Precision Devices PD 1845-1N

18" · 8 Ω · 1500 W · 97.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	34.1 Hz
Qts	0.323
Qes	0.333
Qms	10.961
Vas	176 L
Sd	1158.1 cm²
Xmax	9.5 mm
Re	4.7 Ω
Bl	26.5 T·m
Mms	232.7 g
Pe	1500 W
Sensitivity	97.5 dB

Alignment hint

EBP	102 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 46.4 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 1845-1N	34.1 =	0.323 =	176 =	9.5 =	97.5 =	close		+
Faital PRO 18HP1030	35 +0.9	0.32 =	172.2 -3.8	12.45 +2.95	98 +0.5	close	4 Ω vs 8 Ω: amp load changes	+
Faital PRO 18HP1060	35 +0.9	0.33 +0.01	184.4 +8.4	12.45 +2.95	98 +0.5	close	4 Ω vs 8 Ω: amp load changes	+
B&C 18TBW100	33 -1.1	0.32 =	181.5 +5.5	12 +2.5	96 -1.5	close	4 Ω vs 8 Ω: amp load changes	+
Oberton 18XB1301DS	35.7 +1.6	0.302 -0.02	172.9 -3.1	12 +2.5	97.5 =	close		+
LaVoce SAF184.50	35 +0.9	0.329 +0.01	162 -14	9.2 -0.3	96.5 -1	close	Xmax 9.2 mm < 9.5 mm: lower excursion-limited SPL	+
Fane COLOSSUS 18XT5N	36 +1.9	0.331 +0.01	185 +9	8.4 -1.1	97.4 -0.1	close	Xmax 8.4 mm < 9.5 mm: lower excursion-limited SPL	+
18 Sound 18LW2420	34 -0.1	0.31 -0.01	208 +32	10 +0.5	98 +0.5	close	4 Ω vs 8 Ω: amp load changes	+
Oberton 18XB700	36.1 +2	0.304 -0.02	183.22 +7.22	9 -0.5	98 +0.5	close	1000 W vs 1500 W: lower power handling · Xmax 9 mm < 9.5 mm: lower excursion-limited SPL	+
Oberton 18NXB1600	32.37 -1.73	0.303 -0.02	173.11 -2.89	13.5 +4	97 -0.5	close		+

Compare the closest 3 against the PD 1845-1N →

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.