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Mine just came in. Plugged them in to my Dragonfly red and iPhone 7 Plus. The volume seems very low even maxed out. I read a lot of comments saying the Dragonfly red was substantial to drive these headphones. Is this not the case?
I Feel You Bro.. They Dont Seem To Loud Like Wtf
You need an AMP or another device that produces more power. Most Headphones go up to around 30 OHMS max. These are 300 OHMS. These are Audiophile grade cans that need the power to produce mind blowing sound. What did you expect if you didn't read up on them first?
you need an amp to drive these headphones
I know people say, "get an amp" but what they mean is a wall powered amp. Keep in mind, usb power is only so limited (I believe 5 volts if I remember correctly) so yeah... usb powered amps can only get you so loud. However, with a wall powered amp (budget ones around $100), amps like the JDS Atom, Monolith Liquid Spark, etc will be able to provide much more power.
But it also depends on your hearing sensitivity. I originally started out with a uDac 3, which is usb powered. And truth is, those got "loud nuff" but that's it. It really became a problem with older songs such as Imaginary Place by Busdriver, where the mastering is on the quieter side. I can easily say that the uDac on max volume was not loud enough to play those at a good volume. More modern stuff, you might be able to get away with, but again, it really depends on your listening level preferences and how sensitive you're hearing is.
I said that I read that the Dragonfly red was adequate to drive them.
The reviews you read must have been from people plugging that little stick drive AMP into a more powerful machine that happened to have USB ports. Like dwang040 above just mentioned, your USB ports only get a certain amount of power from your device and that is very unlikely to be enough to power 300 ohms resistance. Invest in a nice wall plug in AMP and DAC as well to balance out the sound. It's well worth the investment. I'm sure there are some pocket battery/AMP setups that could work for mobile listening, but that's also why Massdrop had the HD58X made, cutting the resistance in half so that you can listen comfortably in a mobile setting. Audiophile grade cans are mostly meant for a sit down session at home with a dedicated box AMP/DAC. They just need too much power when you go to the big leagues like these 6XX.