Focal AUDITOR RSB-300

12" · 8 Ω · 300 W · 87.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	25 Hz
Qts	0.466
Qes	0.52
Qms	4.5
Vas	93 L
Sd	471 cm²
Xmax	10.2 mm
Re	6.4 Ω
Bl	16.2 T·m
Mms	135.5 g
Pe	300 W
Sensitivity	87.4 dB

Alignment hint

EBP	48 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 71.4 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
JL Audio 12W1V2-8	24.98 -0.02	0.458 -0.01	100.15 +7.15	9.5 -0.7	86.8 -0.6	close	Xmax 9.5 mm < 10.2 mm: lower excursion-limited SPL	+
Infinity REFERENCE 1240W	25.4 +0.4	0.47 =	84.4 -8.6	11.5 +1.3	86.3 -1.1	close	4 Ω vs 8 Ω: amp load changes	+
Infinity REFERENCE 1250W	25.4 +0.4	0.47 =	84.4 -8.6	11.5 +1.3	86.3 -1.1	close	4 Ω vs 8 Ω: amp load changes	+
JL Audio 12W6V2-D4	25 =	0.45 -0.02	79.9 -13.1	12.7 +2.5	86.9 -0.5	close		+
Dayton Audio RSS315HF-4	25 =	0.489 +0.02	85.1 -7.9	10.1 -0.1	89.4 +2	close	4 Ω vs 8 Ω: amp load changes · Xmax 10.1 mm < 10.2 mm: lower excursion-limited SPL	+
Ground Zero GZUW 300SQ	25.3 +0.3	0.423 -0.04	86.6 -6.4	12.9 +2.7	88 +0.6	close		+
Dayton Audio RSS315HFA-8 v2016	22.2 -2.8	0.444 -0.02	97.2 +4.2	11 +0.8	85.8 -1.6	close		+
Infinity KAPPA PERFECT 12.1	23.32 -1.68	0.44 -0.03	99.97 +6.97	14.15 +3.95	86.2 -1.2	close	4 Ω vs 8 Ω: amp load changes	+
JL Audio 13W6V2-D4	24.3 -0.7	0.434 -0.03	111.6 +18.6	10.6 +0.4	88.3 +0.9	close		+
CSS Audio TRIO12 vp	22 -3	0.429 -0.04	97 +4	10 -0.2	88.5 +1.1	close	Xmax 10 mm < 10.2 mm: lower excursion-limited SPL	+

Compare the closest 3 against the AUDITOR RSB-300 →

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.