PHL Audio 6121M
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 37 Hz |
| Qts | 0.272 |
| Qes | 0.29 |
| Qms | 4.5 |
| Vas | 108 L |
| Sd | 810 cm² |
| Xmax | 6.6 mm |
| Re | 5.5 Ω |
| Bl | 26.4 T·m |
| Mms | 157.6 g |
| Pe | 800 W |
| Sensitivity | 96.4 dB |
Alignment hint
| EBP | 128 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 18.8 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 |
|---|---|---|---|---|---|---|---|---|
| B&C 15NBX100 | 37 = | 0.27 = | 109.6 +1.6 | 10 +3.4 | 95 -1.4 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Oberton 15XB1000 | 37.2 +0.2 | 0.283 +0.01 | 111.02 +3.02 | 9 +2.4 | 97 +0.6 | close | + | |
| Oberton 15NXB1000 | 38.34 +1.34 | 0.283 +0.01 | 105.5 -2.5 | 9 +2.4 | 97 +0.6 | close | + | |
| B&C 15 TBX 100 | 35 -2 | 0.284 +0.01 | 113 +5 | 7.6 +1 | 96 -0.4 | close | + | |
| B&C 15TBX100 | 35 -2 | 0.28 +0.01 | 113 +5 | 9 +2.4 | 96 -0.4 | close | + | |
| Oberton 15XB700 | 37.2 +0.2 | 0.283 +0.01 | 111.02 +3.02 | 9 +2.4 | 94.8 -1.6 | close | + | |
| B&C 15PZB100 | 39 +2 | 0.29 +0.02 | 110 +2 | 8 +1.4 | 97 +0.6 | close | + | |
| LaVoce WAF154.00 | 38 +1 | 0.294 +0.02 | 103 -5 | 9 +2.4 | 96 -0.4 | close | + | |
| B&C 15 PZB 100 | 39 +2 | 0.287 +0.01 | 110 +2 | 6 -0.6 | 97.2 +0.8 | close | Xmax 6 mm < 6.6 mm: lower excursion-limited SPL | + |
| B&C 15 PZB 40 | 39 +2 | 0.288 +0.02 | 112 +4 | 6.1 -0.5 | 97.2 +0.8 | close | Xmax 6.1 mm < 6.6 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 6121M →
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.