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Massdrop x AKG K7XX Audiophile Headphones

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Massdrop x AKG K7XX Audiophile Headphones

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Roboto2follow
1y
I just got mine and they require A LOT of power. My Little Dot MKIII (OTL amp) does not have enough power to drive these. I believe the issue is with the sensitivity of this set. Dip switch changes do not make a difference and the dial has to be cranked to 9 in order to get high volume. The cans don't even distort at full volume with the MKIII.

However, when paired with a SMSL SD 793II these cans sound great. Crystal clear, bright, and crisp with wide soundstage. They sound really good (but low volume) straight out of an iPhone 7 as well.

tldr;
k7xx + OTL amp = sad face
k7xx + SS amp = big smiley happy face

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SamTwentyTre39follow
1y
Roboto
My LittleDot 1+ drives my K712 Pros with ease? The K712 Pro and K7XX have the same impedance.
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SamTwentyTre39follow
1y
Roboto
My LG V20 powers my K712 Pros!
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EniGmA1987404follow
1y
Roboto
typically OTL amps have a high output impedance and are not designed to work well with headphones under 250ohm. These headphones are 62 ohm, so they tend to work best with solid state amps.

These headphones have a 105db/V sensitivity, which is pretty good overall. Not the highest, but definitely good enough to be driven from a lot of stuff out there.
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Roboto2follow
1y
SamTwentyTre
that's because the LG V20 has a dedicated headphone amp with a high 2Vrms output.
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SamTwentyTre39follow
1y
Roboto
That's true. It has a very powerful amp. I mean it can power HD 800s.
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