The Smålanders went on the knock immediately and led 2-0 already after a quarter when Jonathan Ring and Nils Fröling found the net.
Things were going to get worse for the visitors. Johan Hammar came in to finish the match.
The Ring brothers then made sure to close the event at Bravida arena.
Just before the half-time whistle, Jonathan Ring doubled his goal harvest - and in the second half, little brother Sebastian increased to 4-0.
Häcken's Patrik Wålemark looked great with his 1-4 goal in the 68th minute, but it was not enough to come back.
The victory means that Kalmar passes IFK Norrköping in the limping table and goes up to sixth place, six points from Europaplats with four rounds left to play.
CLIP: Kalmar beat Blåvitt (September 27)
Javascript is disabled
Javascript must be turned on to play video
Read more about browser support
The browser is not supported
SVT does not support playback in your browser.
We therefore recommend that you switch to another browser.
Read more about browser support
IFK Gothenburg fell against Kalmar FF.
Photo: Bildbyrån