Audax LFP501

12" · 8 Ω · 150 W · 94.6 dB

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	40 Hz
Qts	0.521
Qes	0.69
Qms	2.13
Vas	138 L
Sd	530 cm²
Xmax	4.5 mm
Re	5.6 Ω
Bl	9.6 T·m
Mms	45.2 g
Pe	150 W
Sensitivity	94.6 dB

Alignment hint

EBP	58 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 163.9 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
Audax PR30ST100	40 =	0.521 =	138 =	4.5 =	94.6 =	close	100 W vs 150 W: lower power handling	+
MCM Electronics 55-2973	42 +2	0.481 -0.04	122.6 -15.4	5 +0.5	94.5 -0.1	close		+
Focal W31B	40 =	0.58 +0.06	125 -13	6 +1.5	95.8 +1.2	close		+
Visaton BZ300 4 Ohms	36 -4	0.483 -0.04	129 -9	5 +0.5	95.7 +1.1	close	4 Ω vs 8 Ω: amp load changes	+
LaVoce LBASS12-15	38 -2	0.48 -0.04	160.93 +22.93	4.7 +0.2	95.5 +0.9	close	100 W vs 150 W: lower power handling	+
MCM Electronics 55-3212	38.5 -1.5	0.477 -0.04	122.6 -15.4	4.7 +0.2	96.6 +2	close	4 Ω vs 8 Ω: amp load changes · 100 W vs 150 W: lower power handling	+
Monacor SP-305I	40 =	0.48 -0.04	118 -20	4 -0.5	93.6 -1	close	Xmax 4 mm < 4.5 mm: lower excursion-limited SPL	+
Eminence LEGEND BP122 8 Ohms	35 -5	0.537 +0.02	157.4 +19.4	6.2 +1.7	94.2 -0.4	close		+
Conrad PA 12	42.9 +2.9	0.462 -0.06	129.2 -8.8	4 -0.5	95.2 +0.6	close	Xmax 4 mm < 4.5 mm: lower excursion-limited SPL	+
Celestion PULSE XL 12.20	35.1 -4.9	0.503 -0.02	153.3 +15.3	8.3 +3.8	94.2 -0.4	close		+

Compare the closest 3 against the LFP501 →

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.