I have four pairs of headphones tested - Sony Philips August and AEG. The other brands were two to three times as expensive. Sony had the best and most sound - but it was much too quiet and had no additional jack and Verbindungspobleme with Bluetooth. Philips also had a very good sound - but only if you could use an additional equalizer - otherwise lacked the bass and the treble and it was no longer good. August was especially good on the volume and the bass - but had a bad cheap strange sound. Although these headphones AEG can not really keep up with the more expensive Sony and Philips of the sound quality - but still sound quite good. In addition, the volume is more than adequate - better than the two mentioned - where it was not enough. The comfort is also good for the price. Because of the volume and the very good sound, I have decided for these headphones. They are highly recommended for this price.