Oberton 18FBR700

18" · 8 Ω · 700 W · 98 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	35.56 Hz
Qts	0.271
Qes	0.277
Qms	12.63
Vas	231.3 L
Sd	1110 cm²
Xmax	8 mm
Re	5.26 Ω
Bl	25.17 T·m
Mms	149.08 g
Pe	700 W
Sensitivity	98 dB

Alignment hint

EBP	128 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 39.8 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
PHL Audio 7321ND	33 -2.56	0.278 +0.01	230 -1.3	8.5 +0.5	98.3 +0.3	close		+
Faital PRO W18N8-1000	35 -0.56	0.273 =	211.8 -19.5	7.8 -0.2	98.8 +0.8	close	Xmax 7.8 mm < 8 mm: lower excursion-limited SPL	+
Beyma 18PW1400FE /S	32 -3.56	0.27 =	228.9 -2.4	10 +2	98 =	close		+
Monacor SP-18/1000HP	35 -0.56	0.282 +0.01	219 -12.3	7.9 -0.1	98.8 +0.8	close	Xmax 7.9 mm < 8 mm: lower excursion-limited SPL	+
18 Sound 18LW1251	35 -0.56	0.27 =	268 +36.7	9 +1	98 =	close		+
Beyma 18PW1400/FE	32 -3.56	0.273 =	228.9 -2.4	9.1 +1.1	98.3 +0.3	close		+
Precision Devices PD188	37.409 +1.85	0.28 +0.01	224.419 -6.88	9.5 +1.5	98.5 +0.5	close		+
PD PD 185N002	36 +0.44	0.297 +0.03	226 -5.3	7.8 -0.2	98.7 +0.7	close	Xmax 7.8 mm < 8 mm: lower excursion-limited SPL	+
Precision Devices PD 185N002	36 +0.44	0.297 +0.03	226 -5.3	7.8 -0.2	98.7 +0.7	close	Xmax 7.8 mm < 8 mm: lower excursion-limited SPL	+
18 Sound 18LW2400	35 -0.56	0.31 +0.04	230 -1.3	9.5 +1.5	98 =	close		+

Compare the closest 3 against the 18FBR700 →

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.