integrated amp - jumper between preamp and amp

I have always replaced the jumpers, even on top of the line stereo receivers.  Anything that has pre-out/main-in jumpers. I thought it sounding better in every case, but YMMV.

I tried the Audioquest, they were fine, but I built my own using Canare L-4E6 cable and Rean/Neutrik RCAs.  Sounded better and much less money.

Waste of money! As the French Chef says "No diffawrance!"

I had a pair of speakers with only one jumper. I put a nail in as another jumper. Worked fine. Speakers were Audio Note E's. Special jumpers? I think not.