I also use both the interconnect cells and speaker cells without any issues. Have you contacted Synergistic Research?
Issue with SR Univrsal Speak Cells?
Has anyone had trouble with incompatibility between the SR Galileo Universal Speaker Cells and their amplifier. I keep blowing fuses in one channel every time I power up. Checked continuity with all paths and is fine. Have cells installed between source and pre and also between pre and amp without any issue. System runs fine when I eliminate the cells. Amp uses KLK-5 fuses at $8ea and is getting pricey to keep experimenting.