The Apollo has been burning in pretty much 24 hours a day for the last 8 days.
Accounting for the few down times, I would say that it has had at least 180 hours of play time while always being hooked up to a powered on amp.
Day 1 and 2:
I wasn’t overly impressed with the Apollo either on day one or two. After about 10 hours of burn-in during my first serious listening session, I felt the Apollo wasn’t balanced. The low and high end were out of control and too overpowering. On the second evening the Apollo showed negligible improvement, but nothing to write home about. I still wasn’t really pleased, but thought the Apollo had seemingly good dynamics, PRaT, and weight especially noticeable with bass and drums.
Day 3 and 4:
I noticed a nice coherent improvement in sound quality on the 4th night. The soundstage grew. There was better layering and separation of instruments and voices. The top and bottom end had more control and as a result the mids were easier to hear. The very lower level details that I know are on some of my reference tracks were still difficult to make out, though, I could hear them just not as well as I remembered I had heard them with the E5.
Day 4 and 5:
The Apollo only had minor improvements, yet noteworthy were with respect to content retrieval starting to rival the E5.
Day 6 and 7:
Things really started to come together and sound beautifully organic as a cohesive whole based on the positive things previously mentioned. I never really believed in burn-in, but I can say that I’ve noticed changes over the past few days for the better with this particular digital source. I haven’t compared the Apollo to the E5 yet since the Apollo hasn’t settled in sonically, but based on my reference tracks that I am very familiar with I believe that I can safely say the Apollo provides more weight to each note. Additionally, the Apollo seems just more musical resulting in a better articulation of the melody while at the same time not missing the details. I am happy to report that the Apollo does definitely rock, but certain electric guitar riffs that I am accustom to seem a tad less crunchy and/or harsh. At this point, I am impressed with the Apollo. And think Mikey’s assessment in the previous post pretty much nails it on the head. I’ll try and provide another update in a week.