According to the crew at MadShrimps, you might need to tweak the setting on the Razer Kraken Ultimate headset out of the box but, overall it's a decent headset.
Right after connecting the Kraken Ultimate to our testing PC and trying out some games and 4K TV Shows, we have found the headset lacking bass and overall it was not giving out very much audio detail. After adjusting the output details via Synapse software (Bass Boost, EQ settings, etc), the difference was very noticeable and it was like we were wearing a complete different headset in our hands.
