Precision Devices PD 182

18" · 8 Ω · 600 W · 98.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	28 Hz
Qts	0.238
Qes	0.25
Qms	4.85
Vas	391 L
Sd	1150 cm²
Xmax	8.2 mm
Re	5.9 Ω
Bl	25.2 T·m
Mms	153.2 g
Pe	600 W
Sensitivity	98.7 dB

Alignment hint

EBP	112 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 50 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 182	28 =	0.238 =	391 =	8.2 =	98.7 =	close		+
RCF LF 18X400	28 =	0.255 +0.02	360 -31	9 +0.8	98.6 -0.1	close		+
B&C 18 PZB 46 vp	28.8 +0.8	0.227 -0.01	346.4 -44.6	8.1 -0.1	99 +0.3	close	Xmax 8.1 mm < 8.2 mm: lower excursion-limited SPL	+
Fane COLOSSUS 18B600	29 +1	0.236 =	345 -46	7.2 -1	98.7 =	close	Xmax 7.2 mm < 8.2 mm: lower excursion-limited SPL	+
Faital PRO 18FH510	30 +2	0.26 +0.02	391.4 +0.4	9.45 +1.25	98 -0.7	close	4 Ω vs 8 Ω: amp load changes	+
AE Speakers TD18H+ 8 Ohms	29 +1	0.221 -0.02	390 -1	7 -1.2	99 +0.3	close	Xmax 7 mm < 8.2 mm: lower excursion-limited SPL	+
RCF LF 18G400	28 =	0.273 +0.04	360 -31	9 +0.8	98.3 -0.4	close		+
AE Speakers TD18H+	29 +1	0.221 -0.02	390 -1	7 -1.2	99.7 +1	close	Xmax 7 mm < 8.2 mm: lower excursion-limited SPL	+
RCF LF18G400	28 =	0.27 +0.03	360 -31	9 +0.8	97.5 -1.2	close		+
Celestion FTR18-4080HD	26 -2	0.272 +0.03	395.6 +4.6	8 -0.2	97.5 -1.2	close	Xmax 8 mm < 8.2 mm: lower excursion-limited SPL	+

Compare the closest 3 against the PD 182 →

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.