Crossover Help

I'm using an Cambridge Audio Azur receiver with orb audio speakers, similar to gallo, and need some help. I find the bass is not so good as the speakers are tiny as one would expect. I've set the receiver to small for speaker size and my Hsu vtf 2 sub set to external crossover. I've actually tried both internal and external and neither are very good. My question is can I find a receiver, denon/pioneer elite/etc, that has a crossover frequency that I can set so ALL bass will be sent to the sub?

Thanks