B&C 18 DS 115

18" · 8 Ω · 1700 W · 97.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	30 Hz
Qts	0.2
Qes	0.21
Qms	4.3
Vas	168 L
Sd	1210 cm²
Xmax	7.5 mm
Re	5 Ω
Bl	39.3 T·m
Mms	343.8 g
Pe	1700 W
Sensitivity	97.4 dB

Alignment hint

EBP	143 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 14.6 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
B&C 18DS115	30 =	0.2 =	168 =	16.5 +9	98 +0.6	close		+
Beyma 18QLEX1600/Fe	30 =	0.231 +0.03	195 +27	8.3 +0.8	97.2 -0.2	close		+
B&C 18DS115	30 =	0.17 -0.03	177 +9	16.5 +9	97 -0.4	close	4 Ω vs 8 Ω: amp load changes	+
Beyma 18QLEX1600Fe	30 =	0.23 +0.03	195 +27	13 +5.5	97 -0.4	close		+
Cerwin-Vega STOKER 18D2	31 +1	0.191 -0.01	163.7 -4.3	7 -0.5	102.7 +5.3	close	2 Ω vs 8 Ω: amp load changes · Xmax 7 mm < 7.5 mm: lower excursion-limited SPL	+
Fane COLOSSUS 18-1500	33.5 +3.5	0.25 +0.05	175 +7	8.1 +0.6	97.8 +0.4	usable		+
B&C 18DS100	32 +2	0.24 +0.04	157 -11	14 +6.5	98 +0.6	usable	4 Ω vs 8 Ω: amp load changes	+
PD PD 1850	30 =	0.212 +0.01	249 +81	6.9 -0.6	98.5 +1.1	usable	800 W vs 1700 W: lower power handling · Xmax 6.9 mm < 7.5 mm: lower excursion-limited SPL	+
Precision Devices PD 1850	30 =	0.212 +0.01	249 +81	6.9 -0.6	98.5 +1.1	usable	800 W vs 1700 W: lower power handling · Xmax 6.9 mm < 7.5 mm: lower excursion-limited SPL	+
Beyma 18QLEX1600Fe	31 +1	0.25 +0.05	177.2 +9.2	13 +5.5	96 -1.4	usable	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the 18 DS 115 →

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.