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  1. Can we consider that ethernet or RS-232 (RS-485) networks have no ground connection between the two ends of each cable?

    Remotes | Cables | Accessories | Tweaks
    This is for a huge home theater. I have a power transformer that converts 380VAC between two legs of a 3-phase power system down to 230VAC, with a center-tap of the secondary being our "neutral" for this secondary. (FYI, there are three such transformers, connected between phases A and B; B and...
  2. Ground loop isolator

    System Setup and Connection
    So I picked up one of these, and installed it. Can anyone figure out why it made my 60hz hum louder? Like 10db louder. Could the ends be installed on the wrong side? Sent from my iPhone using Tapatalk
  3. Using REW for Ground Plane Testing

    REW Forum
    I've done all the normal searches, but could anything relating to this query. I have used REW (several years ago) to set up and fine tune my Home Theatre with great success. I am currently building a pair of folded horn subs for my daughter's band. Once completed, I want to test them. I have a...
  4. Ground Loops

    System Setup and Connection
    Well I have found that I have a ground loop problem coming from my coax cable. I have tried to ground the coax at the point it enters the home but that didn't work. I have been searching the internet for a CATV Isolator but I haven't been able to find one that is over 1ghz and I take it from...
  5. Ground sound

    DCN23....Was this 5 posts???
  6. Ground loop??

    REW Forum
    Hi again! Prior to start my measurements I've seen this looking at RTA in silence. As you can see there's a peak around 50Hz and I'm in Spain so I guess it's a ground loop causing some kind of hum noise. Will this affect the measurements at all?? Should I try to solve it someway before going on...
  7. Dayton UMM-6, ground loop hum?

    REW Forum
    Hi I've just got the Dayton Audio UMM-6 microphone and got the REW installed on the laptop. My issue is that when I connect the laptop to the Receiver (Denon X4000) through Aux, there is an audible hum. Increase in volume makes it louder. Ive tried connecting my phone through the same cable...
  8. Another Ground Loop Thread..Please Help

    System Setup and Connection
    Ok here's the situation. Getting hum through all my speakers. I troubleshooted and it's the hdmi cables coming from htpc, oppo and projector because they have a ground on the power plugs. The xbox and roku are fine, no ground. If I disconnect the plug from the oppo for example and leave...
  9. The Frozen Ground - Blu-ray Review

    Official DVD and Blu-ray Reviews
    http://www.hometheatershack.com/news/FGC.jpg Title: The Frozen Ground Movie: :4stars: Video: :4stars: Audio: :4stars: Extras: :3.5stars: HTS Overall Score:79 http://www.hometheatershack.com/news/FG1.jpgSummary Robert Hansen (John Cusack) is a monster. He’s repulsive...
  10. Cable TV ground loop noise

    System Setup and Connection
    Hi all, I decided to hook up my cable box to my AVR to watch the UFC PPV. But doing so added noise to the entire system. I know it's caused by my cable provider (RG6 wire). The two solutions I know about are to remove a ground tab from the cable box or the AVR units power cables or to use an...
  11. HDMI ground loops?

    System Setup and Connection
    Hi, I have ground loop hum and am busy checking potential loops. One thing I see is six HDMI cables connected to my AVR (4 sources, 2 displays). Three of these six devices are mains-earthed. Which says to me there are 3 redundant earth loops I would like to isolate. If these were all analogue...
  12. Cable ground loop HELP.

    General Service and Technical Information
    Ok, I had a very bad ground loop hum on my cable that I just had installed in my HT room. After doing some reading here at the Shack I discovered the cable guy left the ground wire off the new splitter. I reconnected it and 80% of the hum is gone. So the question is how do I get the last little...
  13. Fix for ground loop issues

    DIY Subwoofers - General Discussion
    I posted this in the diy subwoofer section, because I first began having trouble with ground loops after my pro amp/sub installation. For anyone out there who has ground loops associated with their cable or satellite, I have found an easy fix that I haven't seen posted elsewhere. The system...
  14. GROUND SCREW -- What is it for and is it important?

    System Setup and Connection
    I recently got a Monster HDP 1800 PowerCenter: IMAGE: http://i658.photobucket.com/albums/uu308/kellogg9/MPHT16.jpg On the back there is a "ground screw" (its the top-right gold-colored object in the lower image). The unit also has a "Circuit Breaker" on the back. Can someone tell me: 1...
  15. Owlfan Ground Up Theater

    Home Theater Design and Construction
    I'm talking to two custom home builders about a new home and I have this preliminary design back from one of them. Some basic home/theater plans: One story on concrete slab. Brick or possibly stucco exterior. Located in Oklahoma where it gets hot in the summer (100+) and cold in the winter...
  16. Help with Ground Up Theater Design

    Home Theater Design and Construction
    I'm looking for some help from some of the guys on the forum. I will be building a theater in basement. I'm looking for guidance with room size for the best acoustic performance. The maximum space than can be used is 20 x 34 but i would like to keep it much smaller maybe around 16 x 20. I'm...
  17. EP2500 ground loop and volume issues

    Subwoofer Amps | High Pass Filters
    I am FIIIIIINALLY getting close to finishing my Dual ED 19ov.02 DIT subs... I am hooking them up before assembling in fully. The concern is that I got a bad ground loop/hum until I connected them through my reckhorn b1. Once I put it through that I can get decent volumw with only a slight hum if...
  18. Where does the ground cable from my turntable go?

    AV Home Theater
    Hey guys I want to buy a Technics SL1200MK2. I have a phono preamp from TheSource which has two sets of RCA jacks, one for in and one for out. That's all that's there. Now, I want to buy the turntable, and the cartridge I have picked out, but I am wondering where the ground cable goes from the...
  19. absolute ground 0 in Hz

    DIY Subwoofers - General Discussion
    So 14Hz is minimum for LLT, 8Hz is "Bottom C", and I've heard 5Hz is a lot of DIY'ers dream or goal. At some point, there has to be a cut off... 4Hz is after 8 and may still be felt?, 2Hz, 1Hz... 1Hz, but then it is infinite... 1/4, 1/8... So if there was no limit... you won the $350 million...
  20. My first system... from the ground up

    Home Theater System Recommendations
    Hi guys, i am Chris. i am new to the forum here, ran across it the other day chasing down some HT systems for christmas. I am 15, and really have no source of income other than my birthday and christmas (that first job still eludes me). my purpose for a home theater is not so much for movies...