Hi forum members. I was looking for some advice on a recent equipment change.
My existing pre-amplifier failed and I set about replacing it on a tight budget. I bought a Cambridge Audio C500 for a very cheap price even though it was sold as "not tested".
So I set it up into my Arcam P85 power amp and listened to some music. Guess what!, everything worked fine, it was in great condition and it sounded superb.
I was congratulating myself on a bargain but when I shut the Pre-amp down there was a small pop from the speakers and my power amp decided to shut down.
It did this a few times but there was no damage to speakers or power amp.
So my question is, is it safe to carry on using this provided I switch off the power amp before the pre amp?
Also does this fault ring a bell with anyone? I have had a look inside and it is pristine. I cannot see any bad caps etc.
Many thanks for your thoughts.
My existing pre-amplifier failed and I set about replacing it on a tight budget. I bought a Cambridge Audio C500 for a very cheap price even though it was sold as "not tested".
So I set it up into my Arcam P85 power amp and listened to some music. Guess what!, everything worked fine, it was in great condition and it sounded superb.
I was congratulating myself on a bargain but when I shut the Pre-amp down there was a small pop from the speakers and my power amp decided to shut down.
It did this a few times but there was no damage to speakers or power amp.
So my question is, is it safe to carry on using this provided I switch off the power amp before the pre amp?
Also does this fault ring a bell with anyone? I have had a look inside and it is pristine. I cannot see any bad caps etc.
Many thanks for your thoughts.
D
Deleted member 550749
Many thanks for replies.
I thought that it might be worth checking the pre-amp output without any sources attached and just looked at the signal outputs from the phono sockets.
When the pre-amp is switched on there is no output at all.
When I switch off, then 100mv DC appears at the phono socket, which decays steadily to zero after about 10 seconds.
Maybe a bad cap somewhere. What do you think?
I thought that it might be worth checking the pre-amp output without any sources attached and just looked at the signal outputs from the phono sockets.
When the pre-amp is switched on there is no output at all.
When I switch off, then 100mv DC appears at the phono socket, which decays steadily to zero after about 10 seconds.
Maybe a bad cap somewhere. What do you think?
the C500 is a poor construction but very simple, automatically change the power supply capacitors (two of poor quality) but not expensive, you will always have a time lag when switching on and off, this is due to the time it takes to establish the rail P and N, turn on the C500 and give it a few seconds before turning on P85.