B&C 18TBX100

18" · 4 Ω · 1200 W · 94 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	4 Ω
Fs	30 Hz
Qts	0.31
Qes	0.33
Qms	7
Vas	256 L
Sd	1210 cm²
Xmax	9 mm
Re	3.7 Ω
Bl	22 T·m
Mms	230 g
Pe	1200 W
Sensitivity	94 dB

Alignment hint

EBP	91 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 60.9 L

EBP 50-100: works in either a sealed or ported 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
Lavoce SAF184.03	30 =	0.32 +0.01	260 +4	13 +4	94.9 +0.9	close	8 Ω vs 4 Ω: amp load changes	+
BMS 18S450	29 -1	0.31 =	281 +25	12 +3	95 +1	close	8 Ω vs 4 Ω: amp load changes	+
BMS 18N850vv2	29.8 -0.2	0.33 +0.02	243 -13	12 +3	95 +1	close	8 Ω vs 4 Ω: amp load changes	+
Volt RV4564	26 -4	0.313 =	238 -18	9.6 +0.6	94.3 +0.3	close	8 Ω vs 4 Ω: amp load changes · 750 W vs 1200 W: lower power handling	+
Ciare NDH18_4S	31 +1	0.319 +0.01	239 -17	9.4 +0.4	96.5 +2.5	close	8 Ω vs 4 Ω: amp load changes	+
RCF LF18X401	30 =	0.3 -0.01	274 +18	12 +3	97.5 +3.5	close	8 Ω vs 4 Ω: amp load changes	+
RCF LF18Y402	30 =	0.3 -0.01	274 +18	12 +3	97.5 +3.5	close	8 Ω vs 4 Ω: amp load changes	+
RCF LF 18X401	30 =	0.298 -0.01	274 +18	11.4 +2.4	97.5 +3.5	close	8 Ω vs 4 Ω: amp load changes	+
RCF LF 18N405	30 =	0.324 +0.01	227 -29	10.8 +1.8	96.7 +2.7	close	8 Ω vs 4 Ω: amp load changes	+
Fane COLOSSUS 18-1000	32 +2	0.319 +0.01	236 -20	8.9 -0.1	97 +3	close	8 Ω vs 4 Ω: amp load changes · Xmax 8.9 mm < 9 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 18TBX100 →

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.