Conrad CPA12-150
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 49.9 Hz |
| Qts | 0.287 |
| Qes | 0.304 |
| Qms | 5.15 |
| Vas | 66.5 L |
| Sd | 507 cm² |
| Xmax | 3.2 mm |
| Re | 6.2 Ω |
| Bl | 18.8 T·m |
| Mms | 55.1 g |
| Pe | 150 W |
| Sensitivity | 97.4 dB |
Alignment hint
| EBP | 164 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 13.1 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 |
|---|---|---|---|---|---|---|---|---|
| Fane CRESCENDO 12MB | 50 +0.1 | 0.295 +0.01 | 67 +0.5 | 4.3 +1.1 | 97.8 +0.4 | close | + | |
| LaVoce WSN122.50-4 | 49 -0.9 | 0.29 = | 64.43 -2.07 | 5.3 +2.1 | 97 -0.4 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Master Audio HPLSN12-500 | 52 +2.1 | 0.283 = | 65 -1.5 | 5 +1.8 | 97.7 +0.3 | close | + | |
| Elder Audio 12LB075-8N | 52 +2.1 | 0.3 +0.01 | 66.8 +0.3 | 4 +0.8 | 98 +0.6 | close | + | |
| LaVoce NBASS12-30-8 | 46 -3.9 | 0.291 = | 68.8 +2.3 | 4 +0.8 | 97.2 -0.2 | close | + | |
| Ciare 12.00 W1 | 54.94 +5.04 | 0.28 -0.01 | 65.25 -1.25 | 3.75 +0.55 | 97.6 +0.2 | close | + | |
| B&C 12 CL 64 | 52 +2.1 | 0.298 +0.01 | 64 -2.5 | 3.9 +0.7 | 98.1 +0.7 | close | + | |
| McCauley 6234 | 50 +0.1 | 0.297 +0.01 | 60 -6.5 | 4.2 +1 | 97.8 +0.4 | close | + | |
| RCF MB 12X301 | 50 +0.1 | 0.29 = | 70 +3.5 | 5.9 +2.7 | 98.3 +0.9 | close | + | |
| LaVoce WAF123.03 | 50 +0.1 | 0.287 = | 70 +3.5 | 5.5 +2.3 | 99 +1.6 | close | + |
Compare the closest 3 against the CPA12-150 →
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.