Same experience with banana clipped 3103 cables into big baffle Wharfedale Lintons. Immediate and noticeable increase in voltage to the speakers. I had to tweak a bit to recover the imaging and sound stage. There was some distortion in my signal chain that was not audible with Amazon wire but came through the bigger cables, I think. Just dialed back my analog preamp level and slightly upped amp attenuation …increased the toe-in a little…and captured some Mogami magic. Best DIY $90 I’ve spent lately!