davidmolliere
Headphoneus Supremus
I made the math. ZX507's balanced power output is 200 mW. To achieve 90 dB volume, the connected headphone must have a sensitivty of 67 dB/mW and above. For 100 dB it must be 77 dB/mW mW of above. Since all headphones have a sensitivity of 77 dB/mW and above ZX507 should be able drive (almost) every full sized headphone. Correct ?
There is a big difference between driving a headphone loud enough and have enough headroom and current to drive them well enough. Sensitivity is one item, I don’t see any mention of impedance and it definitely matters... (https://www.rapidtables.com/calc/electric/power-calculator.html#dc)
Don’t mistake me here, I am a big fan of Sony house sound (owned the ZX2, ZX300, 1A, 1Z...) you can’t beat that analogue sounding signature but I can’t wait to have them release something that can handle a bit more output power... maybe that’s not compatible with S-Master digital amplification though. On the flipside, they have the best track record for battery life... can’t have it all.
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