I was listening to a song on my newly installed Hardy Heron Kde4 remix , I wanted to increase the volume but I was not able to find the Volume Control icon in my Kde 4 panel . So i have found a solution to this problem 😀 .
The solution to this problem is quite easy , go to Konsole and write Kmix and then press Enter .
On pressing Enter the icon (speaker) will appear in the panel (second from right in the picture below)
Now you can control volume of your system by right clicking on the icon in the panel . If volume is still low , you can go to the icon in the panel , right click on the icon and then choose “mixer” option below and increase the “front volume” to full , to get the maximum sound output. 🙂