I really like the QB-8 and felt it made a meaning difference to my system. I wrote about it HERE . What is really important with the QB-8 is to ground it with a garden earth. Using it in conjunction with the QX2 and QX4 as mentioned above is also highly recommended.
Nordost QB8
QB8 owners:
What configuration do you use when plugging your gear into the QB8?
I've got good results in the following order, starting from the end of the QB8 where the mains power cable plugs into the QB8:
1) Meridian MS600 streaming endpoint/DAC
2) empty
3) empty
4) Primary Earth Socket - Simaudio P8 pre-amp
5) Simaudio W8 amp
6) empty
7) empty
8) Simaudio 650D Transport/DAC
What configuration do you use when plugging your gear into the QB8?
I've got good results in the following order, starting from the end of the QB8 where the mains power cable plugs into the QB8:
1) Meridian MS600 streaming endpoint/DAC
2) empty
3) empty
4) Primary Earth Socket - Simaudio P8 pre-amp
5) Simaudio W8 amp
6) empty
7) empty
8) Simaudio 650D Transport/DAC