Anyone have any advice on getting a good sub bass and what sort of frequency a sub bass should occupy? Is it common practice to use one? I'm making psy, so not sure if I should be using one or not.

I've tried using sin waves as someone suggested but I've found if they go too low then you cant really hear them.. atleast on my shitty monitors. The cones are moving, but no sound is coming out... lol.. Is that the general idea of it, so it cant be heard but can be felt?

Also if in 'theory' it's good practice to chop bass frequencies below 80Hz then whats the point of having a sub bass if your just going to cut it out anyway?

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i just came across this
Making your bassline thump
maybe that helps

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Phunktronix Mixes

sine
change the adsr envelope to 0 attack for added punch then compress it.
Run a LPF over it if you feel the need

If you cant hear it on your small monitors then thats good.
Its too low for your speakers to reproduce- get a copy of the prodigy- 'charly' (trip into drum n bass mix- (its on the experience album)) and skip to the break in it with just the subs on their own and see if you can hear that on your speakers. Its a good reference point as to what your speakers can handle

Stick it on a big system and believe me you will hear and feel it.
The best filling rattling bass is felt more than its heard

It sounds like you need decent monitors, or a dedicated sub (OR BOTH!). Bass should be felt, not heard. I'm talking about frequencies under 40hz. If your monitors can't reproduce them you're in trouble.

How to go about getting good bass? Take a reference from a track you like the kick/bassline bass of, and try and get the kick/bassline bass you're creating in the same key. Sometimes I even put a highpass filter on a reference track so I can hear what's going on in it's lowend without being distracted too much from the highend frequencies.

Take this one track for example. If I turn this up really loud, I can feel my chair and floor vibrating under me from the bassline. It's non-audible vibration, and feeling the power behind it really wakes you up and says: this track has power.

AlphaDelta Bass

Now the bassline is made up of a low octave sine wave for the lowend of the bassline, and a filterd sawtooth for the actual audiable part of the bassline. It's the sine wave that really shakes everything around you. Then again, if you'r monitors can't reproduce these frequencies, then you'll have no idea what I'm talking about