Precision Devices PD918

18" · 8 Ω · 600 W · 98 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	34.98 Hz
Qts	0.28
Qes	0.3
Qms	5.78
Vas	419.98 L
Sd	1225.42 cm²
Xmax	7 mm
Re	5.73 Ω
Bl	20.9 T·m
Mms	103.98 g
Pe	600 W
Sensitivity	98 dB

Alignment hint

EBP	117 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 78.1 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 18FH510	30 -4.98	0.29 +0.01	411.9 -8.08	9.25 +2.25	98 =	close		+
Beyma 18P80/ND	30 -4.98	0.283 =	411 -8.98	7.5 +0.5	99.8 +1.8	close		+
B&C 18 RXB	33 -1.98	0.282 =	370 -49.98	10 +3	100.3 +2.3	close		+
JBL 2258H	31 -3.98	0.265 -0.02	407 -12.98	8 +1	100.2 +2.2	close		+
Faital PRO 18FH510	30 -4.98	0.26 -0.02	391.4 -28.58	9.45 +2.45	98 =	close	4 Ω vs 8 Ω: amp load changes	+
DAS Audio S1846 vp2	29.6 -5.38	0.298 +0.02	384 -35.98	8 +1	97.7 -0.3	close		+
Electro-Voice EVX-180A	29 -5.98	0.27 -0.01	416 -3.98	6.4 -0.6	99.5 +1.5	close	Xmax 6.4 mm < 7 mm: lower excursion-limited SPL	+
Electro-Voice EVX-180B	29 -5.98	0.27 -0.01	416 -3.98	6.4 -0.6	99.5 +1.5	close	Xmax 6.4 mm < 7 mm: lower excursion-limited SPL	+
Eminence Kappa Pro 18LF2	32 -2.98	0.33 +0.05	391.61 -28.37	8 +1	98 =	close		+
Faital PRO 18FH500	28 -6.98	0.29 +0.01	456.7 +36.72	9.45 +2.45	98 =	close	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the PD918 →

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.