3 | 99.1 +0.1 | close | Xmax 5 mm < 5.3 mm: lower excursion-limited SPL | + |
| PD PD 915 | 42.9 -3.3 | 0.279 -0.01 | 129.5 +3.5 | 5.5 +0.2 | 98.9 -0.1 | close | + | |
| Precision Devices PD 915 | 42.9 -3.3 | 0.279 -0.01 | 129.5 +3.5 | 5.5 +0.2 | 98.9 -0.1 | close | + | |
| B&C 14 CXN 6 | 45 -1.2 | 0.28 -0.01 | 131 +5 | 5.6 +0.3 | 100 +1 | close | 400 W vs 600 W: lower power handling | + |
| Fane COLOSSUS 15-750BMN | 45 -1.2 | 0.27 -0.02 | 127 +1 | 5.8 +0.5 | 99.6 +0.6 | close | + |
Compare the closest 3 against the 1550/2 →
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.