JBL G135-8
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 45 Hz |
| Qts | 0.355 |
| Qes | 0.38 |
| Qms | 5.5 |
| Vas | 235 L |
| Sd | 896.1 cm² |
| Xmax | 2.5 mm |
| Re | 5.2 Ω |
| Bl | 15.2 T·m |
| Mms | 59.9 g |
| Pe | 200 W |
| Sensitivity | 101.4 dB |
Alignment hint
| EBP | 118 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 79.2 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Sound 15MB606 | 43 -2 | 0.35 -0.01 | 223 -12 | 4.5 +2 | 101 -0.4 | close | + | |
| Peavey 1502-4DT | 43.1 -1.9 | 0.363 +0.01 | 192 -43 | 2.8 +0.3 | 102 +0.6 | close | 4 Ω vs 8 Ω: amp load changes | + |
| JBL M115-8A | 46 +1 | 0.388 +0.03 | 225 -10 | 5.1 +2.6 | 100.8 -0.6 | close | + | |
| Altec ER-15B | 43 -2 | 0.303 -0.05 | 226.5 -8.5 | 3.3 +0.8 | 101.5 +0.1 | close | + | |
| P.Audio SN-15B | 42.9 -2.1 | 0.296 -0.06 | 234.7 -0.3 | 3.3 +0.8 | 101.5 +0.1 | close | + | |
| Eminence DELTA PRO 15A | 42 -3 | 0.4 +0.05 | 243.5 +8.5 | 4.3 +1.8 | 101.6 +0.2 | close | + | |
| Electro-Voice EVM-15B | 43 -2 | 0.297 -0.06 | 225 -10 | 3.3 +0.8 | 101.5 +0.1 | close | + | |
| Fane STUDIO 15L | 45 = | 0.338 -0.02 | 190 -45 | 4.3 +1.8 | 100.6 -0.8 | close | + | |
| Jensen NEO 15-300 | 42.8 -2.2 | 0.34 -0.01 | 194.3 -40.7 | 2.5 = | 99.2 -2.2 | close | + | |
| Electro-Voice EVM-15BII | 43 -2 | 0.293 -0.06 | 225 -10 | 3.3 +0.8 | 101.6 +0.2 | close | + |
Compare the closest 3 against the G135-8 →
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.