Polk Audio subwoofers

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

Size

Voice coils

Ω per coil

Qts

54 models

Model	Size	Voice coils	Fs, Hz	Qts	Vas, ft³	Xmax, in	RMS, W	Box, ft³ · Hz
8″ 13 models
db804	8″	4 Ω	47	0.62	0.42	0.24	180	Sealed 0.60 Ported 0.57 · 40
db804DVC	8″	dual 4 Ω	47	0.61	0.45	0.24	180	Sealed 0.60 Ported 0.57 · 40
db840	8″	4 Ω	42	0.56	0.54	0.24	180	Sealed 0.49 Ported 0.57 · 40
db840DVC	8″	dual 4 Ω	43	0.59	0.56	0.24	180	Sealed 0.67 Ported 0.57 · 40
dX8-4	8″	4 Ω	30	0.45	0.50	0.34	200	Sealed 0.32 Ported 0.53 · 33
dX8-8	8″	8 Ω	34	0.55	0.46	0.30	200	Sealed 0.42 Ported 0.53 · 45
DXi804 DVC	8″	dual 4 Ω	43	0.59	0.56	0.24	180	Sealed 0.67 Ported 0.57 · 40
DXi804 SVC	8″	4 Ω	42	0.56	0.54	0.24	180	Sealed 0.49 Ported 0.57 · 40
EX8 (EX Series II)	8″	4 Ω	44.6	0.54	0.65	0.18	125	Sealed 0.57 Ported 0.53 · 41
MM840	8″	4 Ω	35	0.62	0.54	0.75	250	Sealed 0.81 Ported 0.57 · 43
MM840DVC	8″	dual 4 Ω	43	0.56	0.56	0.75	180	Sealed 0.53 Ported 0.57 · 44
MM2084	8″	4 Ω	43	0.65	0.56	0.33	—	Sealed 0.78 Ported 0.57 · 41
MM2084 DVC	8″	dual 4 Ω	43	0.60	0.62	0.30	—	Sealed 0.78 Ported 0.57 · 41
10″ 18 models
db104	10″	4 Ω	37	0.57	0.85	0.30	270	Sealed 0.88 Ported 0.88 · 38
db104DVC	10″	dual 4 Ω	37	0.52	0.85	0.35	270	Sealed 0.64 Ported 0.88 · 38
db1040	10″	4 Ω	35	0.55	1.00	0.30	270	Sealed 0.92 Ported 0.88 · 38
db1040DVC	10″	dual 4 Ω	35	0.62	1.07	0.35	270	Sealed 1.24 Ported 0.88 · 38
dX10-4	10″	4 Ω	28.7	0.49	1.18	0.34	300	Sealed 0.71 Ported 0.95 · 32
dX10-8	10″	8 Ω	31.2	0.64	1.16	0.30	300	Sealed 1.17 Ported 0.92 · 38
DXi104 DVC	10″	dual 4 Ω	35	0.62	1.18	0.73	270	Sealed 1.24 Ported 0.95 · 38
DXi104 SVC	10″	4 Ω	35	0.55	1.00	0.62	270	Sealed 0.92 Ported 0.88 · 38
EX10 (EX Series II)	10″	4 Ω	32.5	0.45	1.57	0.18	150	Sealed 0.74 Ported 1.27 · 36
GXR104	10″	4 Ω	34.4	0.49	2.32	0.24	165	Sealed 1.24 Ported 1.59 · 38
MM100-4	10″	4 Ω	35	0.46	0.78	0.34	400	Sealed 0.46 Ported 0.81 · 38
MM104 (Polk/MOMO)	10″	4 Ω	32	0.47	1.12	0.98	—	Sealed 0.57 Ported 0.88 · 35
MM1040	10″	4 Ω	35	0.45	0.64	0.98	350	Sealed 0.49 Ported 0.88 · 38
MM1040DVC	10″	dual 4 Ω	35	0.49	0.64	0.98	270	Sealed 0.49 Ported 0.88 · 38
