Radian 5215B OEM

15" · 8 Ω · 625 W · 102.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	42 Hz
Qts	0.204
Qes	0.22
Qms	2.86
Vas	205 L
Sd	880 cm²
Xmax	5.5 mm
Re	5 Ω
Bl	21.4 T·m
Mms	76 g
Pe	625 W
Sensitivity	102.4 dB

Alignment hint

EBP	191 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 18.6 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
PD PD 153ER v2018	40 -2	0.215 +0.01	218.8 +13.8	5.4 -0.1	101.4 -1	close	400 W vs 625 W: lower power handling · Xmax 5.4 mm < 5.5 mm: lower excursion-limited SPL	+
Precision Devices PD 153ER v2018	40 -2	0.215 +0.01	218.8 +13.8	5.4 -0.1	101.4 -1	close	400 W vs 625 W: lower power handling · Xmax 5.4 mm < 5.5 mm: lower excursion-limited SPL	+
McCauley 6342	40 -2	0.204 =	200.2 -4.8	4.6 -0.9	101.1 -1.3	close	400 W vs 625 W: lower power handling · Xmax 4.6 mm < 5.5 mm: lower excursion-limited SPL	+
MC Kenzie C15.400BS	40 -2	0.219 +0.02	215 +10	5.4 -0.1	101 -1.4	close	400 W vs 625 W: lower power handling · Xmax 5.4 mm < 5.5 mm: lower excursion-limited SPL	+
RCF MB 15N351	42 =	0.226 +0.02	191 -14	6 +0.5	101.2 -1.2	close		+
RCF CX 15N351	42 =	0.226 +0.02	191 -14	5.3 -0.2	101.2 -1.2	close	450 W vs 625 W: lower power handling · Xmax 5.3 mm < 5.5 mm: lower excursion-limited SPL	+
Beyma 15"P80Nd	39 -3	0.21 +0.01	184 -21	7.5 +2	101 -1.4	close		+
Radian 5215B oem2	42 =	0.247 +0.04	197 -8	5.5 =	100.6 -1.8	close		+
Radian 5215B oem3	42 =	0.247 +0.04	197 -8	5.5 =	100.6 -1.8	close		+
Electro-Voice EVX-155	35.4 -6.6	0.212 +0.01	220 +15	6.4 +0.9	100.5 -1.9	close		+

Compare the closest 3 against the 5215B OEM →

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.