xnor
Headphoneus Supremus
- Joined
- May 28, 2009
- Posts
- 4,092
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- 227
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I'm working on it.
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Yes. 110 dB is the target. The sensitivity is converted from manufacturer specs (often with 1 mW input) or taken from measurements and converted to 1V input. Since the source is assumed to output twice that (2 V), we have to subtract 6 dB.
You can also attack this from another angle: 110 - (X + 20*log10(2 / voltage_required_to_reach_X_dB)).
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Right. If you use a DAP that outputs 1V you have to add 6 dB. If it outputs only 0.5 V add another 6 dB.
or add: 20*log10(2 / X) where X is the Vrms of your source.
Can you add the following headphones?
I'm working on it.
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If you don't mind me asking, how was the gain calculated? It seems to be 104 - S@1V.
Yes. 110 dB is the target. The sensitivity is converted from manufacturer specs (often with 1 mW input) or taken from measurements and converted to 1V input. Since the source is assumed to output twice that (2 V), we have to subtract 6 dB.
You can also attack this from another angle: 110 - (X + 20*log10(2 / voltage_required_to_reach_X_dB)).
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The gain calculation assumes a source output voltage of 2 Vrms. For lower voltage (portable) sources, obviously more gain is needed.
Right. If you use a DAP that outputs 1V you have to add 6 dB. If it outputs only 0.5 V add another 6 dB.
or add: 20*log10(2 / X) where X is the Vrms of your source.