Peerless FSL-1225R02-08

12" · 8 Ω · 350 W · 98 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	59 Hz
Qts	0.407
Qes	0.45
Qms	4.31
Vas	59.4 L
Sd	547.4 cm²
Xmax	2.5 mm
Re	5.45 Ω
Bl	15.2 T·m
Mms	51.5 g
Pe	350 W
Sensitivity	98 dB

Alignment hint

EBP	131 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 29.4 L

EBP > 100: favours a ported (bass-reflex) 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
Celestion BN12-300S4	61.2 +2.2	0.408 =	56.9 -2.5	2.5 =	101.2 +3.2	close	4 Ω vs 8 Ω: amp load changes	+
Radian 5212B	62 +3	0.42 +0.01	58.4 -1	5.4 +2.9	98.2 +0.2	close		+
Beyma SM112 vp	57.8 -1.2	0.391 -0.02	64.6 +5.2	4.2 +1.7	97.7 -0.3	close	250 W vs 350 W: lower power handling	+
Fertin Acoustics LB 31 SONO	59.5 +0.5	0.407 =	70 +10.6	4 +1.5	97.5 -0.5	close	200 W vs 350 W: lower power handling	+
RCF L 12/568H	58 -1	0.409 =	72 +12.6	4 +1.5	98.1 +0.1	close	200 W vs 350 W: lower power handling	+
RCF L12/568H	58.8 -0.2	0.41 =	72 +12.6	4 +1.5	97.1 -0.9	close	100 W vs 350 W: lower power handling	+
Celestion TF 1225E	60.7 +1.7	0.414 +0.01	50.8 -8.6	3.5 +1	96.8 -1.2	close		+
Faital PRO 12PR310-8	54 -5	0.396 -0.01	62.8 +3.4	4.9 +2.4	97.5 -0.5	close		+
Fane COLOSSUS 12MBN	55 -4	0.396 -0.01	63 +3.6	5.5 +3	97.4 -0.6	close		+
LaVoce FSF122.02	57 -2	0.374 -0.03	69.5 +10.1	3 +0.5	98.4 +0.4	close	150 W vs 350 W: lower power handling	+

Compare the closest 3 against the FSL-1225R02-08 →

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.