Celestion BX15-4085HS8

15" · 8 Ω · 400 W · 99.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	35 Hz
Qts	0.27
Qes	0.284
Qms	5.643
Vas	247.6 L
Sd	850 cm²
Xmax	6.5 mm
Re	5.51 Ω
Bl	19 T·m
Mms	84.6 g
Pe	400 W
Sensitivity	99.3 dB

Alignment hint

EBP	123 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 42.3 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
DAS Audio 15G	35 =	0.259 -0.01	225 -22.6	6 -0.5	98.8 -0.5	close	Xmax 6 mm < 6.5 mm: lower excursion-limited SPL	+
Beyma 15WR400 v2020	36 +1	0.299 +0.03	236 -11.6	6.3 -0.2	99 -0.3	close	Xmax 6.3 mm < 6.5 mm: lower excursion-limited SPL	+
Beyma 15"WR400	36 +1	0.3 +0.03	236 -11.6	6.3 -0.2	99 -0.3	close	Xmax 6.3 mm < 6.5 mm: lower excursion-limited SPL	+
Max Speaker PR1566	36 +1	0.296 +0.03	262 +14.4	8.6 +2.1	99.1 -0.2	close		+
RCF L 15/554K	35 =	0.243 -0.03	227 -20.6	8 +1.5	98.7 -0.6	close		+
Faital PRO 15PR400	35 =	0.31 +0.04	248.9 +1.3	5.75 -0.75	99 -0.3	close	4 Ω vs 8 Ω: amp load changes · Xmax 5.75 mm < 6.5 mm: lower excursion-limited SPL	+
Focal AUDIOM 15H	34.9 -0.1	0.277 +0.01	295.9 +48.3	5.8 -0.7	99.7 +0.4	close	225 W vs 400 W: lower power handling · Xmax 5.8 mm < 6.5 mm: lower excursion-limited SPL	+
LaVoce WAF153.02	35 =	0.261 -0.01	244 -3.6	4.6 -1.9	99.7 +0.4	close	Xmax 4.6 mm < 6.5 mm: lower excursion-limited SPL	+
Celestion NTR15-3018E	35 =	0.261 -0.01	223.5 -24.1	5 -1.5	99.2 -0.1	close	Xmax 5 mm < 6.5 mm: lower excursion-limited SPL	+
Beyma 15XA38Nd v2020	38 +3	0.296 +0.03	238 -9.6	6 -0.5	99 -0.3	close	Xmax 6 mm < 6.5 mm: lower excursion-limited SPL	+

Compare the closest 3 against the BX15-4085HS8 →

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.