Klipsch K31

12" · 8 Ω · 250 W · 94.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	19 Hz
Qts	0.185
Qes	0.193
Qms	4.41
Vas	386 L
Sd	530 cm²
Xmax	5 mm
Re	5.7 Ω
Bl	15.9 T·m
Mms	71.6 g
Pe	250 W
Sensitivity	94.8 dB

Alignment hint

EBP	98 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 28.4 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
Vifa M30W0-49-08	21 +2	0.225 +0.04	400 +14	6 +1	95.2 +0.4	close	100 W vs 250 W: lower power handling	+
SEAS 33F-WKA	22 +3	0.209 +0.02	310 -76	5 =	95 +0.2	usable	70 W vs 250 W: lower power handling	+
AER STUDIO BASS	21 +2	0.237 +0.05	360 -26	5.2 +0.2	94.3 -0.5	usable		+
Monacor SPH-300CTC	18 -1	0.185 =	225 -161	5.4 +0.4	94.6 -0.2	usable	4 Ω vs 8 Ω: amp load changes · 150 W vs 250 W: lower power handling	+
Monacor SPH-300TC v1	23 +4	0.198 +0.01	315 -71	4 -1	95.4 +0.6	usable	120 W vs 250 W: lower power handling · Xmax 4 mm < 5 mm: lower excursion-limited SPL	+
JBL 124A	16 -3	0.137 -0.05	399.3 +13.3	5.1 +0.1	93.7 -1.1	usable	100 W vs 250 W: lower power handling	+
JBL 2203A	16 -3	0.137 -0.05	399.3 +13.3	5.1 +0.1	93.7 -1.1	usable	100 W vs 250 W: lower power handling	+
JBL 2203H	16 -3	0.137 -0.05	399.3 +13.3	5.1 +0.1	93.7 -1.1	usable	100 W vs 250 W: lower power handling	+
Monacor SPH-315	22 +3	0.235 +0.05	330 -56	4.5 -0.5	94.5 -0.3	usable	100 W vs 250 W: lower power handling · Xmax 4.5 mm < 5 mm: lower excursion-limited SPL	+
Siare 31SPCT	18 -1	0.238 +0.05	407 +21	4 -1	92.3 -2.5	usable	120 W vs 250 W: lower power handling · Xmax 4 mm < 5 mm: lower excursion-limited SPL	+

Compare the closest 3 against the K31 →

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.