Powering down

After a power-down of 5-6 hours I would have thought everything would be back on-song within 24 hrs. Max 48.  

I love this 'power down' thing, which makes a simple process sound all technical and complicated, and something you need special training for. Turning it off is what we are talking about, like turning off the telly or the toaster. 

As it's been running for a couple of months, it will be back on form by the following day at the very latest. If your dealer thinks it will take two or three weeks, that's absolute codswallop. 

Your dealer must be blessed with golden ears

Thought so as well...

Hungryhalibut posted:

I love this 'power down' thing, which makes a simple process sound all technical and complicated, and something you need special training for. Turning it off is what we are talking about, like turning off the telly or the toaster. 

As it's been running for a couple of months, it will be back on form by the following day at the very latest. If your dealer thinks it will take two or three weeks, that's absolute codswallop. 

Now be fair, Nigel.  I bet you are studious in switching off your 250DR before your 272, and in reverse when switching back on.  

I agree the OP's dealer is talking codswallop, though.

Mike

Probably more to do with the dreaded naca5 cables than the boxes .

take them out , roll them up and keep somewhere dark and warm like an airing cupboard.

A day or two at most IME. 

thijazi posted:

how long does it take the system to go back to warm up fully to "working temperature" and stabilize?

one or two hours, given it is already past its run in period.

MDS posted:

Hungryhalibut posted:

I love this 'power down' thing, which makes a simple process sound all technical and complicated, and something you need special training for. Turning it off is what we are talking about, like turning off the telly or the toaster. 

As it's been running for a couple of months, it will be back on form by the following day at the very latest. If your dealer thinks it will take two or three weeks, that's absolute codswallop. 

Now be fair, Nigel.  I bet you are studious in switching off your 250DR before your 272, and in reverse when switching back on.  

I agree the OP's dealer is talking codswallop, though.

Mike

 

Well, yes, one should turn the power amp off first. It's just the 'power down' description that amuses me. I don't hear my wife saying 'for goodness' sake, power down those nasal hair clippers'......

I like the use of the the term 'power down' because it has connotations of waiting for a Naim component to gradually lose power. I tend to consider the term 'turn off' to be immediate. The expressive power of words has different meanings to all of us

Just had my system off for barely over 2 weeks whilst some room repair, remodeling and painting was done.  On turning on ("powering up") it definitely sounded way out of kilter, and this most noticeable in the bass, which tends to be flaccid and non-focused.  There is no focus to the image either.  It improved in a few hours, but by early the next day it was much better, and now 2 days later the system is just fine...can't tell it was ever off.

 Two weeks?  Maybe fresh from the factory to break in.

Since this is most noticeable in the bass region, it may explain George's metric of 20 minutes, since his speaker can't produce bass!  (I am only teasing you George, it was too tempting to resist! )

This most recent experience squares with what I have noticed every time I have had the system off for any extended period of time.  For as short as yours was off I would expect it to be even less pronounced.  When I have done it for thunder storms where it is off over night at most it takes less time.

Things do not  need to be re-burnt in. You only do that once. 

But a power off period will change the temperature of the units and the time it takes to come back on song is going to depend on how long things take to reach their cruising temp. Power amps generally warm up and come on song in an hour but pre amps without internal power supplies take a day or so. 

It is highly dependent on which bits you have as they will warm at different rates. Having lived in semi siberian and tropical climates, I can confirm that power ups have less impact where the ambient room temp is high.

But we all have to power down occasionally. I would not lose sleep over it.

MDS posted:

After a power-down of 5-6 hours I would have thought everything would be back on-song within 24 hrs. Max 48.  

This aligns with my experience. It depends how long it is off for too - if for a few minutes then it comes back quickly, if a few days then about a day to start to sound really together and a few days to sound happy.

I understand people hearing it differently - it will depend on the system to a large extent.

DB.

I guess I been powering down without realizing it, My system is generally powered 24/7 unless there is a threat of a storm!

""LIGHTNING

No power strip or conditioner can protect your system from lightning, your system's worst enemy.

Lightning raises the voltage on the ground side of the line, and can not be protected against--except by unplugging the system during a storm.""

This is of course a question of degrees. One should be able to enjoy a freshly re-powered system after about ten minutes at most.

It can however, take a week or two to achieve the last five percent of stabilised performance; dependent upon one's hearing acuity; paranoia-state, phase of the moon, level of madness etc etc.

John.

J.N. posted:

This is of course a question of degrees. One should be able to enjoy a freshly re-powered system after about ten minutes at most.

It can however, take a week or two to achieve the last five percent of stabilised performance; dependent upon one's hearing acuity; paranoia-state, phase of the moon, level of madness etc etc.

John.

 

You forgot to mention proximity to ley lines for the higher frequencies and whether the groundhog saw its shadow or not for the low frequencies.

Once a week shutdown here. After rebooting everything, the system is back on song in about 30 minutes. It seems better with this routine, but it could just be the weekly period of abstinence. Like other things.

Jan-Erik Nordoen posted:

Once a week shutdown here. After rebooting everything, the system is back on song in about 30 minutes. It seems better with this routine, but it could just be the weekly period of abstinence. Like other things.

You're not imagining things. I find a power cycle of the 250.2 does wonders if done every few weeks. Not off long enough to cool down. Maybe just a few minutes. I don't do this with anything but the power amps.

OK, that had also been my dealer's advice in the past (just the power amp).

At the source end, the UnitiServe gets shut down every night. It just doesn't feel right to keep a computer running. Besides, it's on song once booted up.

Interesting, was not aware of this, so your dealer suggested turning off the Power Amp for a few minutes every couple of weeks?

       i turn off my xpsDR sometimes when playing vinyl records( sound better),  my cdx is back on song very soon after switch on.          john.

My house powered down today and the kit was off for a couple of hours. It has now been warming up/running in for a couple hours. It was a bit dodgy but now is back on song. If this helps.

Dave

Thanks, same here, once the electricity was back it took about a day for it all to fall back into place nicely...