Focal subwoofers

Thiele/Small parameters of Focal subwoofers (5″, 8″, 10″, 11″, 12″, 13″, 16″) and a recommended sealed and ported box for every model, in a free sub box calculator.

Search Size Voice coils Ω per coil Qts

36 models

Model	Size	Voice coils	Fs, Hz	Qts	Vas, ft³	Xmax, in	RMS, W
Utopia Be 13 WS (SVC 4 ohm) !	5″	4 Ω	53.4	0.49	0.19	0.31	75
Expert P 20 F (Flax, SVC 4 ohm)	8″	4 Ω	38.5	0.55	0.42	0.39	250
Flax Evo P 20 FE (SVC 4 ohm)	8″	4 Ω	38.5	0.55	0.42	0.39	250
Flax Evo P 20 FSE (shallow, SVC 4 ohm)	8″	4 Ω	35	1.32	0.32	0.43	200
Slatefiber SUB 20 SF (SVC 4 ohm)	8″	4 Ω	36	0.38	0.42	0.39	200
Utopia Be 21 WX (SVC 4 ohm)	8″	4 Ω	36.6	0.60	0.66	0.33	250
Access 25 A4 (SVC 4 ohm)	10″	4 Ω	23.5	0.51	1.76	0.33	200
Auditor RSB-250 (DVC 4+4 ohm)	10″	dual 4 Ω	29	0.59	1.48	—	250
Expert P 25 F (Flax, SVC 4 ohm)	10″	4 Ω	31	0.46	1.02	0.55	300
Flax Evo P 25 FE (SVC 4 ohm)	10″	4 Ω	31	0.46	1.02	0.55	300
Flax Evo P 25 FSE (shallow, SVC 4 ohm)	10″	4 Ω	30	0.80	0.88	0.43	280
K2 Power E25KX (DVC 4 ohm, predecessor of SUB 25 KXE)	10″	dual 4 Ω	38	0.52	0.71	0.89	600
K2 Power SUB 25 KXE (DVC 4+4 ohm)	10″	dual 4 Ω	38	0.52	0.71	0.89	600
K2 Power SUB 25 KXS (shallow, SVC 4 ohm)	10″	4 Ω	35	0.81	0.64	0.55	350
Performance Sub P 25 DB (DVC 4+4 ohm)	10″	dual 4 Ω	27.5	0.43	1.44	0.33	250
SUB 10 (SVC 4 ohm)	10″	4 Ω	21	0.53	1.59	—	250
SUB 10 DUAL (DVC 4+4 ohm)	10″	dual 4 Ω	25	0.65	1.73	—	250
SUB 10 SLIM (shallow, SVC 4 ohm)	10″	4 Ω	25	0.64	1.31	—	230
Utopia M SUB 10 WM (DVC 4+4 ohm)	10″	dual 4 Ω	31	0.68	0.99	0.67	400
K2 Power 27 KX (SVC 4 ohm)	11″	4 Ω	48	0.91	0.53	0.35	300
Performance Sub P 27 V2 (DVC 4+4 ohm)	11″	dual 4 Ω	38.5	0.63	0.75	0.43	300
Access 30 A4 (SVC 4 ohm)	12″	4 Ω	24.7	0.67	3.07	0.33	250
Auditor RSB-300 (DVC 4+4 ohm)	12″	dual 4 Ω	25	0.47	3.28	—	300
Expert P 30 F (Flax, SVC 4 ohm)	12″	4 Ω	28	0.47	2.47	0.55	400
Flax Evo P 30 FSE (shallow, SVC 4 ohm)	12″	4 Ω	30	1.10	1.48	0.43	300
K2 Power E30KX (DVC 4 ohm, predecessor of SUB 30 KXE)	12″	dual 4 Ω	29	0.45	1.77	0.89	800
K2 Power SUB 30 KXE (DVC 4+4 ohm)	12″	dual 4 Ω	29	0.45	1.77	0.89	800
Performance Sub P 30 (SVC 4 ohm)	12″	4 Ω	31.3	0.51	2.26	0.21	250
Performance SUB P 30 DB (DVC 4 ohm)	12″	dual 4 Ω	29.4	0.43	2.00	0.35	300
SUB 12 (SVC 4 ohm)	12″	4 Ω	24	0.44	3.18	—	300
SUB 12 DUAL (DVC 4+4 ohm)	12″	dual 4 Ω	24	0.57	2.86	—	300
SUB 12 SLIM (shallow, SVC 4 ohm)	12″	4 Ω	24	0.69	2.19	—	280
K2 Power 33 KX (DVC 2+2 ohm)	13″	dual 2 Ω	39	0.73	0.87	0.43	400
Performance Sub P 33 V2 (DVC 4+4 ohm)	13″	dual 4 Ω	28.7	0.54	2.69	0.43	400
Utopia Be 33 WX2 (SVC 4 ohm)	13″	4 Ω	32.5	0.35	2.58	0.35	400
K2 Power 40 KX (DVC 2+2 ohm)	16″	dual 2 Ω	34.6	0.82	2.29	0.43	500

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