I have the 3.7i with the Sanders Magtech and an Aesthetix Calypso Signature and the highs are not shrill at all. I’m not running the resistors at all but am using Empirical Audio jumpers. I’m also using GiK Q7D diffusers and Monster Bass Traps with range limiters and scatter plates. My room is quite large (35’x15’x10’).
I did have shrillness in the upper registers when I was using the stock jumpers, Odyssey Kismet in Stratos, and no room treatments, but with each addition (first the Empirical Audio jumpers, then the GiK room treatments, and finally the Sanders Magtech), the shrillness decreased. The Odyssey monos especially strained at higher volumes (75db-90db).
I’m actually picking up a Spectron Musician III mk2 with all of the upgrades tomorrow and will be able to directly compare to the Magtech.
I did have shrillness in the upper registers when I was using the stock jumpers, Odyssey Kismet in Stratos, and no room treatments, but with each addition (first the Empirical Audio jumpers, then the GiK room treatments, and finally the Sanders Magtech), the shrillness decreased. The Odyssey monos especially strained at higher volumes (75db-90db).
I’m actually picking up a Spectron Musician III mk2 with all of the upgrades tomorrow and will be able to directly compare to the Magtech.