Celestion AP12

12" · 4 Ω · 80 W · 98.6 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	39 Hz
Qts	0.563
Qes	0.613
Qms	6.87
Vas	159 L
Sd	530.3 cm²
Xmax	1.5 mm
Re	2.7 Ω
Bl	6.7 T·m
Mms	41.3 g
Pe	80 W
Sensitivity	98.6 dB

Alignment hint

EBP	64 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 275.4 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
Pioneer TS-A2503i vp	41 +2	0.579 +0.02	162 +3	5 +3.5	98.2 -0.4	close		+
EMS LB12 MKII vp JTR1	39 =	0.543 -0.02	162 +3	3 +1.5	94.1 -4.5	close	8 Ω vs 4 Ω: amp load changes · 40 W vs 80 W: lower power handling	+
Bozak B-199A 8 Ohms	39 =	0.622 +0.06	180.1 +21.1	2 +0.5	94.8 -3.8	usable	8 Ω vs 4 Ω: amp load changes · 50 W vs 80 W: lower power handling	+
EMS LB12 MKII vp JTR2	37.7 -1.3	0.548 -0.01	173.7 +14.7	3 +1.5	93.9 -4.7	usable	8 Ω vs 4 Ω: amp load changes · 40 W vs 80 W: lower power handling	+
Isophon 37/10 vp	47.1 +8.1	0.542 -0.02	142.5 -16.5	1.8 +0.3	101.1 +2.5	usable	17 W vs 80 W: lower power handling	+
Eminence BETA 12CX	43 +4	0.474 -0.09	161 +2	3.5 +2	97.5 -1.1	usable	8 Ω vs 4 Ω: amp load changes	+
LaVoce LBASS12-15	38 -1	0.48 -0.08	160.93 +1.93	4.7 +3.2	95.5 -3.1	usable	8 Ω vs 4 Ω: amp load changes	+
Goodmans AXIOM 201	42.5 +3.5	0.421 -0.14	157.7 -1.3	2.5 +1	97.5 -1.1	usable	8 Ω vs 4 Ω: amp load changes · 30 W vs 80 W: lower power handling	+
Audax LFP501	40 +1	0.521 -0.04	138 -21	4.5 +3	94.6 -4	usable	8 Ω vs 4 Ω: amp load changes	+
Audax PR30ST100	40 +1	0.521 -0.04	138 -21	4.5 +3	94.6 -4	usable	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the AP12 →

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.