Gradient GCP 312/8
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 26 Hz |
| Qts | 0.395 |
| Qes | 0.489 |
| Qms | 2.064 |
| Vas | 194 L |
| Sd | 460 cm² |
| Xmax | 4.8 mm |
| Re | 7.16 Ω |
| Bl | 11.7 T·m |
| Mms | 57.3 g |
| Pe | 100 W |
| Sensitivity | 90.9 dB |
Alignment hint
| EBP | 53 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 88 L |
EBP 50-100: works in either a sealed or ported 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 |
|---|---|---|---|---|---|---|---|---|
| HiVi F12 | 25 -1 | 0.37 -0.03 | 173.9 -20.1 | 6 +1.2 | 90.7 -0.2 | close | + | |
| Monacor SPH-300KE vp1 | 26.5 +0.5 | 0.357 -0.04 | 175 -19 | 6.5 +1.7 | 92.3 +1.4 | close | + | |
| Siare 31SPCT vp jmp repar | 23.4 -2.6 | 0.371 -0.02 | 204 +10 | 4 -0.8 | 90.5 -0.4 | close | Xmax 4 mm < 4.8 mm: lower excursion-limited SPL | + |
| Peerless 315SWR | 24 -2 | 0.433 +0.04 | 210 +16 | 8 +3.2 | 91.3 +0.4 | close | + | |
| HiVi F12 v2009 | 26 = | 0.367 -0.03 | 145.6 -48.4 | 6 +1.2 | 91.1 +0.2 | close | + | |
| Peerless SLS315 | 24.4 -1.6 | 0.452 +0.06 | 205.2 +11.2 | 7.8 +3 | 91.4 +0.5 | close | + | |
| Peerless 831857 | 24 -2 | 0.433 +0.04 | 210 +16 | 9 +4.2 | 91.3 +0.4 | close | + | |
| Philips AD12100W8 vp doum2 | 29.3 +3.3 | 0.399 = | 165 -29 | 6 +1.2 | 92.5 +1.6 | close | + | |
| Philips AD12250W8 vp doum1 | 29.5 +3.5 | 0.404 +0.01 | 216 +22 | 6 +1.2 | 93.2 +2.3 | close | + | |
| HiVi W12 | 28 +2 | 0.419 +0.02 | 156 -38 | 6.9 +2.1 | 91.1 +0.2 | close | + |
Compare the closest 3 against the GCP 312/8 →
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.