When comparing beyerdynamic DT770 PRO vs AKG K391 NC, the Slant community recommends beyerdynamic DT770 PRO for most people. In the question“What are the best headphones?” beyerdynamic DT770 PRO is ranked 8th while AKG K391 NC is ranked 61st. The most important reason people chose beyerdynamic DT770 PRO is:
These Beyerdynamics offer impressive sound isolation, keeping exterior noise out and your music in.
Specs
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Pros
Pro Impressive isolation and minimal sound leakage
These Beyerdynamics offer impressive sound isolation, keeping exterior noise out and your music in.
Pro Sits well over your ears
The DT770s are very comfortable to wear with deep and spacious ear pads. The velour material used on these are smooth and breathable, and the thick foam provides ample cushioning. These headphones can be worn for long periods of time with ease.
Pro Good soundstage for closed back headphones
The DT770 Pro, when amped properly, creates an open feeling sound stage that is very impressive for a headphone with a closed design.
Pro Great sound quality with deep and powerful bass
The bass is not overpowering. Instead, it is clean and controlled. The overall sound signature is focused on the bass but the mids and highs are in no way lacking either.
Pro Good accessory bundle
The accessories included are all very useful. You get two 3.5mm headphone cables, a USB charging cable, silicone ear tips, a travel pouch and an airplane adapter.
Pro The headphone cable can be detached from the control module
You can easily replace the 3.5mm cable should it get damaged. You can detach the 3.5mm cable from the control module which is very convenient. Other noise cancelling modules have fixed cables, so you’ll have to replace the headphones should the cable get damaged.
Pro Integrated microphone
You can take calls with these headphones on. A microphone is integrated into the remote which makes answering calls fast and convenient.
Pro Decent active noise cancelling
A good amount of noise will be blocked from mixing in with your music. Loud, low-pitched sounds may still be clearly heard though
Pro Compact noise cancelling module
You aren’t likely to have issues using these on the go. Most active noise cancelling in-ear headphones have large control modules, while the K391NC has a fairly compact and light module. You can easily use these headphones while walking and comfortably enjoy active noise cancelling with your music.
Pro Fairly detailed and rich sound
The highs are quite detailed, yet do not get harsh. The mids are slightly forward, so vocals and instruments can easily be heard. The bass is not very powerful but is tight, so you’ll get decent punch from your music.
Cons
Con May require extra power/amplification for optimal sound
Depending on which model is purchased (16/80/250-ohm), your system may have trouble powering them to get a full sound and comfortable volume. 16/80-ohm should work fine in most systems. If not, you may need an external amplifier.
Con Limited inline controls
The inline remote only allows you to play, pause, and skip tracks. You can’t control volume levels though.