With three versions of the same model, each with their own impedance rating, it can quickly become confusing as to which suits your purpose. With a rating of 32 Ohms, this version of the Beyerdynamic DT770 Pro Headphones offers the lowest impedance, and is thus the best option for monitoring audio from a single source. With its capability of efficiency generating sound from low level input signals, this is the perfect pair of headphones for battery-powered devices. Like all other versions of this model, they are also incredibly comfortable to wear, even for extended periods of use.
With the lowest impedance rating of the three versions of Beyerdynamic DT770 Pro Headphones, this model has the thickest wire, and therefore lets the most signal through. Although this can have a slightly adverse effect on the diaphragm, as it cannot move with as much accuracy as those with higher impedance, it offers a pair of headphones that are louder, whilst requiring less power.
With their low-power, high-volume operation, these are excellent for battery-powered mobile devices, where the slight drop of quality is more than offset by what you gain.
The question of whether to buy closed or open back headphones is dependent on the application they are needed for. Closed back headphones don't spill audio, keeping most or all output within the ear cups. This makes them an excellent choice for recording, were escaped sound could be captured by a sensitive microphone and ruin your recording. However, this design often has a reduced amount of bass response, which would make them an inferior option when mixing.
Open back headphones are more suited to mixing, as their open design allows sound to pass through them easily, giving a more natural sound and a clearer bass response, they are also noted for being comfortable. The thing that makes them good for mixing also makes them less useful for recording. As sound is allowed to pass through the headphones, this sound can be picked up by a microphone.
This is where the Beyerdynamic DT770 Pro Headphones (32 Ohms) steps in. They are closed back in their design but they also make excellent headphones for mixing (especially on the go). This is because they have been crafted with Bass reflex technology, and have larger ear cups and velour pads, which improves the bass response that can be lacking in other hard back designs. With a nominal frequency response of 5Hz-35kHz and the benefits of the hard back design, the Beyerdynamic DT770 Pro is a true hybrid.