DT-770 Pro 32 Ohm : Excellent

I have tested the 32, 80 and 250 Ohm versions of these headphones and decided on the 32 Ohm version because I am using them with amplified and non-amplified sources. With an amplifier, the sound quality of the three models is excellent and similar. However, both the 80 and 250 Ohm versions sound quiet and muddy (as expected) with low-impedance sources such as smartphones and tablets. But the 32 Ohm version delivers an excellent sound with low-impedance sources (but it does sound better when connected to an amplifier).

The headphones are very comfortable and can be used for a long time. They completely enclose the ears and provide a good degree of isolation from the outside noise. Since they are closed headphones they do not leak a significant amount of sound even when played at a high volume.

The phones are a bit bulky but they are very sturdy and the build quality is excellent (and they are "made in Germany"). It also seems most parts are replaceable.

The only big complaint I have about this version is that it does not come with the soft "velour" ear pads found on the 80 and 250 Ohm versions, which are much more comfortable than the pads of the 32 Ohm. Moreover, the 32 Ohm is 15-20 EUR more expensive than the other two versions. Yes, the pads are replaceable but they cost an extra 20 EUR. This makes the 32 Ohm version almost 40 EUR more expensive than its brothers. Strongly recommended.