18 Sound 12MB650
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 48 Hz |
| Qts | 0.23 |
| Qes | 0.24 |
| Qms | 3.2 |
| Vas | 90 L |
| Sd | 531 cm² |
| Xmax | 5.5 mm |
| Re | 6 Ω |
| Bl | 19 T·m |
| Mms | 48 g |
| Pe | 400 W |
| Sensitivity | 98 dB |
Alignment hint
| EBP | 200 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 10.6 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Sound 12ND730 | 45 -3 | 0.23 = | 90 = | 6.5 +1 | 98 = | close | + | |
| Beyma 12CXA400Nd v2018 | 45 -3 | 0.251 +0.02 | 88.5 -1.5 | 5.5 = | 97.7 -0.3 | close | + | |
| RCF L 12G301 | 48 = | 0.219 -0.01 | 97 +7 | 5.6 +0.1 | 100.1 +2.1 | close | + | |
| Faital PRO 12FH510 | 45 -3 | 0.24 +0.01 | 81.3 -8.7 | 7.5 +2 | 98 = | close | + | |
| RCF LF 12G301 | 43 -5 | 0.219 -0.01 | 97 +7 | 5.9 +0.4 | 98.6 +0.6 | close | + | |
| Fane COLOSSUS 12BM | 43 -5 | 0.211 -0.02 | 89 -1 | 5.3 -0.2 | 98.8 +0.8 | close | Xmax 5.3 mm < 5.5 mm: lower excursion-limited SPL | + |
| Faital PRO 12FH500 | 45 -3 | 0.25 +0.02 | 87.3 -2.7 | 7.5 +2 | 97 -1 | close | + | |
| B&C 12PLB76 | 50 +2 | 0.23 = | 75 -15 | 5 -0.5 | 99 +1 | close | Xmax 5 mm < 5.5 mm: lower excursion-limited SPL | + |
| Faital PRO 12FH500 | 45 -3 | 0.22 -0.01 | 80.3 -9.7 | 7.25 +1.75 | 97 -1 | close | 4 Ω vs 8 Ω: amp load changes | + |
| PHL Audio B303-8 4230 | 40 -8 | 0.22 -0.01 | 87.2 -2.8 | 5.8 +0.3 | 97.3 -0.7 | close | + |
Compare the closest 3 against the 12MB650 →
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.