Smurfin
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hi all
Wonder if anyone can give me some advice please? A few weeks ago I bought a Rotel 985 mkI 5 channel, THX power amp from the classifieds. Unfortunately I needed longer interconnects than those that came with it, so it wasn't until 2 weeks after I'd received the amp that I got to try it out properly.
I've bought some good quality Belden interconnects, and have hooked them up from the poweramp to the pre-outs on my Pioneer AX5i. The problem I have is a low level - but distinctly audible - buzz/humming sound. The noise is constant unless the AX5i is switched off, in which case the humming changes slightly, but is still there. Only when the poweramp itself is switched off does the humming completely stop (as you would expect). The buzzing is also audible in EVERY channel.
The possible causes could be:
* The AX5i is the problem, and is introducing noise into the chain.
* The interconnects are the problem
* The poweramp is the problem
* It's a simple mains issue
I don't believe it's the AX5i as previously I had active monitors hooked up to it via the pre-outs, and there was no hum/buzzing at all, regardless of what power sockets in the room were used.
I don't believe it's the interconnects as this morning I've tried a couple of others and the hum has not changed or disappeared
The most obvious answer is a mains issue, but then I've previously had 5 powerful active monitors in my room and there's not been ANY issues with hum (but I don't know if this means that other kit should be fine also).
Which leads me to believe that the problem lies within the power amp. But what exactly could the problem be? Is there a way round it? Has anyone come across this before?
Advice would be appreciated, because as of this morning I've removed the poweramp from my system....I really can't cope with that buzz
I would add that the guy who sold me the poweramp has been helpful so far, and this post isn't intended to get a refund of the money I paid. I just want the poweramp to work
Cheers
Matt
Wonder if anyone can give me some advice please? A few weeks ago I bought a Rotel 985 mkI 5 channel, THX power amp from the classifieds. Unfortunately I needed longer interconnects than those that came with it, so it wasn't until 2 weeks after I'd received the amp that I got to try it out properly.
I've bought some good quality Belden interconnects, and have hooked them up from the poweramp to the pre-outs on my Pioneer AX5i. The problem I have is a low level - but distinctly audible - buzz/humming sound. The noise is constant unless the AX5i is switched off, in which case the humming changes slightly, but is still there. Only when the poweramp itself is switched off does the humming completely stop (as you would expect). The buzzing is also audible in EVERY channel.
The possible causes could be:
* The AX5i is the problem, and is introducing noise into the chain.
* The interconnects are the problem
* The poweramp is the problem
* It's a simple mains issue
I don't believe it's the AX5i as previously I had active monitors hooked up to it via the pre-outs, and there was no hum/buzzing at all, regardless of what power sockets in the room were used.
I don't believe it's the interconnects as this morning I've tried a couple of others and the hum has not changed or disappeared
The most obvious answer is a mains issue, but then I've previously had 5 powerful active monitors in my room and there's not been ANY issues with hum (but I don't know if this means that other kit should be fine also).
Which leads me to believe that the problem lies within the power amp. But what exactly could the problem be? Is there a way round it? Has anyone come across this before?
Advice would be appreciated, because as of this morning I've removed the poweramp from my system....I really can't cope with that buzz
I would add that the guy who sold me the poweramp has been helpful so far, and this post isn't intended to get a refund of the money I paid. I just want the poweramp to work
Cheers
Matt