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Post by novisnick on Jul 12, 2015 15:14:28 GMT -5
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Post by vneal on Jul 12, 2015 15:34:09 GMT -5
Unplug your turntable. I bet your buzz problem is now isolated. Get a better pre phono amp
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Post by novisnick on Jul 12, 2015 16:01:39 GMT -5
Unplug your turntable. I bet your buzz problem is now isolated. Get a better pre phono amp My friend, I wish you had read the thread before you made a suggestion as to what was wrong with my system. im spinning vinyl in my cave not the system in question on this thread. First, there is NO TT in the system ,,,,,,,,yet!  Second, the only time there is a problem is in HT Bypass!  Third, the XSP-1 is a dang good pre! But while your suggesting it, which phono pre in the same price range are you speaking of, or prefer?  Now what is your constructive solution?  |
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Post by rocky500 on Jul 12, 2015 19:31:59 GMT -5
I have also switched my system to all Shielded power cables and shielded Interconnects. The Emotiva power cables look good but I brought ones with AU plugs on them. These are the Interconnects I brought. They are shielded, very flexible with great connectors and not expensive. Also sound great too. www.ghentaudio.com/part/a01.htmlAll in the hope it may help to keep buzz and hum away now and in the future as I change components. |
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Post by autocrat on Jul 12, 2015 19:40:07 GMT -5
I have also switched my system to all Shielded power cables and shielded Interconnects. The Emotiva power cables look good but I brought ones with AU plugs on them. These are the Interconnects I brought. There are shielded, very flexible with great connectors and not expensive. Also sound great too. www.ghentaudio.com/part/a01.htmlThey also have arrows on them so that the electrons know the direction in which to vibrate  |
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Post by rocky500 on Jul 12, 2015 19:43:01 GMT -5
I have also switched my system to all Shielded power cables and shielded Interconnects. The Emotiva power cables look good but I brought ones with AU plugs on them. These are the Interconnects I brought. There are shielded, very flexible with great connectors and not expensive. Also sound great too. www.ghentaudio.com/part/a01.htmlThey also have arrows on them so that the electrons know the direction in which to vibrate That is I think as the shield in connected at one end only on RCA Interconnects. I think at the source but would have to look that up. If I remember correctly, if you connect both ends, it can act like an antennae and can be prone to pick up RFI. |
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Post by Gary Cook on Jul 12, 2015 20:55:40 GMT -5
Checked the buzz frequency yet Nick?
I suspect that even in By Pass the XSP-1 still can have noise induced from other sources via the common/ground/earth. So the first thing I would do is unplug everything from the XSP-1 but the processor, the power cord and a pair of headphones. I'd having nothing connected to the processor but it's power cord and the interconnect to the XSP-1. If the buzz is there then I'd try swapping the XSP-1 power cable to one with no earth pin. If the buzz is still there then I'd try swapping the processor power cord to one with no earth pin. Then try both power cords with no earth pins.
That's just the first step in elimination, but I usually find something by going through that process. Let me know how you get on and if no success we can move to step 2.
Cheers
Gary
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Post by novisnick on Jul 12, 2015 21:13:07 GMT -5
Checked the buzz frequency yet Nick? I suspect that even in By Pass the XSP-1 still can have noise induced from other sources via the common/ground/earth. So the first thing I would do is unplug everything from the XSP-1 but the processor, the power cord and a pair of headphones. I'd having nothing connected to the processor but it's power cord and the interconnect to the XSP-1. If the buzz is there then I'd try swapping the XSP-1 power cable to one with no earth pin. If the buzz is still there then I'd try swapping the processor power cord to one with no earth pin. Then try both power cords with no earth pins. That's just the first step in elimination, but I usually find something by going through that process. Let me know how you get on and if no success we can move to step 2. Cheers Gary Glad your back on line Gary, I'll go and do that right now! BRB |
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Post by novisnick on Jul 12, 2015 21:38:26 GMT -5
Only thing connected to both the Yamaha and the XSP-1 are the amps and they're running from the XSP-1
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Post by novisnick on Jul 12, 2015 21:42:53 GMT -5
Still a buzz
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Post by Gary Cook on Jul 13, 2015 2:19:04 GMT -5
Disconnect the amps and try it using headphones.
Sorry for the absence Nick, flying from Rome to Budapest yesterday.
Cheers
Gary
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Post by mgbpuff on Jul 13, 2015 7:53:33 GMT -5
novisnick, have you tried using a ground lifting isolator on the XPS-1 power cord?
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KeithL
Administrator 
Posts: 10,255
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Post by KeithL on Jul 13, 2015 8:39:52 GMT -5
If your buzz is from a ground loop - which it almost certainly is - then there is probably no individual component to blame. It happens because of the way the grounds of multiple components interact with each other. This can be because there is a noise voltage between the grounds on different outlets, or because of the way one or more pieces of equipment is wired internally, or because of how the interconnects are grounded. (Let me emphasize that, in most cases, none of the equipment individually is causing the problem, and none of it is "wrong".) Of course, it CAN also be caused by things that ARE wrong; a very common cause is a cable box that isn't properly grounded, which happens when the wire isn't properly grounded where it enters the house. When you then connect that cable box to the rest of the system, it "messes up" the grounding of the entire system, and can cause unrelated components to hum (just by being connected to one of them - even if the input it's connected to isn't selected).
