Apple says it has increased the loudness of the speakers on its new iPhone XS and iPhone XS Max. In the video below we use a sound meter to compare the speaker volume of the new iPhones to last year's iPhone X. We took the reading by placing the sound level meter directly under the Lightning port and by placing the meter midway along the side of the device. Getting an accurate sound level on the iPhone is a little tricky as one speaker is positioned at the bottom of the device and the other is in the earpiece
iPhone XS specs vs. XS Max, XR, X: What's new and different - CNET
See how Apple's new 2018 iPhones compare spec-by-spec with last year's iPhone X.