Great Plains Audio 414-8B (16B)

12" · 8 Ω · 150 W · 95.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	25.6 Hz
Qts	0.22
Qes	0.227
Qms	7.532
Vas	263.1 L
Sd	507.6 cm²
Xmax	4 mm
Re	7.28 Ω
Bl	16.6 T·m
Mms	53.2 g
Pe	150 W
Sensitivity	95.3 dB

Alignment hint

EBP	113 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 28.2 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
Audax LFP502	24 -1.6	0.208 -0.01	267 +3.9	3.5 -0.5	95.4 +0.1	close	Xmax 3.5 mm < 4 mm: lower excursion-limited SPL	+
Audax PR33SM150	24 -1.6	0.208 -0.01	267 +3.9	3.5 -0.5	95.4 +0.1	close	Xmax 3.5 mm < 4 mm: lower excursion-limited SPL	+
Altec 414 Z	32 +6.4	0.219 =	263 -0.1	4 =	96.2 +0.9	close	16 Ω vs 8 Ω: amp load changes	+
Fostex FW 305	25 -0.6	0.254 +0.03	254 -9.1	4.8 +0.8	94.3 -1	close	60 W vs 150 W: lower power handling	+
Audax PR330M0 v2014	26 +0.4	0.203 -0.02	208 -55.1	4 =	95.6 +0.3	close		+
Monacor SPH-300TC vp 1 seule bobine	23 -2.6	0.239 +0.02	290 +26.9	4 =	94.3 -1	close		+
Focal AUDIOM 12VX	23.5 -2.1	0.202 -0.02	238 -25.1	6 +2	94.5 -0.8	close		+
SEAS 33F-WKA MINE	24.8 -0.8	0.236 +0.02	206.1 -57	4.5 +0.5	94.4 -0.9	close	70 W vs 150 W: lower power handling	+
Monacor SPH-300TC	23 -2.6	0.239 +0.02	290 +26.9	4 =	97.3 +2	close	4 Ω vs 8 Ω: amp load changes	+
Monacor SPH-300TC v2	23 -2.6	0.239 +0.02	290 +26.9	4 =	97.3 +2	close	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the 414-8B (16B) →

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.