JBL M115-8A

15" · 8 Ω · 225 W · 100.8 dB

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	46 Hz
Qts	0.388
Qes	0.42
Qms	5.1
Vas	225 L
Sd	845 cm²
Xmax	5.1 mm
Re	5.5 Ω
Bl	14.2 T·m
Mms	53.3 g
Pe	225 W
Sensitivity	100.8 dB

Alignment hint

EBP	110 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 96.9 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
Eminence 15-3008PS	47.9 +1.9	0.379 -0.01	203.6 -21.4	5.5 +0.4	100.2 -0.6	close		+
Peavey 1505-8 DT v1993	44.2 -1.8	0.371 -0.02	198 -27	5.1 =	100.3 -0.5	close		+
18 Sound 15MB606	43 -3	0.35 -0.04	223 -2	4.5 -0.6	101 +0.2	close	Xmax 4.5 mm < 5.1 mm: lower excursion-limited SPL	+
Eminence DELTALITE 2515/16	42 -4	0.376 -0.01	204 -21	4.8 -0.3	99.5 -1.3	close	Xmax 4.8 mm < 5.1 mm: lower excursion-limited SPL	+
Peavey 1505-4 DT v1993	44.6 -1.4	0.373 -0.02	182 -43	5.1 =	102.1 +1.3	close	4 Ω vs 8 Ω: amp load changes	+
Eminence DELTALITE-II 2515	42 -4	0.376 -0.01	204 -21	4.8 -0.3	99.4 -1.4	close	Xmax 4.8 mm < 5.1 mm: lower excursion-limited SPL	+
Peavey 1505-8 DT	46.5 +0.5	0.389 =	164.3 -60.7	5.1 =	99.5 -1.3	close		+
Peavey 1505-8BW	46.5 +0.5	0.389 =	164.3 -60.7	5.1 =	99.5 -1.3	close		+
Eminence DELTA PRO 15A	42 -4	0.4 +0.01	243.5 +18.5	4.3 -0.8	101.6 +0.8	close	Xmax 4.3 mm < 5.1 mm: lower excursion-limited SPL	+
Eminence KAPPA PRO 15	47 +1	0.381 -0.01	167.7 -57.3	6.4 +1.3	100.2 -0.6	close		+

Compare the closest 3 against the M115-8A →

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.