Monacor SP-15A/400PA

15" · 8 Ω · 400 W · 98 dB

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	35 Hz
Qts	0.274
Qes	0.29
Qms	5.1
Vas	220 L
Sd	855 cm²
Xmax	2.8 mm
Re	6.5 Ω
Bl	21.8 T·m
Mms	96.3 g
Pe	400 W
Sensitivity	98 dB

Alignment hint

EBP	121 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 38.9 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-15/400PA	35 =	0.274 =	220 =	2.8 =	98 =	close		+
Monacor SP-15/300PA	38 +3	0.275 =	232 +12	3 +0.2	99.1 +1.1	close	300 W vs 400 W: lower power handling	+
Celestion NTR15-3018E	35 =	0.261 -0.01	223.5 +3.5	5 +2.2	99.2 +1.2	close		+
Eminence MAGNUM 15 HO	33 -2	0.27 =	241 +21	4.8 +2	97.9 -0.1	close		+
DAS Audio 15G	35 =	0.259 -0.02	225 +5	6 +3.2	98.8 +0.8	close		+
Beyma 15G300	37 +2	0.28 +0.01	234 +14	4 +1.2	99.2 +1.2	close	250 W vs 400 W: lower power handling	+
DAS Audio 15H	35 =	0.287 +0.01	203 -17	6 +3.2	97.8 -0.2	close		+
Mercuriale PTR 385 M0	33 -2	0.264 -0.01	252 +32	3.5 +0.7	98.2 +0.2	close	200 W vs 400 W: lower power handling	+
JBL K145	35 =	0.286 +0.01	243.5 +23.5	4.7 +1.9	97 -1	close	16 Ω vs 8 Ω: amp load changes · 150 W vs 400 W: lower power handling	+
Davis 40XXXL	35.6 +0.6	0.287 +0.01	211.1 -8.9	5.5 +2.7	99.2 +1.2	close	250 W vs 400 W: lower power handling	+

Compare the closest 3 against the SP-15A/400PA →

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.