Conrad CPA 15-300

12" · 8 Ω · 300 W · 93.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	43 Hz
Qts	0.559
Qes	0.601
Qms	8.037
Vas	100.5 L
Sd	517 cm²
Xmax	4 mm
Re	7 Ω
Bl	12.7 T·m
Mms	51.1 g
Pe	300 W
Sensitivity	93.8 dB

Alignment hint

EBP	72 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 167.5 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
Siare 31TE vp 1	43.8 +0.8	0.545 -0.01	91.5 -9	4.5 +0.5	95.5 +1.7	close	120 W vs 300 W: lower power handling	+
Siare 31TE vp 2	41.3 -1.7	0.506 -0.05	99.9 -0.6	4.7 +0.7	95.6 +1.8	close	120 W vs 300 W: lower power handling	+
SB Audience BIANCO-120B150	44 +1	0.623 +0.06	103.8 +3.3	6.8 +2.8	93.5 -0.3	close		+
Faital PRO 12PR320	45 +2	0.52 -0.04	96.7 -3.8	7.27 +3.27	96 +2.2	close	16 Ω vs 8 Ω: amp load changes	+
JL Audio 12IB4	40.5 -2.5	0.631 +0.07	112.4 +11.9	6 +2	93.6 -0.2	close	125 W vs 300 W: lower power handling	+
Radian 5212-8	45.1 +2.1	0.489 -0.07	87.9 -12.6	5 +1	94.7 +0.9	close		+
Monacor SP-305I	40 -3	0.48 -0.08	118 +17.5	4 =	93.6 -0.2	close	175 W vs 300 W: lower power handling	+
MCM Electronics 55-2973	42 -1	0.481 -0.08	122.6 +22.1	5 +1	94.5 +0.7	usable	120 W vs 300 W: lower power handling	+
Conrad CPA12-100FR	41.7 -1.3	0.436 -0.12	109.5 +9	4 =	94.5 +0.7	usable	100 W vs 300 W: lower power handling	+
Monacor SP-12 vp nº1	45.8 +2.8	0.458 -0.1	104.3 +3.8	3.9 -0.1	95.6 +1.8	usable	100 W vs 300 W: lower power handling · Xmax 3.9 mm < 4 mm: lower excursion-limited SPL	+

Compare the closest 3 against the CPA 15-300 →

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.