PHL Audio 5321M

15" · 8 Ω · 500 W · 98.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	40 Hz
Qts	0.277
Qes	0.3
Qms	3.61
Vas	153.3 L
Sd	892 cm²
Xmax	5.5 mm
Re	5.6 Ω
Bl	23.2 T·m
Mms	115.2 g
Pe	500 W
Sensitivity	98.7 dB

Alignment hint

EBP	133 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 27.8 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
Faital PRO 15HX500	40 =	0.275 =	150.1 -3.2	5.1 -0.4	99.2 +0.5	close	Xmax 5.1 mm < 5.5 mm: lower excursion-limited SPL	+
PHL Audio 5321 Nd	41 +1	0.272 -0.01	150 -3.3	5.2 -0.3	98.9 +0.2	close	Xmax 5.2 mm < 5.5 mm: lower excursion-limited SPL	+
B&C 15NDL88	41 +1	0.28 =	154 +0.7	8 +2.5	99 +0.3	close	4 Ω vs 8 Ω: amp load changes	+
Fane FC-154F01	41 +1	0.287 +0.01	151 -2.3	6.5 +1	99.1 +0.4	close		+
Precision Devices PD152	40 =	0.269 -0.01	170 +16.7	5.5 =	99 +0.3	close	16 Ω vs 8 Ω: amp load changes	+
Fane COLOSSUS 15B600	42 +2	0.278 =	139 -14.3	5.7 +0.2	98.7 =	close		+
JBL 2225H	40 =	0.276 =	169.9 +16.6	5 -0.5	98.5 -0.2	close	Xmax 5 mm < 5.5 mm: lower excursion-limited SPL	+
Sica 15 K 3 PL	40 =	0.27 -0.01	166.1 +12.8	6.5 +1	99.7 +1	close		+
SB Audience ROSSO-15W400	40 =	0.282 =	170.1 +16.8	5.3 -0.2	99.6 +0.9	close	Xmax 5.3 mm < 5.5 mm: lower excursion-limited SPL	+
SICA 15 K3 PL-8	40 =	0.27 -0.01	166.1 +12.8	6.5 +1	97.6 -1.1	close		+

Compare the closest 3 against the 5321M →

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.