Someone mentioned lifting the ground on one end of each (or one) interconnect. This is indeed something that MIGHT help, which is why pro equipment, which often has to work in a variety of locations and setups, has a switch for doing so. It may also cause a ground hum problem if none exists already, so it isn't something you should do unless you have a problem you're looking to fix. There's also a HUGE caution there..... usually you only break the ground at ONE END of ONE INTERCONNECT. If you use two interconnects, and each has the ground lifted at one end, then you have no signal ground between the two pieces of equipment. This is OK, and may help, ONLY IF BOTH PIECES OF EQUIPMENT ARE GROUNDED TO YOUR POWER SYSTEM - but not all audio equipment has its circuitry grounded through the power lines. And, if you connect ungrounded interconnects to the inputs on a piece of equipment that doesn't have a power-system ground, then you will have a massive amount of hum (quite possibly loud enough to blow out your speakers). And, if you have several pairs of interconnects in which one of each has a lifted ground, you need to be very careful to avoid mixing them up, and ending up using two ungrounded interconnects together.... When pros use cables with broken grounds, they should always be clearly marked - because they should only be used with proper precautions. Also note that disconnecting the SHIELD at one end is not exactly the same as disconnecting the ground. Some cables use a separate shield, and, on those, you can disconnect one end of the shield, while leaving both ends of the ground wire - and so the ground connection - intact.
(I'm not suggesting that you shouldn't experiment, or that breaking one or more grounds might not even solve the problem, just that you need to be VERY careful when doing so. This is especially so with a piece of equipment that is connected to multiple other pieces of equipment. If several of those interconnects have broken grounds, you can end up with a situation where you can disconnect most of them, and nothing much happens, until you reach the point where you've disconnected the last grounded one, at which point you touch something and get a huge blast of speaker-destroying noise. So DO be careful.)
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Post by Gary Cook on Jul 13, 2015 8:57:51 GMT -5
Keith is spot on, that's what I suggested only 2 components connected and no power amplifiers, cheap headphones or buds will do just fine.
Cheers
Gary
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Post by novisnick on Jul 13, 2015 9:21:01 GMT -5
Note; the buzz comes from the speakers and not the Pre or AVR, I'm not sure that I've mentioned this fact. KeithL, I think your on it, but what do I know? The pre amp has a ground plug and the AVR does not, so most likely grounded the way you say,,,,,,,,,? I only have the pre & AVR connected with a set of XPA-1Ls, I tried the headphones on both the Pre & AVR with no buzz in HT Bypass mode. I haven't tried this with no amps, you don't get a speaker buzz without amps So what to do now???  |
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Post by Gary Cook on Jul 13, 2015 9:34:18 GMT -5
Note; the buzz comes from the speakers and not the Pre or AVR, I'm not sure that I've mentioned this fact. KeithL, I think your on it, but what do I know? The pre amp has a ground plug and the AVR does not, so most likely grounded the way you say,,,,,,,,,? I only have the pre & AVR connected with a set of XPA-1Ls, I tried the headphones on both the Pre & AVR with no buzz in HT Bypass mode. I haven't tried this with no amps, you don't get a speaker buzz without amps So what to do now? I have most definitely experienced humm using headphones and a pre amp alone, no power amps or speakers required. If I read your response correctly when you tested just the processor and the pre amp connected and with headphones there is no buzz, correct? But when you connect the power amps and speakers Nick's buzz returns? Actually let me take a step back, your not going to quickly and simply solve this problem, Nick, there's unlikely to be a silver bullet. So you are going to have to work through it one step at a time, no shortcuts. Cheers Gary |
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Post by novisnick on Jul 13, 2015 9:35:48 GMT -5
I'm guessing this tells the tale,,,,,,,,,one has a ground plug and the other doesn't!!!
But how can a " novis " fix this problem?
The speaker buzz does not get louder and gets covered up when I turn up the volume,, BUT IT SURE BOTHERS THE HECK OUT OF ME!!!
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Post by novisnick on Jul 13, 2015 9:38:39 GMT -5
The amps are connected and the buzz in the speakers is there only when I turn on HT Bypass. Dead silence in headphones but has speaker buzz in this situation.
Any other source is dead silent
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Post by novisnick on Jul 13, 2015 9:40:36 GMT -5
Both units are dead quiet, it's the speakers that buzz when HT Bypass is engaged
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Post by Gary Cook on Jul 13, 2015 11:37:57 GMT -5
There's a number of possibilities;
One possibility is that there is a loop from the power amps back to the processor via the pre amp. Keith's suggestion of trying only one channel of a pair of connectors without an earth is one I would try. Got any old RCA to RCA pair interconnects? If so remove the earth/shield from one channel and use the cable as an interconnect between the processor and the pre amp. Read Keith's explanation as to why it's important to be prepared for a loud noise.
I wouldn't suggest doing it between the pre amp and the power amps, that's risky.
With any luck that might just eliminate your buzz.
Cheers
Gary
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