MM2104	10″	4 Ω	35	0.48	1.08	0.35	—	Sealed 0.64 Ported 0.88 · 46
MM2104 DVC	10″	dual 4 Ω	38	0.48	0.89	0.37	—	Sealed 0.49 Ported 0.88 · 46
SR104	10″	4 Ω	35	0.47	0.78	0.64	700	Sealed 0.49 Ported 0.85 · 42
SR104DVC	10″	dual 4 Ω	36	0.56	0.78	0.64	700	Sealed 0.74 Ported 0.85 · 42
12″ 19 models
db124	12″	4 Ω	31	0.44	2.22	0.30	360	Sealed 0.95 Ported 1.77 · 34
db124DVC	12″	dual 4 Ω	32	0.50	2.22	0.35	360	Sealed 1.41 Ported 1.77 · 34
db1240	12″	4 Ω	30	0.44	2.54	0.30	360	Sealed 1.09 Ported 2.01 · 33
db1240DVC	12″	dual 4 Ω	30	0.47	2.40	0.35	360	Sealed 1.24 Ported 1.91 · 33
dX12-4	12″	4 Ω	26.3	0.58	2.80	0.34	400	Sealed 1.80 Ported 2.22 · 30
dX12-8	12″	8 Ω	26.7	0.72	3.09	0.30	400	Sealed 1.80 Ported 2.37 · 30
DXi124 DVC	12″	dual 4 Ω	30	0.47	3.10	0.73	360	Sealed 1.62 Ported 2.40 · 33
DXi124 SVC	12″	4 Ω	30	0.44	2.54	0.62	360	Sealed 1.09 Ported 2.01 · 33
DXi1240DVC	12″	dual 4 Ω	30	0.49	2.68	0.71	360	Sealed 1.62 Ported 2.15 · 33
EX12 (EX Series II)	12″	4 Ω	24.5	0.30	4.66	0.18	150	Sealed 0.74 Ported 2.26 · 30
GXR124	12″	4 Ω	25.9	0.47	4.83	0.24	165	Sealed 1.87 Ported 2.44 · 30
MM120-4	12″	4 Ω	30	0.47	2.15	0.34	500	Sealed 1.13 Ported 1.73 · 33
MM124 (Polk/MOMO)	12″	4 Ω	27.5	0.46	2.86	0.98	—	Sealed 1.41 Ported 2.30 · 30
MM1240	12″	4 Ω	35	0.57	1.34	0.98	425	Sealed 1.34 Ported 1.27 · 34
MM1240DVC	12″	dual 4 Ω	35	0.61	1.34	0.98	425	Sealed 1.84 Ported 1.27 · 34
MM2124	12″	4 Ω	31	0.52	2.25	0.37	—	Sealed 1.62 Ported 1.80 · 34
MM2124 DVC	12″	dual 4 Ω	31	0.55	2.25	0.37	—	Sealed 1.84 Ported 1.80 · 34
SR124	12″	4 Ω	29	0.54	1.87	0.64	700	Sealed 1.52 Ported 1.48 · 32
SR124DVC	12″	dual 4 Ω	30	0.56	1.87	0.64	700	Sealed 1.77 Ported 1.48 · 33
15″ 4 models
MM1540	15″	4 Ω	27	0.50	3.53	0.98	425	Sealed 2.33 Ported 2.83 · 30
MM1540DVC	15″	dual 4 Ω	27	0.50	3.53	0.98	360	Sealed 2.33 Ported 2.83 · 30
MM2154	15″	4 Ω	24	0.47	6.60	0.37	—	Sealed 2.86 Ported 3.74 · 30
MM2154 DVC	15″	dual 4 Ω	24	0.50	6.60	0.37	—	Sealed 2.86 Ported 3.74 · 30

Click a column header to sort. “!” means the model’s published specs don’t add up; details are on its page.

Qts: under 0.4 — ported 0.4–0.6 — either over 0.6 — sealed · “Box” — recommended sealed and ported net volume and ported tuning.