Precision Devices PD188

18" · 8 Ω · 600 W · 98.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	37.409 Hz
Qts	0.28
Qes	0.289
Qms	8.406
Vas	224.419 L
Sd	1134.11 cm²
Xmax	9.5 mm
Re	5.58 Ω
Bl	26.591 T·m
Mms	146.613 g
Pe	600 W
Sensitivity	98.5 dB

Alignment hint

EBP	129 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 41.7 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
Monacor SP-18/1000HP	35 -2.41	0.282 =	219 -5.42	7.9 -1.6	98.8 +0.3	close	Xmax 7.9 mm < 9.5 mm: lower excursion-limited SPL	+
Faital PRO 18HP1010	35 -2.41	0.31 +0.03	225.9 +1.48	9.75 +0.25	98 -0.5	close	4 Ω vs 8 Ω: amp load changes	+
PHL Audio 7321ND	33 -4.41	0.278 =	230 +5.58	8.5 -1	98.3 -0.2	close	Xmax 8.5 mm < 9.5 mm: lower excursion-limited SPL	+
18 Sound 18LW2400	35 -2.41	0.31 +0.03	230 +5.58	9.5 =	98 -0.5	close		+
Beyma 18PW1400/FE	32 -5.41	0.273 -0.01	228.9 +4.48	9.1 -0.4	98.3 -0.2	close	Xmax 9.1 mm < 9.5 mm: lower excursion-limited SPL	+
Oberton 18FBR700	35.56 -1.85	0.271 -0.01	231.3 +6.88	8 -1.5	98 -0.5	close	Xmax 8 mm < 9.5 mm: lower excursion-limited SPL	+
PD PD 185N002	36 -1.41	0.297 +0.02	226 +1.58	7.8 -1.7	98.7 +0.2	close	Xmax 7.8 mm < 9.5 mm: lower excursion-limited SPL	+
Precision Devices PD 185N002	36 -1.41	0.297 +0.02	226 +1.58	7.8 -1.7	98.7 +0.2	close	Xmax 7.8 mm < 9.5 mm: lower excursion-limited SPL	+
Faital PRO 18HP1022	35 -2.41	0.3 +0.02	204.9 -19.52	9.5 =	98 -0.5	close		+
Beyma 18PW1400FE /S	32 -5.41	0.27 -0.01	228.9 +4.48	10 +0.5	98 -0.5	close		+

Compare the closest 3 against the PD188 →

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.