05-28-14: Almarg
Regarding the Acurus A100, one factor that may be in play is that its input impedance is only 20K, which may be too low to be optimal for use with the Lightspeed. You might want to ask George about that, either directly or in the Lightspeed thread. The output impedances of your sources will be a factor in that, since with a resistance-based passive attenuator the impedance at the output of the attenuator will depend to some extent on the output impedance of what is driving it (as well as on the volume control setting).
Regarding your question about the rest of your equipment, I see nothing that particularly stands out as a weak link. I'm assuming that you've kept the length of the cable at the output of the Lightspeed short, as it should be.
Regards,
No problem Almarg with B limo using the Lightspeed with this setup as his Parasound Z dac has a low 160ohm ouput impedance, which can easily drive the combined Lightspeed and Acurus load of 6.6kohm.
As always use up to 2mts interconnects of low capacitance less than <100pf (picofarad) per foot, which most quality ones are anyway, from Lightspeed to poweramp/s.
If higher capacitance 200pf per foot then 1mt should be used.
Cheers George