PHL Audio 5321 Nd

15" · 8 Ω · 500 W · 98.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	41 Hz
Qts	0.272
Qes	0.3
Qms	2.9
Vas	150 L
Sd	892 cm²
Xmax	5.2 mm
Re	5.6 Ω
Bl	23.2 T·m
Mms	112 g
Pe	500 W
Sensitivity	98.9 dB

Alignment hint

EBP	137 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 26 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 -1	0.275 =	150.1 +0.1	5.1 -0.1	99.2 +0.3	close	Xmax 5.1 mm < 5.2 mm: lower excursion-limited SPL	+
PHL Audio 5321M	40 -1	0.277 +0.01	153.3 +3.3	5.5 +0.3	98.7 -0.2	close		+
Fane FC-154F01	41 =	0.287 +0.01	151 +1	6.5 +1.3	99.1 +0.2	close		+
B&C 15NDL88	41 =	0.28 +0.01	154 +4	8 +2.8	99 +0.1	close	4 Ω vs 8 Ω: amp load changes	+
Fane COLOSSUS 15B600	42 +1	0.278 +0.01	139 -11	5.7 +0.5	98.7 -0.2	close		+
Precision Devices PD152	40 -1	0.269 =	170 +20	5.5 +0.3	99 +0.1	close	16 Ω vs 8 Ω: amp load changes	+
McCauley 6244	40 -1	0.272 =	144.4 -5.6	4.6 -0.6	98.4 -0.5	close	Xmax 4.6 mm < 5.2 mm: lower excursion-limited SPL	+
Oberton 15B500	38.2 -2.8	0.268 =	145.82 -4.18	7.25 +2.05	99 +0.1	close		+
Oberton 15NB451	39.57 -1.43	0.257 -0.02	145.21 -4.79	7 +1.8	99 +0.1	close		+
PD PD 152	40 -1	0.266 -0.01	170 +20	5.1 -0.1	99.3 +0.4	close	Xmax 5.1 mm < 5.2 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 5321 Nd →

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.