Spotify with poor sound quality in the Oneplus 5

[luvialca]

I bought recently a Oneplus 5 and I noticed that Spotify have a poor sound quality in this device, although the quality is configured in the maximum. The music has no bass and the sound seems muffled.

When I play the same music on Musicmatch (connected to a Spotify account), the quality is much better.

I used a Nexus 6P before and I didn't notice this problem. Besides that, I notice that in the Oneplus 5 doesn't exist the equalization function.

Is anybody having the same problem?