Hertz subwoofers

Thiele/Small parameters of Hertz 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

41 models

Model	Size	Voice coils	Fs, Hz	Qts	Vas, ft³	Xmax, in	RMS, W
Cento CS 200 S4 (SVC 4 ohm)	8″	4 Ω	40	0.52	0.48	0.35	150
Energy ES 200.5 (SVC 4 ohm)	8″	4 Ω	40	0.50	0.37	0.35	200
Energy ES F20.5 (free-air/shallow, SVC 4 ohm)	8″	4 Ω	52	0.40	0.47	0.20	200
Mille Legend ML 2000.3 (SVC 4 ohm)	8″	4 Ω	40	0.56	0.34	0.51	700
Cento CS 250 S2 (SVC 2 ohm)	10″	2 Ω	30	0.49	1.13	0.49	300
Cento CS 250 S4 (SVC 4 ohm)	10″	4 Ω	30	0.53	1.22	0.49	300
Dieci DS 25.3 (SVC 4 ohm)	10″	4 Ω	36	0.92	1.20	0.35	150
Dieci DS 250.3 (SVC 4 ohm)	10″	4 Ω	36	0.62	1.02	0.39	200
Energy ES 250.5 (SVC 4 ohm)	10″	4 Ω	35	0.61	0.98	0.35	250
Energy ES 250D.5 (DVC 4 ohm)	10″	dual 4 Ω	40	0.66	1.08	0.35	250
Energy ES F25.5 (free-air/shallow, SVC 4 ohm)	10″	4 Ω	39	0.44	1.42	0.24	300
Hi-Energy HX 250 (SVC 4 ohm)	10″	4 Ω	37	0.44	0.85	0.55	450
Hi-Energy HX 250 D (DVC 4+4 ohm)	10″	dual 4 Ω	34	0.37	0.73	0.55	450
Mille Legend ML 2500.3 (SVC 4 ohm)	10″	4 Ω	33	0.60	0.83	0.67	700
Mille Pro MP 250 D2.3 (DVC 2+2 ohm)	10″	dual 2 Ω	30	0.54	0.88	0.67	600
Mille Pro MP 250 D4.3 (DVC 4+4 ohm)	10″	dual 4 Ω	27	0.49	1.09	0.67	600
Mille Pro MPS 250 S2 (shallow, SVC 2 ohm)	10″	2 Ω	28	0.41	0.87	0.66	500
Mille Pro MPS 250 S4 (shallow, SVC 4 ohm)	10″	4 Ω	29	0.48	0.75	0.66	500
SPL Show SX 250D (DVC 2+2 ohm)	10″	dual 2 Ω	51	0.42	0.39	0.55	600
Cento CS 300 S2 (SVC 2 ohm)	12″	2 Ω	25	0.46	3.08	0.49	350
Cento CS 300 S4 (SVC 4 ohm)	12″	4 Ω	25	0.47	3.30	0.49	350
Dieci DS 30.3 (SVC 4 ohm)	12″	4 Ω	32	0.62	2.47	0.35	250
Dieci DS 300.3 (SVC 4 ohm)	12″	4 Ω	34	0.51	2.01	0.39	300
Energy ES 300.5 (SVC 4 ohm)	12″	4 Ω	35	0.66	1.71	0.35	350
Energy ES 300D.5 (DVC 4+4 ohm)	12″	dual 4 Ω	40	0.75	1.58	0.35	350
Energy ES F30.5 (free-air/shallow, SVC 4 ohm)	12″	4 Ω	38	0.60	2.12	0.24	350
Hi-Energy HX 300 (SVC 4 ohm)	12″	4 Ω	33	0.47	1.75	0.55	600
Hi-Energy HX 300 D (DVC 4+4 ohm)	12″	dual 4 Ω	31	0.40	1.54	0.55	600
Mille Pro MP 300 D2.3 (DVC 2+2 ohm)	12″	dual 2 Ω	23	0.49	3.11	0.63	600
Mille Pro MP 300 D4.3 (DVC 4+4 ohm)	12″	dual 4 Ω	24	0.42	2.61	0.67	600
Mille Pro MPS 300 S2 (shallow, SVC 2 ohm)	12″	2 Ω	24	0.51	2.29	0.66	500
Mille Pro MPS 300 S4 (shallow, SVC 4 ohm)	12″	4 Ω	23	0.42	2.19	0.66	500
SPL Show SS 12 D2 (DVC 2+2 ohm)	12″	dual 2 Ω	36	0.64	0.87	0.61	1,000
SPL Show SX 300D (DVC 2+2 ohm)	12″	dual 2 Ω	46	0.48	0.71	0.55	800
Uno S 300 S4 (SVC 4 ohm)	12″	4 Ω	33	0.60	2.90	0.36	250
Dieci DS 38.3 (SVC 4 ohm)	15″	4 Ω	23	0.65	8.62	0.35	300
Energy ES 380.5 (SVC 4 ohm)	15″	4 Ω	32	0.89	3.49	0.35	450
Hi-Energy HX 380 (SVC 4 ohm)	15″	4 Ω	30	0.55	4.35	0.55	700
Hi-Energy HX 380 D (DVC 4+4 ohm)	15″	dual 4 Ω	27	0.40	4.61	0.55	700
SPL Show SS 15 D2 (DVC 2+2 ohm)	15″	dual 2 Ω	31	0.61	2.43	0.61	1,200
SPL Show SX 380D (DVC 2+2 ohm)	15″	dual 2 Ω	43	0.65	1.59	0.55	1,000

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