Here is a quick tip: Add several short delays to your sound to fake a mic'ed guitar cabinet sound. The delays must be very tight to emulate small room and speaker reflections (1-110ms). Try two short delays (nearby objects), and one long (back wall). Also you could look at impulse responses, and guess the time and amplitude (amount) and set your delays time and amplitude to each spike to fake a sound. Also don't forget that filters are basically EQ control and can be adjusted to fake different sound responses. Tuned feedback and Resonance can fake the natural resonance of a speaker, room or mic. The more you listen the better and fatter your results will be. These techniques will make your bass patch less boring. You will also use less CPU power.