How cold is too cold?

[Jaycat]

I have a little Rumble 15 amp I take to jams and acoustic gigs. I like to keep it in the trunk of my car, but how cold is too cold of temperature to be keeping it out of doors like that?

 

[pepj]

I'd not be so worried about temp although I don't leave cabs if near freezing, but I'd be wary of condensation coming into play. So for amps, I dont leave in the car anyway, but near freezing is a big flag to take a bit of care.

 

[agedhorse]

Below freezing isn't a problem, but bringing a cold amp (or anything) into a warm, humid environment can cause condensation until things warm up.

 

[Jefenator]

I used to bring my combo in from -20ºF and the whole front panel would sweat up like a beer mug. Probably not ideal. (That amp did eventually die on me in the summer.)
I've been storing speaker cabs in my truck year round for years & years with no sign of harm that I can discern.
The more valuable and portable (and potentially delicate) a thing is, the more lengths I go to avoid temperature extremities.

 

[S-Bigbottom]

When the electronics and speakers built into your car break from too cold.