Conrad CPA15-300

15" · 8 Ω · 300 W · 97.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	36.9 Hz
Qts	0.357
Qes	0.37
Qms	10.21
Vas	161.6 L
Sd	835 cm²
Xmax	5.7 mm
Re	5.4 Ω
Bl	19.5 T·m
Mms	112.5 g
Pe	300 W
Sensitivity	97.1 dB

Alignment hint

EBP	100 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 55.3 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
Monacor SP-38A/500BS	37 +0.1	0.35 -0.01	168 +6.4	6 +0.3	96.7 -0.4	close		+
BMS 15CN680	39 +2.1	0.351 -0.01	157.8 -3.8	5.5 -0.2	97.4 +0.3	close	Xmax 5.5 mm < 5.7 mm: lower excursion-limited SPL	+
BMS 15CN682	39 +2.1	0.351 -0.01	157.8 -3.8	5.5 -0.2	97.4 +0.3	close	Xmax 5.5 mm < 5.7 mm: lower excursion-limited SPL	+
Oberton 15CX	38.2 +1.3	0.349 -0.01	163.8 +2.2	6.8 +1.1	97.8 +0.7	close		+
P.Audio S15-100LF	38 +1.1	0.35 -0.01	169.1 +7.5	7.8 +2.1	98 +0.9	close		+
Eminence KAPPA 15 LF	39 +2.1	0.384 +0.03	159 -2.6	5.5 -0.2	97.3 +0.2	close	Xmax 5.5 mm < 5.7 mm: lower excursion-limited SPL	+
Eminence KAPPA 15 LFA	39 +2.1	0.384 +0.03	159 -2.6	5.5 -0.2	97.3 +0.2	close	Xmax 5.5 mm < 5.7 mm: lower excursion-limited SPL	+
Kartesian WOM380_vTLHP-8	36 -0.9	0.39 +0.03	156.6 -5	7 +1.3	96.8 -0.3	close		+
Faital PRO 15FH520	38 +1.1	0.34 -0.02	153.2 -8.4	9.15 +3.45	97 -0.1	close	4 Ω vs 8 Ω: amp load changes	+
PD PD 15BR40	38.7 +1.8	0.34 -0.02	158.3 -3.3	7.9 +2.2	98.1 +1	close		+

Compare the closest 3 against the CPA15-300 →

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.