Sound-Check Sony Xperia Z2 vs. HTC One M8 vs. Alcatel OT Idol Alpha

How is the sound of the stereo front speakers of the new Sony Xperia Z2? Listen for yourself in this sound-check that compares the Z2 to the new HTC One (M8). In addition: the Alcatel One Touch Idol Alpha, just to hear a phone with a regular mono speaker for comparison.