Eminence KAPPA 18 A

18" · 8 Ω · 500 W · 95.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	28 Hz
Qts	0.408
Qes	0.43
Qms	7.84
Vas	475.5 L
Sd	1140.1 cm²
Xmax	4.8 mm
Re	7.82 Ω
Bl	19.9 T·m
Mms	123.8 g
Pe	500 W
Sensitivity	95.9 dB

Alignment hint

EBP	65 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 237.3 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
Dibeisi PS1805-8	27.1 -0.9	0.4 -0.01	473.8 -1.7	7 +2.2	96.1 +0.2	close	250 W vs 500 W: lower power handling	+
Beyma SM118	30 +2	0.421 +0.01	430 -45.5	5.5 +0.7	97.2 +1.3	close		+
Fane 18-500 TLHP	29 +1	0.403 =	521 +45.5	6.3 +1.5	98.2 +2.3	close		+
Mach 5 Audio MAC MAH CWA46	27 -1	0.448 +0.04	470.3 -5.2	10 +5.2	96.2 +0.3	close		+
McCauley 6260-8	28 =	0.379 -0.03	391 -84.5	8 +3.2	96.7 +0.8	close		+
Celestion G18-200	29.6 +1.6	0.364 -0.04	518.5 +43	5 +0.2	97.9 +2	close	200 W vs 500 W: lower power handling	+
Monacor SPA-45PA	29 +1	0.457 +0.05	440 -35.5	4 -0.8	96.5 +0.6	close	300 W vs 500 W: lower power handling · Xmax 4 mm < 4.8 mm: lower excursion-limited SPL	+
Beyma 18LX60	27 -1	0.368 -0.04	500 +24.5	9 +4.2	97.7 +1.8	close		+
TAD TL-1801	26 -2	0.372 -0.04	500 +24.5	3.8 -1	96.3 +0.4	close	200 W vs 500 W: lower power handling · Xmax 3.8 mm < 4.8 mm: lower excursion-limited SPL	+
SB Audience BIANCO-18SW450 v2020	27 -1	0.375 -0.03	423 -52.5	9 +4.2	97.2 +1.3	close		+

Compare the closest 3 against the KAPPA 18 A →

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.