Alpine subwoofers

Thiele/Small parameters of Alpine subwoofers (8″, 10″, 12″, 15″) and a recommended sealed and ported box for every model, in a free sub box calculator.

Search Size Voice coils Ω per coil Qts

61 models

Model	Size	Voice coils	Fs, Hz	Qts	Vas, ft³	Xmax, in	RMS, W
R2-W8D2	8″	dual 2 Ω	42	0.49	0.36	0.47	350
R2-W8D4	8″	dual 4 Ω	43	0.54	0.37	0.47	350
S2-W8D2	8″	dual 2 Ω	46.5	0.58	0.25	0.51	300
S2-W8D4	8″	dual 4 Ω	47.9	0.66	0.26	0.51	300
SWG-844 (Type-G)	8″	4 Ω	34	0.42	1.18	0.31	120
SWR-8D2 (Type-R)	8″	dual 2 Ω	40	0.50	0.37	0.47	350
SWR-8D4 (Type-R)	8″	dual 4 Ω	42	0.57	0.36	0.47	350
SWR-823D (Type-R)	8″	dual 2 Ω	38	0.51	0.42	0.55	350
SWR-843D (Type-R)	8″	dual 4 Ω	40	0.56	0.42	0.55	350
R-W10D2	10″	dual 2 Ω	30	0.47	0.74	0.79	750
R-W10D4	10″	dual 4 Ω	31	0.55	0.71	0.79	750
R2-W10D2	10″	dual 2 Ω	31	0.47	0.64	0.79	750
R2-W10D4	10″	dual 4 Ω	32	0.48	0.64	0.79	750
RS-W10D2 (R-Series shallow)	10″	dual 2 Ω	30	0.95	0.73	0.79	600
RS-W10D4 (R-Series shallow) !	10″	dual 4 Ω	31	1.29	0.82	0.79	600
S-W10D2	10″	dual 2 Ω	33	0.43	0.86	0.59	600
S-W10D4	10″	dual 4 Ω	34	0.45	0.87	0.59	600
S2-W10D2	10″	dual 2 Ω	31.1	0.40	0.87	0.59	600
S2-W10D4	10″	dual 4 Ω	32	0.41	0.88	0.59	600
SWA-10S4 (Atom)	10″	4 Ω	32	0.42	1.45	0.39	250
SWE-1044E (Type-E)	10″	4 Ω	34	0.50	1.73	0.33	150
SWG-1044 (Type-G)	10″	4 Ω	33	0.34	2.30	0.31	150
SWR-10D2 (Type-R)	10″	dual 2 Ω	31	0.51	0.64	0.79	1,000
SWR-10D4 (Type-R)	10″	dual 4 Ω	32	0.54	0.64	0.79	1,000
SWR-1022D (Type-R)	10″	dual 2 Ω	31	0.50	0.71	0.71	500
SWR-1023D (Type-R)	10″	dual 2 Ω	29	0.50	0.92	0.79	600
SWR-1042D (Type-R)	10″	dual 4 Ω	33	0.53	0.71	0.72	500
SWR-1043D (Type-R)	10″	dual 4 Ω	31	0.53	0.74	0.79	600
SWR-T10 (Type-R thin)	10″	4 Ω	32.5	0.53	0.71	0.59	600
SWS-10D2 (Type-S)	10″	dual 2 Ω	35	0.49	0.88	0.59	500
SWS-10D4 (Type-S)	10″	dual 4 Ω	35	0.46	0.88	0.59	500
SWT-10S2 (Type-R thin)	10″	2 Ω	27	0.41	1.57	0.43	350
SWT-10S4 (Type-R thin)	10″	4 Ω	30	0.46	1.35	0.43	350
X-W10D4	10″	dual 4 Ω	31	0.44	0.81	0.94	900
R-W12D2	12″	dual 2 Ω	27	0.50	1.80	0.79	750
R-W12D4	12″	dual 4 Ω	28	0.56	1.70	0.79	750
R2-W12D2	12″	dual 2 Ω	29	0.41	1.30	0.79	750
R2-W12D4	12″	dual 4 Ω	30	0.51	1.16	0.79	750
RS-W12D2 (R-Series shallow) !	12″	dual 2 Ω	28	0.98	1.48	0.79	600
RS-W12D4 (R-Series shallow) !	12″	dual 4 Ω	29	1.00	1.55	0.79	600
S-W12D4	12″	dual 4 Ω	31	0.52	1.64	0.59	600
S2-W12D2	12″	dual 2 Ω	26.6	0.43	1.95	0.59	600
S2-W12D4	12″	dual 4 Ω	28.8	0.44	1.82	0.59	600
SWA-12S4 (Atom)	12″	4 Ω	30	0.49	2.39	0.39	250
SWE-1243E (Type-E)	12″	4 Ω	28	0.38	2.65	0.39	250
SWE-1244E (Type-E)	12″	4 Ω	31	0.52	3.62	0.30	200
SWG-1244 (Type-G)	12″	4 Ω	28	0.38	2.65	0.39	250
SWR-12D2 (Type-R)	12″	dual 2 Ω	27	0.44	1.62	0.79	1,000
SWR-12D4 (Type-R)	12″	dual 4 Ω	28	0.48	1.62	0.79	1,000
SWR-1222D (Type-R)	12″	dual 2 Ω	28	0.42	1.59	0.71	500
SWR-1223D (Type-R)	12″	dual 2 Ω	28	0.47	1.52	0.79	600
SWR-1242D (Type-R)	12″	dual 4 Ω	29	0.47	1.59	0.72	500
SWR-1243D (Type-R)	12″	dual 4 Ω	31	0.53	1.34	0.79	600
SWR-T12 (Type-R thin)	12″	4 Ω	32	0.68	1.17	0.59	600
SWS-12D2 (Type-S)	12″	dual 2 Ω	34	0.61	1.55	0.59	500
SWS-12D4 (Type-S)	12″	dual 4 Ω	34	0.56	1.55	0.59	500
X-W12D4	12″	dual 4 Ω	27	0.56	1.98	0.94	900
SWR-1522D (Type-R)	15″	dual 2 Ω	22	0.41	3.53	0.81	750
SWR-1542D (Type-R)	15″	dual 4 Ω	23	0.45	3.53	0.81	750
SWS-15D2 (Type-S)	15″	dual 2 Ω	27	0.48	3.78	0.59	500
SWS-15D4 (Type-S)	15″	dual 4 Ω	27	0.44	3.78	0.59	500

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