Sony XS-L121P5S
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 4 Ω |
| Fs | 22.6 Hz |
| Qts | 0.51 |
| Qes | 0.55 |
| Qms | 5.59 |
| Vas | 102.1 L |
| Sd | 515 cm² |
| Xmax | 11.5 mm |
| Re | 3.3 Ω |
| Bl | 12.5 T·m |
| Mms | 183.3 g |
| Pe | 350 W |
| Sensitivity | 89 dB |
Alignment hint
| EBP | 41 · sealed |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 110.7 L |
EBP < 50: favours a sealed (closed) 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 |
|---|---|---|---|---|---|---|---|---|
| Blaupunkt VCS 1200 | 23 +0.4 | 0.487 -0.02 | 102 -0.1 | 13 +1.5 | 89.9 +0.9 | close | + | |
| CSS Audio TRIO12 vp | 22 -0.6 | 0.429 -0.08 | 97 -5.1 | 10 -1.5 | 88.5 -0.5 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 10 mm < 11.5 mm: lower excursion-limited SPL | + |
| Infinity KAPPA PERFECT 12.1 | 23.32 +0.72 | 0.44 -0.07 | 99.97 -2.13 | 14.15 +2.65 | 86.2 -2.8 | close | + | |
| Dayton Audio RSS315HF-4 | 25 +2.4 | 0.489 -0.02 | 85.1 -17 | 10.1 -1.4 | 89.4 +0.4 | close | Xmax 10.1 mm < 11.5 mm: lower excursion-limited SPL | + |
| Dayton Audio RSS315HFA-8 v2016 | 22.2 -0.4 | 0.444 -0.07 | 97.2 -4.9 | 11 -0.5 | 85.8 -3.2 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 11 mm < 11.5 mm: lower excursion-limited SPL | + |
| Ground Zero GZTW 30T | 25 +2.4 | 0.443 -0.07 | 110 +7.9 | 11.9 +0.4 | 90.7 +1.7 | close | + | |
| JL Audio 13W6V2-D4 | 24.3 +1.7 | 0.434 -0.08 | 111.6 +9.5 | 10.6 -0.9 | 88.3 -0.7 | usable | 8 Ω vs 4 Ω: amp load changes · Xmax 10.6 mm < 11.5 mm: lower excursion-limited SPL | + |
| Thiel TSW 12.1 vp | 20 -2.6 | 0.505 -0.01 | 112 +9.9 | 8.6 -2.9 | 89.9 +0.9 | usable | 150 W vs 350 W: lower power handling · Xmax 8.6 mm < 11.5 mm: lower excursion-limited SPL | + |
| Rockford Fosgate P1S412 | 25 +2.4 | 0.537 +0.03 | 109 +6.9 | 9 -2.5 | 90.4 +1.4 | usable | 250 W vs 350 W: lower power handling · Xmax 9 mm < 11.5 mm: lower excursion-limited SPL | + |
| Focal AUDITOR RSB-300 | 25 +2.4 | 0.466 -0.04 | 93 -9.1 | 10.2 -1.3 | 87.4 -1.6 | usable | 8 Ω vs 4 Ω: amp load changes · Xmax 10.2 mm < 11.5 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the XS-L121P5S →
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.