Peavey 1203-4 v1993
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 4 Ω |
| Fs | 57.8 Hz |
| Qts | 0.371 |
| Qes | 0.39 |
| Qms | 7.5 |
| Vas | 72 L |
| Sd | 515 cm² |
| Xmax | 1 mm |
| Re | 3 Ω |
| Bl | 10.5 T·m |
| Mms | 39.2 g |
| Pe | 350 W |
| Sensitivity | 101.8 dB |
Alignment hint
| EBP | 148 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 27.3 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 |
|---|---|---|---|---|---|---|---|---|
| Peavey 1203-8 v1993 | 59.4 +1.6 | 0.381 +0.01 | 69 -3 | 1 = | 98.7 -3.1 | close | 8 Ω vs 4 Ω: amp load changes | + |
| Fostex 12w150 | 60 +2.2 | 0.411 +0.04 | 74 +2 | 1.2 +0.2 | 98.9 -2.9 | close | 8 Ω vs 4 Ω: amp load changes · 60 W vs 350 W: lower power handling | + |
| LaVoce FSF122.02 | 57 -0.8 | 0.374 = | 69.5 -2.5 | 3 +2 | 98.4 -3.4 | close | 8 Ω vs 4 Ω: amp load changes · 150 W vs 350 W: lower power handling | + |
| Celestion TF 1218TC | 56 -1.8 | 0.408 +0.04 | 80.2 +8.2 | 1.5 +0.5 | 98.4 -3.4 | usable | 8 Ω vs 4 Ω: amp load changes · 100 W vs 350 W: lower power handling | + |
| Celestion TF 1218TC v2008 | 56 -1.8 | 0.408 +0.04 | 80.2 +8.2 | 1.5 +0.5 | 98.4 -3.4 | usable | 8 Ω vs 4 Ω: amp load changes · 100 W vs 350 W: lower power handling | + |
| Celestion TF1220 | 55.8 -2 | 0.389 +0.02 | 72.79 +0.79 | 2 +1 | 96.4 -5.4 | usable | 8 Ω vs 4 Ω: amp load changes · 150 W vs 350 W: lower power handling | + |
| JBL G125-8 | 65 +7.2 | 0.32 -0.05 | 70.8 -1.2 | 2.5 +1.5 | 101.4 -0.4 | usable | 8 Ω vs 4 Ω: amp load changes · 200 W vs 350 W: lower power handling | + |
| Fane F90 | 70 +12.2 | 0.382 +0.01 | 61 -11 | 1.5 +0.5 | 100.2 -1.6 | usable | 8 Ω vs 4 Ω: amp load changes · 90 W vs 350 W: lower power handling | + |
| RCF L 12/568H | 58 +0.2 | 0.409 +0.04 | 72 = | 4 +3 | 98.1 -3.7 | usable | 8 Ω vs 4 Ω: amp load changes · 200 W vs 350 W: lower power handling | + |
| Faital PRO 12PR300-8 | 54 -3.8 | 0.382 +0.01 | 73.5 +1.5 | 4.9 +3.9 | 98.2 -3.6 | usable | 8 Ω vs 4 Ω: amp load changes | + |
Compare the closest 3 against the 1203-4 v1993 →
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.