How can I get this bass sound

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1

Hi guys,

How can get this Daniel Portman bass sound. It start at 46s and it become louder at 1m15s.

I want to do this with Sylenth1.

I’m not to far but my sound is not tight as the one in the beat 

http://www.youtube.com/watch?v=MXfKu1JHqh4

Thx for your help

Eric