Aux in outut volume too low in a car

[nvrphanikumar]

Hi,

I recently bought an cable that could connect to the car speakers through aux in.
I could play songs from my mogul on car speakers but the problem I have is ,very less sound output.
for example:with an volume level of 25 out of 50 would give me good sound when I play a cd but when I try to play any songs from my mogul with same sound level,I could barely hear it.I have to set the volume level to 43 out of 50 to make it audible similar to 25 for cd's.

Is this normal.Does some one know a fix on this.
Please suggest.

Thanks