|
|
 |
|
The following page was printed from RemoteCentral.com:
| Topic: | Ground loop noise This thread has 7 replies. Displaying all posts. |
|
| Post 1 made on Monday September 30, 2024 at 17:57 |
PSS Select Member |
Joined:
Posts: | December 2002
1,541 |
|
|
I have a system that I can't get rid of a low level noise/ hum
Sony 3000ES AVR with front pre outs going to a Crown amp
Apple TV> HDMI to the Sony
Remote HDMI wall connection (AV Pro Edge)
Epson Home Cinema 3800 (connected with AV Pro Edge AC-EX444-T2 Extender)
The Sony power cord only has two prongs and the Crown amp has three (ground)
I disconnected all sources and connections from the Sony and only the L/R preouts going to the Crown, still has it.
I also tried an inline RCA ground loop isolator from Amazon (Don't shame me) that didn't work.
The only way it stops is using a 3/2 ground breaker adapter. I know this isn't the way to leave it, so I'm wondering what else should I try. Higher quality RCA ground loop isolator? or what else?
|
|
| Post 2 made on Monday September 30, 2024 at 23:37 |
buzz Super Member |
Joined:
Posts: | May 2003
4,434 |
|
|
I always use Jensen. They ain’t the cheapest, but I know that the issue will be gone. I took over a large installation that had stuff scattered all over the house, multiple VCR’s, TV’s, disc players, B&O receivers, Yamaha receivers, and hidden stuff that I don’t think that I have yet discovered. There were ground loops everywhere. I could see that someone had been struggling to eliminate the ground loops. They were using cheap isolators, and no discipline. I installed a few Jensen’s, kept my discipline, and the issue(s) were gone.Make sure that you don’t have an unexpected chassis ground. CATV is a trouble maker.
|
|
| Post 3 made on Tuesday October 1, 2024 at 07:00 |
Gman Select Member |
Joined:
Posts: | February 2009
2,258 |
|
|
On September 30, 2024 at 23:37, buzz said...
I always use Jensen. They ain’t the cheapest, but I know that the issue will be gone. I took over a large installation that had stuff scattered all over the house, multiple VCR’s, TV’s, disc players, B&O receivers, Yamaha receivers, and hidden stuff that I don’t think that I have yet discovered. There were ground loops everywhere. I could see that someone had been struggling to eliminate the ground loops. They were using cheap isolators, and no discipline. I installed a few Jensen’s, kept my discipline, and the issue(s) were gone.Make sure that you don’t have an unexpected chassis ground. CATV is a trouble maker. +1
|
|
|
| Post 4 made on Tuesday October 1, 2024 at 09:22 |
highfigh Loyal Member |
Joined:
Posts: | September 2004
8,382 |
|
|
On September 30, 2024 at 17:57, PSS said...
I have a system that I can't get rid of a low level noise/ hum
Sony 3000ES AVR with front pre outs going to a Crown amp
Apple TV> HDMI to the Sony
Remote HDMI wall connection (AV Pro Edge)
Epson Home Cinema 3800 (connected with AV Pro Edge AC-EX444-T2 Extender)
The Sony power cord only has two prongs and the Crown amp has three (ground)
I disconnected all sources and connections from the Sony and only the L/R preouts going to the Crown, still has it.
I also tried an inline RCA ground loop isolator from Amazon (Don't shame me) that didn't work.
The only way it stops is using a 3/2 ground breaker adapter. I know this isn't the way to leave it, so I'm wondering what else should I try. Higher quality RCA ground loop isolator? or what else? OK, so the hum stops when you disconnect the Crown amp- what model and input type? If you're using RCA to XLR, lift the connection to Pin 1, not the electrical ground. If it stops, you're done. If the amp uses the screw-type or Phoenix connections, lift the audio ground wire on that. Your power amp and AVR are powered by the same outlet and on the same circuit, right?
|
My mechanic told me, "I couldn't repair your brakes, so I made your horn louder." |
|
| Post 5 made on Tuesday October 1, 2024 at 09:30 |
Fred Harding Super Member |
Joined:
Posts: | October 2001
3,470 |
|
|
Which Crown amp?
|
On the West Coast of Wisconsin |
|
| OP | Post 6 made on Thursday October 3, 2024 at 10:59 |
PSS Select Member |
Joined:
Posts: | December 2002
1,541 |
|
|
On October 1, 2024 at 09:22, highfigh said...
OK, so the hum stops when you disconnect the Crown amp- what model and input type? If you're using RCA to XLR, lift the connection to Pin 1, not the electrical ground. If it stops, you're done. If the amp uses the screw-type or Phoenix connections, lift the audio ground wire on that.
Your power amp and AVR are powered by the same outlet and on the same circuit, right? I don't know what type of connection between the Croan and Sony- Have to get back to see Yes- they are both plugged into the same outlet/ circuit
|
|
| OP | Post 7 made on Thursday October 3, 2024 at 11:00 |
PSS Select Member |
Joined:
Posts: | December 2002
1,541 |
|
|
On October 1, 2024 at 09:30, Fred Harding said...
Which Crown amp? I need to get back the site and check (job notes doesn't show model...)
|
|
| Post 8 made on Friday October 4, 2024 at 10:01 |
highfigh Loyal Member |
Joined:
Posts: | September 2004
8,382 |
|
|
On October 3, 2024 at 11:00, PSS said...
I need to get back the site and check (job notes doesn't show model...) Is anyone working or living onsite? Can they send a photo of the front panel?
|
My mechanic told me, "I couldn't repair your brakes, so I made your horn louder." |
|
 |
Before you can reply to a message... |
You must first register for a Remote Central user account - it's fast and free! Or, if you already have an account, please login now. |
Please read the following: Unsolicited commercial advertisements are absolutely not permitted on this forum. Other private buy & sell messages should be posted to our Marketplace. For information on how to advertise your service or product click here. Remote Central reserves the right to remove or modify any post that is deemed inappropriate.
|
|
