Most of the improvements and benefits I've experienced has been with what Tmsorosk said. Single wire with good quality jumpers. The jumpers I've used have ranged from Blue Jeans 10 White speaker wire to Black Cat Morpheus jumpers.
To Tbromgard. Are the bi-wire cables you used with the Usher's a thinner gauge than the non bi-wire cables you used? Maybe the thinner sized wire on the lows is the problem?
From checking the archives previously there have been some members who have used thicker gauge speaker wire on the bass and thinner wire on the highs. I've also read people using different kind of cables entirely. E.g. Thicker OCC copper cables for the lows and Silver type speaker wire for the highs.
Good luck with the trouble shooting.
To Tbromgard. Are the bi-wire cables you used with the Usher's a thinner gauge than the non bi-wire cables you used? Maybe the thinner sized wire on the lows is the problem?
From checking the archives previously there have been some members who have used thicker gauge speaker wire on the bass and thinner wire on the highs. I've also read people using different kind of cables entirely. E.g. Thicker OCC copper cables for the lows and Silver type speaker wire for the highs.
Good luck with the trouble shooting.