Okay, I just got through a bunch of rock tracks from dozens of bands. With the Monolith M1570, the RebelAmp spanks the Schiit Jotunheim 2.
As for slam for rock/metal, I specifically listened for this on each track. My verdict is that the RebelAmp continues to spank the Schiit Jotunheim 2 in regards to slam with the Monolith M1570.
So, I grabbed my Grado Hemp as these are some great rock headphones. Still yet the RebelAmp continues to spank the Schiit Jotunheim 2.
Okay, so I grab the Audeze LCD-X (2020) and even though the RebelAmp still had more slam, the Jotunheim 2 slam was getting closer to that of the RebelAmp.
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Overall, I really had a tough time listening with the Schiit Jotunheim 2 as I always wanted to plug the headphones right back into the RebelAmp because it just sounded so good being more refined, and fuller, and yes more slam.