I have two vintage integrated amps and I want to run my step up transformer into both via a switcher. I am wondering if a PCB based switcher like the Schiit SYS will either lower the volume or degrade the sound compared to a point-to-point switcher. I tried this with a really cheap radioshack...

I'm using this RCA switcher by Sescom: https://www.amazon.com/Sescom-SES-AUDIO-AB-Stereo-Audio-Switch/dp/B008BMLXAU. I switch between DarkVoice 336SE and Schiit Jotunheim. I've decided to use two amps because Rock, Rap and Vocal songs tend to sound better on DarkVoice while EDM tend to sound...