PHL Audio B303-8 4230
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 40 Hz |
| Qts | 0.22 |
| Qes | 0.234 |
| Qms | 3.7 |
| Vas | 87.2 L |
| Sd | 530 cm² |
| Xmax | 5.8 mm |
| Re | 5.6 Ω |
| Bl | 20.7 T·m |
| Mms | 71.5 g |
| Pe | 450 W |
| Sensitivity | 97.3 dB |
Alignment hint
| EBP | 171 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 9.3 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 |
|---|---|---|---|---|---|---|---|---|
| RCF LF12G301 | 43 +3 | 0.22 = | 97 +9.8 | 7 +1.2 | 97 -0.3 | close | + | |
| RCF LF12G801 | 43 +3 | 0.22 = | 97 +9.8 | 7 +1.2 | 97 -0.3 | close | + | |
| RCF LF12P901 | 43 +3 | 0.22 = | 97 +9.8 | 7 +1.2 | 97 -0.3 | close | + | |
| RCF LF12Y308 | 43 +3 | 0.22 = | 97 +9.8 | 7 +1.2 | 97 -0.3 | close | + | |
| RCF LF 12G301 | 43 +3 | 0.219 = | 97 +9.8 | 5.9 +0.1 | 98.6 +1.3 | close | + | |
| Faital PRO 12FH500 | 45 +5 | 0.22 = | 80.3 -6.9 | 7.25 +1.45 | 97 -0.3 | close | 4 Ω vs 8 Ω: amp load changes | + |
| RCF L 12P300 | 40 = | 0.242 +0.02 | 81 -6.2 | 7.8 +2 | 96.7 -0.6 | close | + | |
| 18 Sound 12ND730 | 45 +5 | 0.23 +0.01 | 90 +2.8 | 6.5 +0.7 | 98 +0.7 | close | + | |
| BMS 12N803 | 41 +1 | 0.24 +0.02 | 77 -10.2 | 6 +0.2 | 97 -0.3 | close | + | |
| PHL Audio 4400Nd | 41 +1 | 0.216 = | 70 -17.2 | 5.7 -0.1 | 96.7 -0.6 | close | Xmax 5.7 mm < 5.8 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the B303-8 4230 →
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.