Help Galaxy S4 headphone amplifier / Low volume / Bad quality


is there something wrong with my device or is samdung quality this bad at the headphone amplifier?
I use fm-transmitter to listen music at my work and in a car. But I have to add so much volume at the receiver that the buzz noises comes too loud.

Fm-transmitter is the same which I used with my Lumia 920 and I tried exact same songs. In Lumia 920 I don't have to put volume so loud at the receiver, not even near.
The sound is more rich and have more bass than galaxy s4. With SGS4 it sounds like I'm listening some cassette from early 80's or even worse.

What can I do?
Maybe I need to change back to Lumia 920 or wait 1020.