SPL Chart

	A	B	C	D	E	F	G	H
1	Use the chart below to calculate amplifier power required (mW) to reach a desired listening volume (dB) with your headphones. Be sure to observe amplifier output power at your headphone's published impedance specification (ohms)!
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5	Your Headphone Sensitivity (db/mW)	90 dB	95 dB	100 dB	105 dB	110 dB	112.5 dB	115 dB
6	82	6.310	19.953	63.096	199.526	630.957	1122.019	1995.262
7	83	5.012	15.849	50.119	158.489	501.187	891.251	1584.893
8	84	3.981	12.589	39.811	125.893	398.107	707.946	1258.925
9	85	3.162	10.000	31.623	100.000	316.228	562.341	1000.000
10	86	2.512	7.943	25.119	79.433	251.189	446.684	794.328
11	87	1.995	6.310	19.953	63.096	199.526	354.813	630.957
12	88	1.585	5.012	15.849	50.119	158.489	281.838	501.187
13	89	1.259	3.981	12.589	39.811	125.893	223.872	398.107
14	90	1.000	3.162	10.000	31.623	100.000	177.828	316.228
15	91	0.794	2.512	7.943	25.119	79.433	141.254	251.189
16	92	0.631	1.995	6.310	19.953	63.096	112.202	199.526
17	93	0.501	1.585	5.012	15.849	50.119	89.125	158.489
18	94	0.398	1.259	3.981	12.589	39.811	70.795	125.893
19	95	0.316	1.000	3.162	10.000	31.623	56.234	100.000
20	96	0.251	0.794	2.512	7.943	25.119	44.668	79.433
21	97	0.200	0.631	1.995	6.310	19.953	35.481	63.096
22	98	0.159	0.501	1.585	5.012	15.849	28.184	50.119
23	99	0.126	0.398	1.259	3.981	12.589	22.387	39.811
24	100	0.100	0.316	1.000	3.162	10.000	17.783	31.623
25	101	0.079	0.251	0.794	2.512	7.943	14.125	25.119
26	102	0.063	0.200	0.631	1.995	6.310	11.220	19.953
27	103	0.050	0.159	0.501	1.585	5.012	8.913	15.849
28	104	0.040	0.126	0.398	1.259	3.981	7.080	12.589
29	105	0.032	0.100	0.316	1.000	3.162	5.623	10.000
30	106	0.025	0.079	0.251	0.794	2.512	4.467	7.943
31	107	0.020	0.063	0.200	0.631	1.995	3.548	6.310
32	108	0.016	0.050	0.159	0.501	1.585	2.818	5.012
33	109	0.013	0.040	0.126	0.398	1.259	2.239	3.981
34	110	0.010	0.032	0.100	0.316	1.000	1.778	3.162
35	111	0.008	0.025	0.079	0.251	0.794	1.413	2.512
36	112	0.006	0.020	0.063	0.200	0.631	1.122	1.995
37	113	0.005	0.016	0.050	0.159	0.501	0.891	1.585
38	114	0.004	0.013	0.040	0.126	0.398	0.708	1.259
39	115	0.003	0.010	0.032	0.100	0.316	0.562	1.000
40	116	0.003	0.008	0.025	0.079	0.251	0.447	0.794
41	117	0.002	0.006	0.020	0.063	0.200	0.355	0.631
42	118	0.002	0.005	0.016	0.050	0.159	0.282	0.501
43	119	0.0013	0.004	0.0126	0.0398	0.1259	0.2239	0.3981
44	120	0.001	0.0032	0.01	0.0316	0.1	0.1778	0.3162
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