My speakers are DIY using Eton metal dome mids and tweeters. Surprisingly, the top end, while quite extended, never draws attention to itself and can be very delicate when the source materials allows it. The mids, however, are another matter. The are always highly detailed but can get aggressive with the wrong components/accessories/recordings. So, when I refer to sibilance and brightness, it is within the upper midrange.
I found the R1 to do a decent job of taming glare in the upper midrange. The GX emphasized it. I wouldn't say the R1 has much bloom but it does have image and tonal density making the Porter Port sound a bit thin. The Maestro may have only slightly less density but is so much more transparent that I could never live with the R1.
I've been buying wire for awhile, swapping out various plugs, trying to get the most detail while minimizing that upper midrange glare, and think I've found about the best solution. The "Mundorf Germany ISWG110 Silver/Gold 1mm wire", listed on Ebay from Taiwan, with an IeGO 8095 male plug as well as an Oyaide 046 female plug makes a highly detailed power cord that is extended on top, slightly warm, has decays that go on and on, and just nails the ambiance of the recording venue. I made power cords using 3 runs and 4 runs per pole and twisted them around each other (rather than trying to braid them) and then ran a simple thin wire counter-clockwise for the ground. I put the one with 4 runs per pole on my PS Audio P600 (with Maestro outlets) and used the 3 runs per pole on either my amp or my cdp and used a Wolff BOHICA on the other component. The sound was smoother than I've ever heard my system while the detail was about as good as it's ever been. Win/win right? Not quite, unfortunately. With two of these cords in the system, the specificity of images was compromised a bit. I'm not saying the images were indistinct. They just weren't as vivid as I like. So, I keep the 4 runs per pole cord on the PS Audio P600 and I have zero issues with sibilance. The soundstage is vast and just engulfs you and I'm always pleased with the level of inner detail that makes the music alive and captivating. Of course, I'm ever the audiophile so I'll surely try something else sooner or later but really, the power cord I've described has satisfied me like no other, at least with regards to the speakers I own. If I were more a business-man, I'd build and sell these. They kill most cords I've tried and I've had numerous power cords over the years. I hope this is of use to you. Thanks for looking.
I found the R1 to do a decent job of taming glare in the upper midrange. The GX emphasized it. I wouldn't say the R1 has much bloom but it does have image and tonal density making the Porter Port sound a bit thin. The Maestro may have only slightly less density but is so much more transparent that I could never live with the R1.
I've been buying wire for awhile, swapping out various plugs, trying to get the most detail while minimizing that upper midrange glare, and think I've found about the best solution. The "Mundorf Germany ISWG110 Silver/Gold 1mm wire", listed on Ebay from Taiwan, with an IeGO 8095 male plug as well as an Oyaide 046 female plug makes a highly detailed power cord that is extended on top, slightly warm, has decays that go on and on, and just nails the ambiance of the recording venue. I made power cords using 3 runs and 4 runs per pole and twisted them around each other (rather than trying to braid them) and then ran a simple thin wire counter-clockwise for the ground. I put the one with 4 runs per pole on my PS Audio P600 (with Maestro outlets) and used the 3 runs per pole on either my amp or my cdp and used a Wolff BOHICA on the other component. The sound was smoother than I've ever heard my system while the detail was about as good as it's ever been. Win/win right? Not quite, unfortunately. With two of these cords in the system, the specificity of images was compromised a bit. I'm not saying the images were indistinct. They just weren't as vivid as I like. So, I keep the 4 runs per pole cord on the PS Audio P600 and I have zero issues with sibilance. The soundstage is vast and just engulfs you and I'm always pleased with the level of inner detail that makes the music alive and captivating. Of course, I'm ever the audiophile so I'll surely try something else sooner or later but really, the power cord I've described has satisfied me like no other, at least with regards to the speakers I own. If I were more a business-man, I'd build and sell these. They kill most cords I've tried and I've had numerous power cords over the years. I hope this is of use to you. Thanks for looking.