Monacor SPH-450TC vp série

18" · 8 Ω · 350 W · 93.8 dB

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	20 Hz
Qts	0.248
Qes	0.27
Qms	2.97
Vas	480 L
Sd	1250 cm²
Xmax	6.5 mm
Re	7.4 Ω
Bl	31.5 T·m
Mms	289 g
Pe	350 W
Sensitivity	93.8 dB

Alignment hint

EBP	74 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 67.3 L

EBP 50-100: works in either a sealed or ported 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
RCF L 18P200KN	22.3 +2.3	0.265 +0.02	550 +70	9 +2.5	96.4 +2.6	usable		+
Eminence B-52	22.8 +2.8	0.229 -0.02	430 -50	6 -0.5	96.6 +2.8	usable	Xmax 6 mm < 6.5 mm: lower excursion-limited SPL	+
Precision Devices PD184	27 +7	0.253 +0.01	473 -7	9.5 +3	97 +3.2	usable	16 Ω vs 8 Ω: amp load changes	+
Dayton Audio PA460-8 18	26.2 +6.2	0.269 +0.02	473.5 -6.5	6 -0.5	98.6 +4.8	usable	Xmax 6 mm < 6.5 mm: lower excursion-limited SPL	+
Dayton Audio PA460-8 18 PRO WOOFER	26.2 +6.2	0.269 +0.02	473.5 -6.5	6 -0.5	98.6 +4.8	usable	Xmax 6 mm < 6.5 mm: lower excursion-limited SPL	+
Electro-Voice DL18MT	24 +4	0.269 +0.02	580.5 +100.5	5.59 -0.91	96.6 +2.8	usable	Xmax 5.59 mm < 6.5 mm: lower excursion-limited SPL	+
JBL 2245H	20 =	0.24 -0.01	821.2 +341.2	8.5 +2	97.2 +3.4	usable		+
Celestion FTR18-4080FD	26 +6	0.27 +0.02	395.56 -84.44	6 -0.5	97 +3.2	usable	Xmax 6 mm < 6.5 mm: lower excursion-limited SPL	+
Mach 5 Audio UXL-18	18.6 -1.4	0.282 +0.03	285.5 -194.5	10 +3.5	94 +0.2	usable	4 Ω vs 8 Ω: amp load changes	+
Celestion FTR18-4080HD	26 +6	0.272 +0.02	395.6 -84.4	8 +1.5	97.5 +3.7	usable		+

Compare the closest 3 against the SPH-450TC vp série →

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.