Long answer RCA voltage levels are 2 v peak to peak . Speaker outputs are amplified and can go as high as 40 to 50 V ! <| sep |> To be honest I ' m actually hoping for it to delay a bit so I have more time to do stuff IRL <| sep |> Each iteration of the # had something new to bring to the table that the S version didn ' t . They launched the 3 G which had 3 G support and then the 3 GS which was just a speed bump . The 4 had the new form factor and the retina display while the 4 S settled for the same exterior with upgraded hardware and Siri . The iPhone 5 had the new bigger size and aspect ratio while the 5 S was basically the same but with Touch ID . The 6 once again changed the design form and the 6 S is once again basically the same as its # predecessor but with better hardware . The 7 is similar to the 6 and the 6 S but it did have a new home button and one less headphone jack than the previous iterations . So far the # is indeed usually reserved for major external overhauls . The 3 G was completely different from the 4 but the same as the 3 GS . The 4 was different than the 5 but the same as the 4 S , etc . Granted , the 6 S is pretty similar to the 7 but that was never the case before . If the next iPhone is expected to be such an overhaul of the phone ' s design , then I think they should skip the S and go straight to 8 .