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nezff

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    Some helpful ground loop info for those suffering

    in Home Theater

    Posted

    Friday night i spoke with Bill, the owner of Jensen Transformers because i was looking to see what they suggested for my 5 channel setup. I was fortunate that Bills number was handed out to me as i prefer to talk to an actual engineer when it comes to issues with equipment in general. After my conversation with VInce at Emotiva about my XPA-5 hum/buzz and then having Bill explain to me more about ground loops, this is what i believe is going on. My entire setup is perfect and should not have a ground loop, so you may ask, Ian...wheres the issue then? It lies within the rca cables between the pre/pro and the power amp. Bill says that even the slighest mv droppage in voltage will cause a ground loop issue. Vince says that sometimes cords have a connection that just isnt solid enoughin the RCA cord or it gets worn and this can cause a voltage drop. Bill says that with a 6ft cord, its a length where voltage drops will begin to occur more easily.

    I tested this idea out with a different RCA cord, swapping out my emo x series 6ft cord with a 6ft monoprice shielded coaxial and the hum was gone but the tweeter was a bit more staticy than with the emo cord. Its a brutal conclsion to come to that cords are this sensitive, even shielded that this makes and issues with hum buzz. I guess in a way though, it is nice to know that the amp is not the issue and i can officially rule out the XPA-5 for being "noisy" in the hum/buzz kind of way.

    In the future, i am going to try and go with the shortest possible RCA cords of a quality type to prevent this last leg of the journey ground loop. Its hard when you are used to pulling components out to get to the rear of the equipment but i will just have to make it so that i can go around the furniture to access it. Overall it will be better for the equipment to not be moved and shorter runs should help to decrease the ground loop opportunities.

    I hope this helps those who are battling issues like this. If not, those jensen transformer isolaters have pretty kool tech in them. They magenticaaly copy and transfer via magnetics an exact duplicate of the audio signal and have that break so the ground loop is broken. In a way, its great but you could still have bad grounds on either side of the isolater

    Im not going to agree or disagree with your statements. I understand that "feedback" can enter the sytem through a number of ways.

    When I bought my first emotiva amp about 4 years ago(XPA3), I placed it in my old house which of course had old wiring and no ground. I called emotiva because I was getting a buzzing noise out of my speakers that wasnt there before with my ONKYO 876. I tried different power cables, RCA cables, I even ran a dedicated line underground outiside with a ground rod attached. None of this worked. I ended up returning the amp and keeping my 876 to run everything.

    I sold that house and built a new home about a year and a half ago. I bought a new xpa 3 which had more of a very very faint hiss when turned on. I knew I had a new house, new wiring, new breakers etc.... I didnt expect to have a buzz at all. Well I was sorda wrong. I had a somewhat form of the buzz but you would have to put your ear all the way against the horn of my RF63 to hear it. I have all brand new blue jeans RCAs between my XPA5 and Onkyo 5508. I have tried xlrs and RCAs with no luck. Granted the hiss or small buzz is so small that it wouldnt bother anyone because no one would know of it unless I told them.

    Three XPA amps(xpa3, xpa3, xpa5) multiple cables(xlrs monoprice, blue jeans RCAs), three different avr/prepros(Pioneer, 876, 5508), and two different house, all had the the buzz or hiss.

    The buzz or hiss I hear now in my new house is so faint it is almost inaudible. I have talked to numerous people with this same problem. Klipsch, emotiva, audioholics, AVS, Home theater shack forums all are riddled with the same problem. i have also talked to many people that say they dont hear a hiss or buzz at all even with their ears up to the speakers.

    One more thing, when swapping back to just a AVR eliminated the buzz from me hearing it, but honestly I think the amp just amplified the buzz is all. I think it is there no matter what sometimes.

    This is how good Klipsch's warranty is!!

    in Home Theater

    Posted

    I noticed a while back that my RF62s (surrounds) vinyl veneer was coming up. A couple spots looked like it was rippling and eventually it would come up also. It was happening on both speakers.

    I called Klipsch to ask them about the warranty considering these speakers are 3 years old. I was told to call my dealer. I then called the place I bought them and they sent someone out with a camera to take pictures. A day or so later, I was told to get the serial numbers. I gave the serial numbers to the dealer, and then was called back today. I was told that Klipsch wants me to take my speakers to the dealer where they are issuing a call tag to have them shipped back to them. I was also told I would be getting two BRAND new RF62s.

    Right now I just wanted to let everyone know this and I will be updating the thread with the progess. Hopefully all goes well.

    thanks

    Klipsch RF62 or RF82? (not II version)

    in Home Theater

    Posted

    Jason, yeah I still have them. Klipsch is actuall sending me a new pair because the vinyl was peeling on my old RF62s. New speakers!!

    Anyway, back to the topic: The only reason I walked out with the 62s is because at the time, the RF82s were $300 or so more. I didnt hear the $300 difference honestly. The only reason I would step up to those is if you are running a dedicated two channel setup. I upgraded to the RF63s later and of course they are definately worth it.

    Nezff's Custom Speaker Cables

    in Alerts!

    Posted

    Hey Nez, any chance you can post a picture of a small piece of the black mesh over the Fire? That might look really cool. Much like you toned down the red in my cables. Also what is the black & blue combo you posted earlier in the thread? Those are nice as well. Thanks.

    DSC00171.jpg

    Nezff's Custom Speaker Cables

    in Alerts!

    Posted

    the black with the blue band was something I bought from hong kong. I bought like 25 or so feet and wanted to try it out. I made those for a guy that liked the color.

    I have done a ogre with the small black like yours:

    Posted Image

    Ill have to post a pic of the fire toned down. give me a few.

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