Not only is the iPhone 7 capable of outputting louder sound, but it also features two speakers that are capable of producing true stereo output.
The two speakers — one in the bottom of the iPhone, and one in the earpiece — are a first for an iPhone. Although the iPhone 7 doesn’t feature the four-speaker ensemble found on the iPad Pro, it is capable of producing true stereo-separated sound that your ears can perceive while the phone is oriented in landscape mode.
