Originally Posted by seaice
As far as the bass is concerned: I would say that there were some changes in the bass region during the initial burn-in of my M7. I am not sure if the bass has achieved the final stable state now but M7 fully satisfies my bass requirements (depth, extension, impact).
Also consider the quality of your power source: My Audio-GD stuff has always been sensitive to the quality of the power line. I tried some cheap filtering products but the SQ results were inferior than in case of direct connection to a wall power socket. This applies also to the bass department. I would recommend to all users of A-GD products to disconnect cheap filtering products and try the direct connection to a wall socket. Or try some power conditioner. In my case, PS Audio Power Plant Premier worked very well with my A-GD Reference ONE DAC and Phoenix - it was the best solution for these A-GD products (better than the direct unfiltered connection to a wall socket).
That's exactly what I noticed when I tried that recently with the NFB-27.
The bad thing is: my rig consists of the NFB-27 as DAC only connected to the SA-31, so I need 2 power sockets...
Back a few weeks ago, I was using a cheap power strip for all my gears. I was not satisfied with the NFB-27 which I found to be hard sounding (fatiguing). The worst case was when I used it standalone (as a DAC+AMP). When connected to the SA-31, this hardness was tamed but it was still slightly annoying. The Metrum Quad did not suffer from such issue (I wrote several times on this forum that I preferred the Quad over the NFB-27, though it was clearly apparent that the latter was more technical. This was due to this hardness. Now that I managed to fix/limit this issue, I put the Quad for sale ;) ).
As a last resort before selling it, I tried to connect the NFB-27 directly to the wall socket. Guess what? That listening session was the best I had in many months!
Yet, connecting the NFB-27 to the SA-31 is even more enjoyable!
Now, I need to find a power conditioner or a good power strip on which I could connect both Audio-GD gears.
The Yulong P18 is the only one that comes to mind: does anybody know if it's worth it?
Edited by Clemmaster - 4/5/13 at 1:11am