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Feedback/rumble with my pioneer pl-514

ShelbyDenim

ShelbyDenim

New Member
Hello All!

I am new to this site and I'm not quite sure where I should be posting this but I'll start by saying I'm happy to have found this site. I've browsed different forums for a while now for advice but now I have a problem of my own I'd like some feedback on. I appreciate any advice as I'm getting pretty frustrated. I have a pioneer pl-514 and I've been experiencing a rumble/feedback type noise at higher volumes when the bass is turned up. I've tried moving the turntable to different locations and putting my speakers as far away from the turntable as possible but I still get the rumble/feedback. Convinced there was something wrong with the turntable I purchased another pl-514 and I still have the same issue. I have tried the turntables on 3 different receivers with 3 different sets of speakers and still I get the feedback. I even took the turntable to a friends house to test it there and shockingly it did not rumble at my friend's house. My friend even has the same shelf as me with his speakers in the same spot as mine and there is no rumble/feedback when the turntable is hooked up at his house. I have a Stanton turntable a friend gave me and I don't have this problem when it is hooked up at my house. I'm at my wits end. Can someone please give me some advice? The rumble only occurs when the needle is on the record. This does not sound like a hum so I'm not sure if it's a grounding issue. I have tried connecting a wire to the ground post on my receiver and touching it to the middle screw on the wall outlet and this did not help.
 
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The Gryphon said:
Hello and welcome to the forum ........Feedback is a loop it is a cycle in which a sound is generated passed back through the air or a suitable material into your amplifier and then goes through back out through the speakers and to the place where it was generated. Now often the conducting medium is the air and so it is possible that you have this as your conducting medium. A turntable is a sensitive thing and needs to be well away from the speakers .I personally favour 2 or 3 meters away this could be the problem. The next possible situation is arm resonance , if the compliance of the cartridge does not match the requirements of your arm them there will be a tendancey for the cartridge to be over sensitive to external vibration or warps in the record. We would need to know what cartridge you use, the effective length of your arm and the compliance of your cartridge to look at that. If this is then feed into a compatibility calculator like the one which is on the site "The Vinylengine" you can see where your arm resonance lies. If this is in the wrong range this could be the problem and adjustments need to be made.

The rumble , I don't know the exact figures for your deck but a figure of -60 to 75 dB is usual for a belt driven turntable . Now at high volume that does mean that slight amount of rumble will be heard at high volume. This can be reduced by lubrication and cleaning of the mechanism at the centre of the table. In addition, using a poor quality after market belt can raise the rumble figure.
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Thank you very much for your repsonse. I'm relatively new to this so please bare with me. I'm honestly not sure what cartridge came with The turntable so I'm posting a picture of it. My friend has the same turntable and I tested mine by attaching his headshell and still there was rumble/feedback. I tried the turntable at his house and it does not rumble or have feedback. Could this possibly be a problem with the wiring in my house (it's an old house) thanks again for your help, please see that picture of my cartridge.
 

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ShelbyDenim said:
Thank you very much for your repsonse. I'm relatively new to this so please bare with me. I'm honestly not sure what cartridge came with The turntable so I'm posting a picture of it. My friend has the same turntable and I tested mine by attaching his headshell and still there was rumble/feedback. I tried the turntable at his house and it does not rumble or have feedback. Could this possibly be a problem with the wiring in my house (it's an old house) thanks again for your help, please see that picture of my cartridge.
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When you say you moved your turntable to different locations does that mean in another room or another outlet? If you live in an older home it could be caused from your wiring of your house or an appliance that is running and on the same circuit as the turntable. If you did not move your system to into a different room and different outlet try that.
 
daveyh said:
When you say you moved your turntable to different locations does that mean in another room or another outlet? If you live in an older home it could be caused from your wiring of your house or an appliance that is running and on the same circuit as the turntable. If you did not move your system to into a different room and different outlet try that.
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Thank you for the advice. I tried the turntable in different rooms on different outlets with different receivers and different speakers and still I got the rumble feedback type noise. I turned off everything in my house lights included and still I got the noise. I unplugged my cable and Internet and still I got the rumble. The noise doesn't occur when I plug the turntable up at a friends house. I even purchased another pl-514 and its doing the same thing. I have a Stanton dj style turntable a friend gave me but the noise does not occur on the deck when using it in my house. I'm baffled
 
The Gryphon said:
Yes I would go with that I'm not sure the AT 95 E is a green plastic housing for the stylus...I know there are after market repacements for this that are yellow but I believe other ATs could have a yellow housing.
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Thank you. I did indeed replace the stylus, sorry I should have mentioned that
 
The Gryphon said:
Yes I would go with that I'm not sure the AT 95 E is a green plastic housing for the stylus...I know there are after market repacements for this that are yellow but I believe other ATs could have a yellow housing.
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I did try a totally different headshell with a different cartridge that my friend uses on his pl-514 and I still got the noise (this was done at my house)
 
daveyh said:
When you say you moved your turntable to different locations does that mean in another room or another outlet? If you live in an older home it could be caused from your wiring of your house or an appliance that is running and on the same circuit as the turntable. If you did not move your system to into a different room and different outlet try that.
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Maybe I should try unplugging my fridge?
 
I am not saying it will work but I do know several people who use them. Sometimes it does work but I do know one guy who bought one and it did not work for him. He had to do a partial rewire on his house because of this type of problem. His house was built in 1952.
 
I really doubt it's hash from electrical interference. First, your buddies system isn't yours so really apples to oranges and most likely just confusing the issue.

You mention it's worse with the bass turned up, this makes it obviously acoustic feedback of some sort. My first suggestion, set the bass control to flat, if the loudness circuit is engaged then turn it off. If your amplifier has a rumble or low frequency filter turn it on.
 
daveyh said:
I am not saying it will work but I do know several people who use them. Sometimes it does work but I do know one guy who bought one and it did not work for him. He had to do a partial rewire on his house because of this type of problem. His house was built in 1952.
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Just tried shutting off my central Air conditioner as well still feedback
 
Just for laughs try using some different speaker wire. Kind of doubtful, but it's a variable.
 
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