starting equiment that ic cold from being shipped


Is it a real thing that you court problems if you turn on an ice cold amplifier or pre-amp without waiting 24 hours for temperature to rise.  I have long awaited Krell FPB and KCT shipping tomorrow,  It's single digits in the Midwet.  Should I wait a full 24 hours for the equipment to warm inside before introducing any electricity into the components?

bossa

Showing 10 responses by bossa

Gentlemen,
I have started my engine and it is good to be back in high fidelity. Thank you all for your input. I fed the units power in standby after about 30 hours of getting warmer. I concluded that while still cold, the amp was warmer than the cold bottle of beer I was to use as yardstick for safety. It remained in standby for several hours and then I turned everything on but muted with no music for a couple more hours. I am now playing music and boy it just keeps getting better, as these warm up. I expect them to be cooking in another three hours or so. I feel fortunate to live in a time when we can bring such great sounds and great musicians into our living rooms. For the vast majority of history, people had no access to such pleasures.

That's a good point but both Krell and other google responses made me doubt the safety of turning on ice cold equipment.  Condensation could take out boards say some google posts.  It's amazing how cold it stayed the last time.  After 12 hours the amplifier still felt like a block of ice in my living room.

Yes, they do but when a cold object meets warm air moisture forms.  Just look at windows.

I was told specifically by the Krell repair manager to NEVER blow a hair dryer into the amp, so that won't be happening. 

This logic is what made me think keeping it wrapped will prevent condensation from happening quickly. 

From Quora:

 

This isn't so much about warming up. This is to prevent condensation from forming inside the device. I wear glasses and when the temperatures outside are close to 0°C or below, and I walk into a crowded bar, condensation forms instantly on the glass. When the air outside is cold and dry, and you bring your equipment into a room where the air is warm and humid, condensation will very likely form. It's best to keep the device sealed and let it sit for a minimum of 2-3 hours. Some recommend as much as 24 hours. This way you can ensure that as the device gradually warms up to room temperature, condensation does not form, and even if it does it gives it time to evaporate.

"My frost knee jerk..."  I guess auto correct is warning me to wait!   Krell advised waiting but had to be asked.  There was no proactive warning but after reading other sources, I decided that there is a chance of problems and since shipping costs me around 500 round trip, I will wait.  Most things i have read suggest that leaving the items wrapped is a good thing as it hinders condensation from forming inside box and plastic wrapping and acclimates slowly.  I will wait at least 24 hours and continue to play my toy stereo from Goodwill.

 

@barts @feldmen4 @dekay Ok, i have anywhere from 24 hours from the chemical engineer, to four days from barts.  I really don't think I need to wait longer than 24 hours but I would like to hear the logic for such a long period of waiting.  I thought i was showing restraint to wait 24 hours and keep box sealed.  :)  I'm not sure I can stand it to wait that long unless you have a strong argument for why it would take that long for amp to come to room temp or any condensation to dissipate.  Thanks to all who are giving me advice and opinions.

@bobpyle  No, the obvious didn't escape but I haven't spoken to the dealer in years and won't.  I spoke with Krell because the amp/pre-amp is long out of warranty, I paid and it's my issue.

@feldmen4   Wow, thanks so much for this detailed analysis.  My balloon just popped however.  I've been awake for hours thinking that today is the day!  I have kept both boxes sealed as I completely agree that keeping things wrapped will hinder condensation.  I must tell you that the amp has been shipped to Krell 7 times between 2015 and 2021 for repair/recappping/etc.  It has been an audio nightmare, but I so love the combo of the KCT and the FPB 300CX that  I have refused to wave the white flag.  I'm pretty sure they don't pack it back with desiccant after repair.
Waiting 3-4 days seems like torture after so many absences.  I will say that Krell suggested 24 hours.  I spoke to a dealer in Milwaukee (Ultrafidelis) and I spoke to PS Audio who makes DAC and amps.  The tech said he got what i was saying but hadn't seen it as an issue in their business.  I will say that the Krell has many more parts than their offering.  The dealer said if your amp feels as cold as a bottled beer from the fridge, he would wait.  Any warmer than that and he said I could turn it on.  My plan is to do it in stages...first standby for hours and then on but not playing music for more hours.  Thanks so much for your input and expertise.