Do Interconnects need to "warm up"?

I could have you audition 10 cables of various compositions and you wouldn't have a clue if they were copper, silver, gold, or a combination.

No way, no how.

But nobody else could either. The conductor material plays a very minute part in the sonic signature.

With more experience you'll understand this.

Rpg,
I've frequently heard the same thing you have. I also leave my system on most of the time, unplugging only if there's a storm approaching or I plan to be gone for an extended period.

I have no idea what causes it though. My gut feeling is that it isn't the ICs but who knows?

I suspect AF is correct.

My technical gut instincts (which usually serve me pretty well) and personal experimentation with ICs tell me that what matters is the physical configuration of the IC, its impedance characteristics within teh system it exists in, its ability to transmit all frequencies in phase and ability to shield/protect against external EM fields when needed that mostly matters.

USe of exotic materials just ups the cost and snob appeal perhaps but probably is not a major factor in sound.

Just my technical gut assessment. VEry little relating to ICs is proven in the usual scientific sense.

I think Hifihvn makes sence of cooling cables vs. worming up. Designing freeze packs for cables might be the next crazy tweak in the audiophile business.