Reply to Dubstep help?

Hey DJTT so ive made this cool little tune and i cant figure out the right bass sound for the drop...ive got everything good all the way to the drop and then boom i got nothing heavy to put there...it becomes either too heavy or not enough...im looking for a sound kind of like this...
at the 150 mark...that kind of bass, if anyone can help that would be great.

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