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This headphone REQUIRES a full blown high power true LOUDSPEAKER amplifier to drive it !! (not a headphone amp). They need a minimum of 100Wpc? And it looks as if it needs a very serious high current amp to drive the load below 1 ohm? (like a friggin Krell).. Don't take my word for it.These power needs for this set of Cans is exactly what the company told Stereophile - who has just reviewed them this month. Perhaps the only headphone in the world currently that requires a massive loudspeaker amp? This is something I feel that both Drop and this company need to tell the perspective customers to avoid a nasty surprise - a.k.a. - "What do you mean that my headphone amp is not capable of driving these headphones? I now need to buy what! kind of amp? And how much power is required to drive them?"
High power is a bit of a stretch. The average person listens at about 75dB, which would require a whopping 0.025 watts. Such a person would have 26dB of headroom before they reached the maximum output of a 10W RMS (into 6 Ohms) amplifier, and possibly a bit more if the amp can output peak power levels exceeding its RMS rating. Move on to an amp that can push 50W RMS into 6 ohms, and you can get a maximum sustained volume of 107.99 dB. Absurd amounts of power for headphones, yes, but these are more speakers that you wear on your head than they are headphones. Lastly, to address your last remark, the kind of person who is willing to drop $3000 on a piece of sound equipment like this without even doing the minimal reading required to see that it requires quite a bit more than a standard headphone amp is either wealthy enough that having to get a dedicated amp for this is not at all an issue, or so reckless with their money that it is surprising that they could afford to drop three grand on these in the first place.
Bro if you're dropping $3500 on headphones I think you'll be able to figure these kinds of things out lol.
75dB is rather low level... And please note that you (and I) are refering to average volume level on a song, which should be around 10db lower on non compressed tracks (around 5db on popular music, 15db on instrumental recordings); so even for your 75db you would need to achieve 85-90db. And besides at max output you often can here some cliping or distortion (like MAX = 1 or 3% distortion) so basically you would have to add 3-6db just in case.
Empirically taking HD6xx as an sample, which has 90db at around 0.25Vrms, I would say that (for me)
0.25 is good for long term/quite listening, just for listening (1 hour) is like 0.5V and for those special moments 1V, and actually now I listen to acoustic/vocal track at 2V, which is too much for me but I think some people would like to achieve that level (my guess 90db + 3*6db - 13db = 95db) especially if this is low-distortion and non-hot equipment.
That basically means 1W*(2^3)^2=64W if I not mistaken. And as for engineer it is better to make the specs x2 just in case :) ~100W
ehider you are not paying attention. The amp does not see the headphone input impedance (which is way below 1 Ω, like 0.017Ω) it sees the 6Ω input impedance of the interface box—that's why that box is needed. All this is moot when the Schiit amp is in the picture.