IMHO I think that this is not totally goofy. What you are hearing could be an improvement in sonics. The parallel/shot-gun biwiring does present a different impedance of the speaker to the power amp compared to a single run speaker cable & that alone can be better off for the amplifier. Often manuf will encourage biwiring for their particular speaker models.
What you should do is listening long-term to your music that you are very familiar with. You know what it used to sound like & now you are hearing a new sound. Is the new sound still better few days down the road? 1 week later? 1 month later?
What you should do is listening long-term to your music that you are very familiar with. You know what it used to sound like & now you are hearing a new sound. Is the new sound still better few days down the road? 1 week later? 1 month later?