got different if you know how to listen and differentiate it....some people will not really notice it......but mostly do....

first need to know how a speaker work......speaker has a coil and magnet and when you pass electricity through it, the coil will vibrate and produce sound with the paper connected to the coil.....

if you connect correctly, the sound will be pushed out as the coil will vibrate and produce sound in the outward direction....

if you connected wrongly, the sound will be pushed in ......... so that's why can still hear the sound but it will be a little different.....