Altec 3124

12" · 8 Ω · 250 W · 92.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	26 Hz
Qts	0.288
Qes	0.32
Qms	2.92
Vas	186.9 L
Sd	505.8 cm²
Xmax	6.4 mm
Re	6.6 Ω
Bl	15.6 T·m
Mms	71.9 g
Pe	250 W
Sensitivity	92.9 dB

Alignment hint

EBP	81 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 37.2 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
Great Plains Audio 3124 GPA	26 =	0.288 =	186.9 =	6.4 =	93.1 +0.2	close		+
Eton 12-680/A8/62 HEX SYMPHONIE II	26 =	0.296 +0.01	173 -13.9	6 -0.4	92.8 -0.1	close	Xmax 6 mm < 6.4 mm: lower excursion-limited SPL	+
Axon 12K01	25 -1	0.289 =	191.8 +4.9	6.7 +0.3	95.4 +2.5	close	4 Ω vs 8 Ω: amp load changes · 125 W vs 250 W: lower power handling	+
Visaton TIW300	25 -1	0.282 -0.01	160 -26.9	9.7 +3.3	92.9 =	close		+
TVM ARN 312-00/4	22 -4	0.289 =	206 +19.1	6.4 =	93.8 +0.9	close	4 Ω vs 8 Ω: amp load changes · 100 W vs 250 W: lower power handling	+
Scan-Speak 32W/4878T01	23 -3	0.286 =	170 -16.9	7 +0.6	94.5 +1.6	close	4 Ω vs 8 Ω: amp load changes · 150 W vs 250 W: lower power handling	+
STX W.32.500.8.MC	25 -1	0.299 +0.01	155 -31.9	7.5 +1.1	92.1 -0.8	close		+
Visaton WS33NG	30 +4	0.308 +0.02	190 +3.1	8 +1.6	94.5 +1.6	close		+
Dayton Audio ST305-8 Séries II	26.2 +0.2	0.334 +0.05	164 -22.9	8 +1.6	92.3 -0.6	close		+
Monacor SPH-300KE vp1	26.5 +0.5	0.357 +0.07	175 -11.9	6.5 +0.1	92.3 -0.6	close	120 W vs 250 W: lower power handling	+

Compare the closest 3 against the 3124 →

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.