Best powercables for Martin Logan 15A speakers

I was not able to get a close up of the male IEC on the back of the speaker. I think you have to be careful because I can't tell if all power cords will fit it or if you need a specific shaped female IEC at the end of the power cord. I say this because my Von Schweikert DB 99 speakers required a specific shaped female IEC to fit into the back of the speaker. None of the power cords I had at the time would fit into the recessed opening. 

My ML Aerius accepts standard (female) IEC plug. You can try different power cords but I have been told the MLs, at least the ones without powered woofers, do not respond to changes in power cords. Keep us posted on what you fid out. 

I had SL3s for a number of years. I could never hear a difference between power cords. I did have a problem with the large heavy power cords slowly coming loose. In the end I just used the original cords. If I still had my SL3s today, I might try the Shunyata Venom that are the same size and shape as the standard power cords.

Use anything that's well made at a reasonable price. High end power cords won't have any impact on sound quality.