Precision Devices PD121
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 16 Ω |
| Fs | 59 Hz |
| Qts | 0.201 |
| Qes | 0.209 |
| Qms | 4.96 |
| Vas | 54 L |
| Sd | 530 cm² |
| Xmax | 5 mm |
| Re | 5.7 Ω |
| Bl | 23.36 T·m |
| Mms | 54 g |
| Pe | 300 W |
| Sensitivity | 100 dB |
Alignment hint
| EBP | 282 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 4.7 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 |
|---|---|---|---|---|---|---|---|---|
| RCF MB 12N405 | 52 -7 | 0.203 = | 53 -1 | 5.7 +0.7 | 99.5 -0.5 | close | 8 Ω vs 16 Ω: amp load changes | + |
| RCF MB 12N351 | 55 -4 | 0.201 = | 61 +7 | 4.7 -0.3 | 100.4 +0.4 | close | 8 Ω vs 16 Ω: amp load changes · Xmax 4.7 mm < 5 mm: lower excursion-limited SPL | + |
| RCF CX12N351 | 58 -1 | 0.2 = | 47 -7 | 6 +1 | 98.2 -1.8 | close | 8 Ω vs 16 Ω: amp load changes · 90 W vs 300 W: lower power handling | + |
| RCF CX 12N351 V2017 | 58 -1 | 0.202 = | 47 -7 | 3.6 -1.4 | 99.8 -0.2 | close | 8 Ω vs 16 Ω: amp load changes · Xmax 3.6 mm < 5 mm: lower excursion-limited SPL | + |
| B&C 12MH32 | 53 -6 | 0.19 -0.01 | 63 +9 | 5 = | 101 +1 | close | 8 Ω vs 16 Ω: amp load changes | + |
| Beyma 12P80FE V2 | 50 -9 | 0.201 = | 66.8 +12.8 | 5.2 +0.2 | 99.9 -0.1 | close | 8 Ω vs 16 Ω: amp load changes | + |
| Beyma 12MI100 | 58 -1 | 0.221 +0.02 | 64 +10 | 4.2 -0.8 | 100.4 +0.4 | close | 8 Ω vs 16 Ω: amp load changes · Xmax 4.2 mm < 5 mm: lower excursion-limited SPL | + |
| RCF LF 12N401 | 48 -11 | 0.205 = | 50 -4 | 5.2 +0.2 | 97.8 -2.2 | close | 8 Ω vs 16 Ω: amp load changes | + |
| 18 Sound 12ND940 | 49 -10 | 0.2 = | 64.8 +10.8 | 7.6 +2.6 | 100 = | close | 8 Ω vs 16 Ω: amp load changes | + |
| PD PD 121 | 59 = | 0.201 = | 54 = | 2.7 -2.3 | 100.7 +0.7 | close | 8 Ω vs 16 Ω: amp load changes · Xmax 2.7 mm < 5 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the PD121 →
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.