Altec 414-8E

12" · 8 Ω · 150 W · 97.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	30.3 Hz
Qts	0.195
Qes	0.2
Qms	7.31
Vas	224 L
Sd	507.5 cm²
Xmax	4 mm
Re	6.4 Ω
Bl	16.5 T·m
Mms	44.5 g
Pe	150 W
Sensitivity	97.9 dB

Alignment hint

EBP	152 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 18.4 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
Altec 414-8C	30.2 -0.1	0.204 +0.01	230.2 +6.2	4 =	97.5 -0.4	close		+
EMS B12 MKII	30 -0.3	0.174 -0.02	227 +3	4.6 +0.6	98.3 +0.4	close	100 W vs 150 W: lower power handling	+
Audax PR33S66	30 -0.3	0.169 -0.03	214.4 -9.6	3.8 -0.2	98.2 +0.3	close	Xmax 3.8 mm < 4 mm: lower excursion-limited SPL	+
EMS B12	31 +0.7	0.168 -0.03	227 +3	4.4 +0.4	98.8 +0.9	close	100 W vs 150 W: lower power handling	+
Audax PR330M0 v2014	26 -4.3	0.203 +0.01	208 -16	4 =	95.6 -2.3	close		+
Fluxmag 1201-LB	28.9 -1.4	0.163 -0.03	196.2 -27.8	4 =	98.4 +0.5	close	100 W vs 150 W: lower power handling	+
Altec 414 Z	32 +1.7	0.219 +0.02	263 +39	4 =	96.2 -1.7	close	16 Ω vs 8 Ω: amp load changes	+
Beyma 12XA30/ND	35 +4.7	0.21 +0.01	172 -52	4 =	97.2 -0.7	usable		+
Monacor SP-330PAX	33 +2.7	0.238 +0.04	190 -34	4.5 +0.5	97.4 -0.5	usable		+
EMS LB12EX_14V	34 +3.7	0.207 +0.01	200 -24	3 -1	96 -1.9	usable	16 Ω vs 8 Ω: amp load changes · 40 W vs 150 W: lower power handling · Xmax 3 mm < 4 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 414-8E →

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.