Speaker cables would hardly give you an added amount of bass. It may make it more clearly defined, which in turn might lead to either a tighter perceived sound in the lower end. However, it's not going to magically give you that extra extension you want. All depends on a variety of factors, not the least of which includes the room your system is in (which I suspect might be it).
BTW, I run a pair of AP Tempo IIIs and they can be a bit shy on the lower end. That's because my room is fairly large and it's on a suspension floor.
BTW, I run a pair of AP Tempo IIIs and they can be a bit shy on the lower end. That's because my room is fairly large and it's on a suspension floor.