Solo Ultra Linear after a week

I've had my Solo Ultra Linear (Diamond edition) for just over a week now. It replaces a Musical Fidelity X-Can v3 and X-PSU v3 that had some modification and a valve change to get a sound improvement, however when I went to have a listen to some Sennheiser HD700 headphones I took my original HD600 and MF amp for comparison. I also had a listen to the Solo Ultra Linear through the HD600 and HD700. I came away from the audition with a new headphone amp and HD700 headphones.

Compared to the MF X-Can v3 using the HD600 the Solo Ultra Linear doesn't have the background noise of the valve MF amp. The upper and mid frequencies are nice, clean and crisp giving more detail than the MF amp and opening up the sound so backing singers and instruments are more noticeable or just noticeable as the MF amp didn't make their presence known. There is also an improvement in the lower frequencies with slightly more bass extension and tightness giving bass notes more definition.

From what I've read on the forum the Solo Ultra Linear still has some 'running in' to do, I'm looking forward to the improvements. In my opinion the Solo Ultra Linear compared to the MF X-Can v3 is a very worthwhile improvement. It all gets even better with the HD700 headphones.

For completeness I use my Solo Ultra Linear connected to the record loop of a MF X-150 amp with a Sonos ZP90 streamer and Rega DAC as source.