Well on the jamstudio instruments, you can use a myriad of tricks.
1. Under the drum section, look up the "dirty bass" drum. It has a great reverb and a sub bass feel to it.
2. Under synth, look up "Forest" and "Atmosphere"...if you use both in the right combination with the "dirty bass" drum instrument, you can get a REALISTIC sub bass woofer sound!
Hope this helps!
