Quantum Audio subwoofers

Thiele/Small parameters of Quantum 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

31 models

Model	Size	Voice coils	Fs, Hz	Qts	Vas, ft³	Xmax, in	RMS, W	Box, ft³ · Hz
8″ 3 models
QPW3000/8D4	8″	dual 4 Ω	41.1	0.39	0.28	—	350	Sealed 0.28 Ported 0.88 · 41
QW3000/8D4	8″	dual 4 Ω	40.7	0.51	0.26	0.60	—	Sealed 0.28 Ported 0.53 · 45
QWX4000/8D4	8″	dual 4 Ω	51.3	0.41	0.19	0.41	—	Sealed 0.28 Ported 0.46 · 49
10″ 8 models
Q2000/10D	10″	dual 4 Ω	47.8	0.64	0.59	0.44	—	Sealed 1.02 Ported 0.81 · 42
QFW10D4	10″	dual 4 Ω	45.6	0.46	0.63	—	—	Sealed 0.42 Ported 0.74 · 47
QPW3000/10D4	10″	dual 4 Ω	32.7	0.54	0.71	—	750	Sealed 0.60 Ported 0.85 · 40
QSW10F	10″	4 Ω	37.5	0.61	1.16	0.39	—	Sealed 1.24 Ported 0.92 · 38
QW1000/10D4	10″	dual 4 Ω	34.4	0.84	1.38	0.37	—	Sealed 1.20 Ported 1.09 · 38
QW1000/10S4	10″	4 Ω	32	0.92	1.52	0.37	—	Sealed 1.17 Ported 1.20 · 35
QWX2000/10D4	10″	dual 4 Ω	39.4	0.61	0.85	0.51	500	Sealed 1.17 Ported 0.81 · 38
QWX4000/10D4	10″	dual 4 Ω	42.8	0.63	0.42	0.51	—	Sealed 0.67 Ported 0.78 · 38
12″ 14 models
Q800/12D	12″	dual 4 Ω	38.6	0.99	2.13	0.40	—	Sealed 1.77 Ported 1.70 · 34
Q800/12S	12″	4 Ω	38.4	0.92	2.04	0.40	—	Sealed 1.77 Ported 1.62 · 34
Q2000/12D	12″	dual 4 Ω	49	0.72	1.10	0.44	—	Sealed 1.62 Ported 1.13 · 35
Q2500/12D	12″	dual 4 Ω	44.2	0.74	1.30	0.50	800	Sealed 1.66 Ported 1.17 · 35
Q3000/12D	12″	dual 4 Ω	42.9	0.57	1.05	0.60	—	Sealed 1.06 Ported 1.17 · 35
QFW12D4	12″	dual 4 Ω	38.7	0.59	1.76	—	—	Sealed 1.80 Ported 1.41 · 34
QPW3000/12D4	12″	dual 4 Ω	30	0.58	1.70	—	750	Sealed 1.84 Ported 1.34 · 33
QSW12F	12″	4 Ω	27.7	0.47	3.15	0.39	—	Sealed 1.62 Ported 2.40 · 30
QW1000/12D4	12″	dual 4 Ω	28.1	0.91	3.80	0.37	—	Sealed 1.87 Ported 2.40 · 31
QW1000/12S4	12″	4 Ω	24.9	0.84	5.12	0.37	—	Sealed 1.87 Ported 2.44 · 30
QW3000/12D4	12″	dual 4 Ω	37.4	0.80	1.13	0.60	—	Sealed 1.87 Ported 1.31 · 34
QW5000/12D4	12″	dual 4 Ω	40.8	0.54	0.84	0.60	—	Sealed 0.74 Ported 1.31 · 34
QWX2000/12D4	12″	dual 4 Ω	35.6	0.66	1.55	0.51	500	Sealed 1.80 Ported 1.27 · 34
QWX4000/12D4	12″	dual 4 Ω	45.5	0.72	0.37	0.51	—	Sealed 0.74 Ported 1.20 · 34
15″ 6 models
Q2000/15D	15″	dual 4 Ω	36	0.88	2.88	0.44	—	Sealed 2.72 Ported 2.30 · 34
Q2500/15D	15″	dual 4 Ω	33.3	0.87	3.58	0.50	—	Sealed 2.83 Ported 2.86 · 34
Q3000/15D	15″	dual 4 Ω	29.4	0.71	3.58	0.60	—	Sealed 2.75 Ported 2.86 · 32
QW3000/15D4	15″	dual 4 Ω	31.2	0.68	2.85	0.60	—	Sealed 2.93 Ported 2.30 · 34
QW5000/15D4	15″	dual 4 Ω	37.8	0.66	1.55	0.60	—	Sealed 2.93 Ported 2.05 · 34
QWX4000/15D4	15″	dual 4 Ω	37.9	0.74	2.21	0.51	—	Sealed 2.83 Ported 1.98 · 34

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.