RCF L 12P48

12" · 8 Ω · 75 W · 90.6 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	19.5 Hz
Qts	0.421
Qes	0.44
Qms	10
Vas	270 L
Sd	483 cm²
Xmax	5.5 mm
Re	5 Ω
Bl	10.6 T·m
Mms	80.7 g
Pe	75 W
Sensitivity	90.6 dB

Alignment hint

EBP	44 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 148.3 L

EBP < 50: favours a sealed (closed) 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
RCF L12P48	19.5 =	0.43 +0.01	270 =	5.5 =	88.3 -2.3	close		+
SB Acoustics SB34NRX75-6	19 -0.5	0.397 -0.02	260 -10	11 +5.5	91 +0.4	close		+
Audiotechnology FLEXUNIT 12D775210KAP Custom	19 -0.5	0.388 -0.03	340 +70	8.6 +3.1	91.1 +0.5	close		+
Siare 31SPCT vp jmp norm	19.3 -0.2	0.399 -0.02	254 -16	4 -1.5	88.5 -2.1	close	Xmax 4 mm < 5.5 mm: lower excursion-limited SPL	+
Davis 31ST12M	24 +4.5	0.399 -0.02	260 -10	8.9 +3.4	91.6 +1	usable		+
Davis 31ST12M v2011	24 +4.5	0.399 -0.02	260 -10	8.9 +3.4	91.6 +1	usable		+
Audiotechnology FLEXUNIT 12B775210KAP Custom	19 -0.5	0.382 -0.04	340 +70	8.6 +3.1	91.2 +0.6	usable		+
Max Speaker PV-1230 8 Ohms	20 +0.5	0.452 +0.03	317 +47	4 -1.5	90.5 -0.1	usable	Xmax 4 mm < 5.5 mm: lower excursion-limited SPL	+
SB Acoustics SB34NRX75-6 vp	22.2 +2.7	0.444 +0.02	240 -30	11 +5.5	92 +1.4	usable		+
Audax 180040A	22.4 +2.9	0.392 -0.03	239.6 -30.4	8 +2.5	88.7 -1.9	usable	16 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the L 12P48 →

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.