Celestion BX15-4085
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 38 Hz |
| Qts | 0.24 |
| Qes | 0.247 |
| Qms | 8.055 |
| Vas | 154.1 L |
| Sd | 850 cm² |
| Xmax | 3.3 mm |
| Re | 5.84 Ω |
| Bl | 25.5 T·m |
| Mms | 115.3 g |
| Pe | 600 W |
| Sensitivity | 98.7 dB |
Alignment hint
| EBP | 154 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 20.1 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 |
|---|---|---|---|---|---|---|---|---|
| Celestion GUITARE | 39 +1 | 0.244 = | 148 -6.1 | 3 -0.3 | 97.4 -1.3 | close | 200 W vs 600 W: lower power handling · Xmax 3 mm < 3.3 mm: lower excursion-limited SPL | + |
| BMS 15N820 v2015 | 39.2 +1.2 | 0.255 +0.02 | 159 +4.9 | 5 +1.7 | 99 +0.3 | close | + | |
| PD PD 158 | 39.9 +1.9 | 0.241 = | 161.9 +7.8 | 5.9 +2.6 | 99.4 +0.7 | close | + | |
| Precision Devices PD 158 | 39.9 +1.9 | 0.241 = | 161.9 +7.8 | 5.9 +2.6 | 99.4 +0.7 | close | + | |
| BMS 15N820 | 39.2 +1.2 | 0.26 +0.02 | 159 +4.9 | 4.5 +1.2 | 98 -0.7 | close | + | |
| RCF LF 15G400 | 37 -1 | 0.247 +0.01 | 164 +9.9 | 6.9 +3.6 | 99.1 +0.4 | close | + | |
| RCF LF 15X400 | 37 -1 | 0.247 +0.01 | 164 +9.9 | 7 +3.7 | 99.1 +0.4 | close | + | |
| Celestion FTR15-4080F | 38 = | 0.249 +0.01 | 163.1 +9 | 6 +2.7 | 97 -1.7 | close | + | |
| MC Kenzie C15.200 | 40 +2 | 0.271 +0.03 | 161 +6.9 | 3.8 +0.5 | 98.9 +0.2 | close | 200 W vs 600 W: lower power handling | + |
| PD PD 153ER | 39 +1 | 0.219 -0.02 | 160 +5.9 | 4.8 +1.5 | 99.6 +0.9 | close | 400 W vs 600 W: lower power handling | + |
Compare the closest 3 against the BX15-4085 →
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.