gyrodec
100+ Head-Fier
- Joined
- Nov 26, 2007
- Posts
- 155
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- 13
It is often said that the HD600/650 really need a home amp with lots of voltage to get the best from them, and balanced is even better. Now, I was reading the HD600 specs and the sensitivity was stated two different ways: 96dB @ 1mW and 112 dB @ 1V rms (which would be only 3.333mA for the 300 ohm HD600s).
From these specs, it looks like a swing of +/- 2V would get you clean 112dB peaks, which seems more than loud enough. The 96dB, which seems like a good loud working volume for the non-peak parts, is only 0.54V.
So, it seems only a few volts +/- would be more than enough. I also measured the voltage across my HD600s at normal listening volume and it was arounf 150mV. So are the specs not really accurate, Did I screw up my ohms law calcs, or do HD600's only need a couple of volts to get really load?
From these specs, it looks like a swing of +/- 2V would get you clean 112dB peaks, which seems more than loud enough. The 96dB, which seems like a good loud working volume for the non-peak parts, is only 0.54V.
So, it seems only a few volts +/- would be more than enough. I also measured the voltage across my HD600s at normal listening volume and it was arounf 150mV. So are the specs not really accurate, Did I screw up my ohms law calcs, or do HD600's only need a couple of volts to get really load?