I purchased the generic RCA Caps from Parts Express. I can't tell the difference between them or the Cardas ones visually. I've put them on varying pieces of equipment in my mostly mid-fi solid state systems and I haven't heard a difference either way with them in place. I've put them on preamps, CD players, integrateds even on a subwoofer amp and I could hear no difference. I agree with Theo to look at the caps with the little knobs on them. The generic caps I have can be hard to remove if your RCA jacks are in a tight space.
