Falcon Acoustics B139 SP1044 REMPLACEMENT

10" · 8 Ω · 150 W · 89.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	10"
Impedance	8 Ω
Fs	25 Hz
Qts	0.366
Qes	0.39
Qms	6
Vas	127 L
Sd	354 cm²
Xmax	6 mm
Re	7.2 Ω
Bl	12.8 T·m
Mms	56.1 g
Pe	150 W
Sensitivity	89.5 dB

Alignment hint

EBP	64 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 46.5 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
Dayton Audio RS270-8	24.9 -0.1	0.401 +0.04	120.5 -6.5	6 =	88.2 -1.3	close	100 W vs 150 W: lower power handling	+
Audiotechnology 10B772510KAP	25 =	0.415 +0.05	128 +1	8.6 +2.6	89.7 +0.2	close		+
Scan-Speak 26W/8534G00	25 =	0.368 =	153 +26	6 =	91.5 +2	close	80 W vs 150 W: lower power handling	+
Dayton Audio SD270-88 v2009	25 =	0.379 +0.01	110.4 -16.6	6 =	92.1 +2.6	close	4 Ω vs 8 Ω: amp load changes · 80 W vs 150 W: lower power handling	+
KEF B139 SP1044	25 =	0.373 +0.01	164 +37	6 =	90.9 +1.4	close	50 W vs 150 W: lower power handling	+
Vifa PLW 26 452/8	26 +1	0.319 -0.05	130 +3	6.5 +0.5	91.3 +1.8	close	100 W vs 150 W: lower power handling	+
Peerless 850146	22.6 -2.4	0.346 -0.02	144.4 +17.4	7.5 +1.5	89.8 +0.3	close		+
Eton 11-581/50HEX vp	25 =	0.364 =	99.8 -27.2	5 -1	89.9 +0.4	close	Xmax 5 mm < 6 mm: lower excursion-limited SPL	+
Scan-Speak 26W/8534G00 v2011	23 -2	0.402 +0.04	150 +23	6 =	89.8 +0.3	close	80 W vs 150 W: lower power handling	+
Peerless CSX 257 H	22.6 -2.4	0.346 -0.02	144.4 +17.4	9 +3	89.8 +0.3	close		+

Compare the closest 3 against the B139 SP1044 REMPLACEMENT →

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.