I agree with Bob Reynolds regarding the sub.
However, I do not remember if you mentioned what speaker cable you were
using. I might think, i your cable manu, has a product that is alike in the highs and mids, but is thicker, you'll get more bass. 14 gauge, verses 10g. But, that is if they swear the other characteristics are the same.
*Maybe a less expensive solution. I'd go for the sub, generally having
a contour control to be just where you want it, including "hardly
perceivable" if that's how little addition you need.
However, I do not remember if you mentioned what speaker cable you were
using. I might think, i your cable manu, has a product that is alike in the highs and mids, but is thicker, you'll get more bass. 14 gauge, verses 10g. But, that is if they swear the other characteristics are the same.
*Maybe a less expensive solution. I'd go for the sub, generally having
a contour control to be just where you want it, including "hardly
perceivable" if that's how little addition you need.