PD PD 1550

15" · 8 Ω · 600 W · 98.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	31 Hz
Qts	0.212
Qes	0.22
Qms	5.55
Vas	242 L
Sd	890 cm²
Xmax	7.4 mm
Re	6.4 Ω
Bl	26.2 T·m
Mms	120.9 g
Pe	600 W
Sensitivity	98.1 dB

Alignment hint

EBP	141 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 23.9 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
Precision Devices PD 1550	31 =	0.212 =	242 =	7.4 =	98.1 =	close		+
18 Sound 15W930	33 +2	0.22 +0.01	240 -2	7.5 +0.1	98 -0.1	close		+
Precision Devices PD1550	31 =	0.21 =	242 =	12 +4.6	99 +0.9	close		+
RCF L 15P200	30 -1	0.23 +0.02	245 +3	5.9 -1.5	97.3 -0.8	close	300 W vs 600 W: lower power handling · Xmax 5.9 mm < 7.4 mm: lower excursion-limited SPL	+
Beyma 15P80/ND	35 +4	0.214 =	217 -25	7.9 +0.5	100.1 +2	close		+
Beyma SM115/K vp2	29.8 -1.2	0.228 +0.02	291 +49	8 +0.6	99 +0.9	close		+
18 Sound 15ND930	36 +5	0.22 +0.01	206 -36	7.5 +0.1	98 -0.1	close		+
Beyma 15GT200 v2	31 =	0.218 +0.01	270 +28	5.4 -2	98.8 +0.7	close	250 W vs 600 W: lower power handling · Xmax 5.4 mm < 7.4 mm: lower excursion-limited SPL	+
JBL 1501FE	29.5 -1.5	0.236 +0.02	217.7 -24.3	6.9 -0.5	97.2 -0.9	close	Xmax 6.9 mm < 7.4 mm: lower excursion-limited SPL	+
Beyma SM115/K vp1	27.6 -3.4	0.222 +0.01	296.7 +54.7	8 +0.6	98.3 +0.2	close		+

Compare the closest 3 against the PD 1550 →

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.