The subwoofer amp will not change the 'live' character of the sound at all. What do you want?
More highs? ->Tweeter/crossover change.
More/'feel-able' bass? -> That does the subwoofer and its enclosure/tuning and the crossover setup. What bass are you using and what's the enclosure/volume/tuning? Sealed, BR, horn, BP, TML?
Well, you have either to change your crossover/dsp setup or you have to change your speakers, a silk dome tweeter isn't suitable for any DJ purposes and a 2" midrange which goes from 400Hz up is just for hifi like your tweeter. What other amps do you use for the tweeter, 10" and midrange?
That means it's not the amplifier, it's the crossover or it's setup. The crossover makes 90% of the sound of the speaker. Modifying the amp will not help you at all.
