Hifi59-I'm glad you are enjoying the new Milo and you should continue to be surprised and thrilled over the remaining 160 hours as the Milo marches towards ultimate burn in. It will get deeper, clearer and smoother until the final real magic at 200 hours. What you describe as a possible slight rolled treble is actually the lack of distortion you and many other have come to consider detailed transients. Real life has no sizzle or sibilance why should recordings. You are actually hearing natural detail. If you listen very closely everything is there and nothing is missing but harshness, sizzle, edginess, peakiness and graininess. It is distortion that causes listener fatigue when the brain can no longer compensate and protect you against the distortion. The tube like sound signature is actually more a case of low noise and distortions along with parts chosen for their naturalness and musicality. Most solid state designs use a lot of industrial grade parts that usually impart a dry and grainy signature without sweetness and richness. I thank you for sharing your impressions with the public and I am very happy you are enjoying the Milo.
Jeff Wells