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i got a challenge for someone how do je get the punching sub bass like this:

http://www.youtube.com/watch?v=nN2Ci_3QmLQ

or

http://www.youtube.com/watch?v=VhNaQexYwX0


not the exact sound but the punch of it

i've been fighting alot with the punching sub bass but i can't get it just right so the question is how do i make a bass like this:::

http://www.youtube.com/watch?v=nN2Ci_3QmLQ

or

http://www.youtube.com/watch?v=VhNaQexYwX0


not the exact sound but the punch of it