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View Full Version : Pre and power , ON/OFF sequence?


andyrlb
22-05-2019, 09:56
I am currently following the same procedure as I read on a naim site .
In regards to my Alchemist pre & power is this correct:
Power on :
Sources
Power supplies and preamp
Power amp

Power off is apparently the reverse.

Cheers


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hifi_dave
22-05-2019, 09:58
Exactly.

Though, if it was a Naim, you would have to leave it to warm up for 3 months or else all the 'prat' goes out the window.
andyrlb
22-05-2019, 09:59
Exactly.

Thanks Dave


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struth
22-05-2019, 10:08
always good practice to have vol at zero before you do any of that. interestingly my quad does exactly that by itself, lowering vc to zero before coming on.
andyrlb
22-05-2019, 10:23
always good practice to have vol at zero before you do any of that. interestingly my quad does exactly that by itself, lowering vc to zero before coming on.

I do just that mate, still get that little thud though


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struth
22-05-2019, 10:29
Probably doesnt have a soft start section; if its naim it wont have. Not much u can do bar disconnecting speakers. Amps having speaker switches were handy for that.
Yomanze
22-05-2019, 13:30
always good practice to have vol at zero before you do any of that. interestingly my quad does exactly that by itself, lowering vc to zero before coming on.

I tend to flick the source selector to a non-active input too, because I tend to leave my gear on, but switch my hot Class A DAC off when not in use.
YNWaN
22-05-2019, 14:50
Exactly.

Though, if it was a Naim, you would have to leave it to warm up for 3 months or else all the 'prat' goes out the window.

I thought that only happened when a dealer stops selling it.....
hifi_dave
22-05-2019, 17:00
Not really. Some dealers have always always thought the 3 month warm up thing was ridiculous.
Ninanina
22-05-2019, 18:50
I always kept the Naim bits n pieces powered on all the time which, I believe, is the recommendation..

It's the one thing I miss about the Naim's ... as I don't leave the ML's switched on so have to wait just a little while for them to heat up a bit....

Does anyone know if I could indeed leave the ML's switched on the whole time? The only reason I switch them off at the moment is that they both get pretty warm, unlike the Naim's
Ninanina
22-05-2019, 19:09
I don't get any 'thud' sound through the speakers when I switch the ML's on but certainly the Naim amp did
Macca
22-05-2019, 19:33
Isn't your ML class A? You don't want to be leaving that on all the time. It's a daft idea anyway. It won't perform any better and it will fail sooner.
Ninanina
22-05-2019, 20:20
Isn't your ML class A? You don't want to be leaving that on all the time. It's a daft idea anyway. It won't perform any better and it will fail sooner.

I think it partly operates in class A Martin and, as you say, I don't think leaving it switched on all the time is very good for it
Joe
22-05-2019, 21:34
I don't get any 'thud' sound through the speakers when I switch the ML's on but certainly the Naim amp did

Same with Exposure amps. The 'thud' made me jump the first time I experienced it, with an Exposure X amp, many years ago.
Ninanina
22-05-2019, 21:36
I'm not sure the 'thud' can do the speakers much good do you think ?
Joe
22-05-2019, 21:43
I'm not sure the 'thud' can do the speakers much good do you think ?

It's never harmed mine, and I've been using my current Exposure amps for more than 20 years, but as Grant said, it's always a good idea to turn the volume down as low as possible before switch-on. Once, one of my children must have moved the volume round nearly to maximum. The sound at switch-on gave me (and the cats) a bit of a shock, but the speakers survived.
Ninanina
22-05-2019, 21:58
It's never harmed mine, and I've been using my current Exposure amps for more than 20 years, but as Grant said, it's always a good idea to turn the volume down as low as possible before switch-on. Once, one of my children must have moved the volume round nearly to maximum. The sound at switch-on gave me (and the cats) a bit of a shock, but the speakers survived.

Oh poor you, and the cats.... ;)

When I switch any amp on I have the volume at zero, it's just something I've always done to be honest... good practice I think...:)
Pharos
22-05-2019, 23:36
In my experience the thud is more a result of vast current surges occurring with power amp power supplies than anything else, but 'soft' circuits are now avoiding this.
hifi_dave
23-05-2019, 10:03
I always kept the Naim bits n pieces powered on all the time which, I believe, is the recommendation..

It's the one thing I miss about the Naim's ... as I don't leave the ML's switched on so have to wait just a little while for them to heat up a bit....

Does anyone know if I could indeed leave the ML's switched on the whole time? The only reason I switch them off at the moment is that they both get pretty warm, unlike the Naim's

Put them in standby when not in use.