A quick insight into use of an audio signal isolator.
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If you've ever been plagued by mains hum or electrical noise finding its way into your audio system, then this little toolbox essential can save a LOT of grief.
You can become a patron of this channel at https://www.patreon.com/bigclive
If you've ever been plagued by mains hum or electrical noise finding its way into your audio system, then this little toolbox essential can save a LOT of grief.
Good
In what situation would one of these cause more noise than without it. It was severe noise created when I plugged this into my home sterio to my kenwood amp. I threw it away. I've used these in car systems with desent results but this was the 1st time in a house. It was a cheap unit but all looked well inside. It was a 4 channel unit. I was running 2 kenwood house amps at the time. Any help would be appreciated. Thanks. Good video BTW.
Hi. My TV connected to an AMP via AUX to RCA cable (This is the only way, this is an old tv and amp). The AMP always on. When I turn on the TV there is a loud Boom\Popping sound from the speakers and the AMP makes small "CLICK" sound. Even when I turn off the light swich there is a boom sound from the speakers. Can this ground loop isolator can solve this issue?
I think I know how to actually make an amp out of these things, batteries and just wire and resistors. hehehe.
Awesome thanks a lot
Very well explained. I was really wondering what this thing does and whether it could solve my issue. Turns out it can, it's just a bit chonky. My guess is that the foil is for shielding. Like the equivalent of shielded cables but on the transformers. It should ensure that no noise can be picked up by the components. It might be an overkill since it is in a metal case already but you can never be too protected from RF interference
Thank you for the tear down. The transformers in the Pyramid NS-20 are about a quarter of the size in the unit you have there.
The NS-20 has a plastic clam shell design and has just a small piece of foil for shielding. Also , the transformers are wrapped with tape before the foil. So , the foil is just shielding in the NS-20.
can you connect it backwards? im thinking since there are two transformer one could decrease the signal but the other one can restore it so it could be the same if you reverse the polarity
Ohh, I Just Got It, Was Walking Around The Store AAnd Thought About This Video And I Got The Idea WHY The Foil Is There, It Is Because The Transformers Are Not Put In At The Right Position And They Hoped That They Foil Will Help To Change The Current From One Coil To Another Better By Putting And Shorting Out The Casing Of The Transformers. ;D Thats My Guess Anyways.
Foil Is For RFI Mitigation, But Its Already In metal Casing, IDK, Weird Way To Do Things , BUT They Used Wrong Transformers For Such Aplication, They Needed To Use Smaller Transformers, Same Exact Ones That Are Used In Good Amps And They Idealy Should Be Round Ones On A Toroid , Not On A Metal, Toroid Coils That Can Carry All The Signals For Both Channels, Thats Why They Are Two Of Them I Guess.
But Yea, Totally Wrong Setup, But I Guess It Would Work In Some Way
Would you recommend one of these to run from a turntable to a mixer to get rid of the hum?
I've seen some comparisons/measurements of these devices and there's definitely different levels of quality out there. To get good transformers with extended bass response you've typically got to get something beyond the common $10-$15 devices.
I remember helping people fix "Noise issues" with their car audio systems back in the day. They always showed up with one of these devices, I never needed them, and the real issue was always one of 3 other issues…
#1. Crappy ground connections, or grounding points at different points on the car that had high impedance between them.
#2. Inferior or unshielded long RCA cable runs, that were ran next to a large, high current, power cable.
#3. A shitty head unit, OR blown ground traces on the RCA output of the head unit or EQ, because someone carelessly let the end of their RCA come into contact with the B+ on their amplifier or somewhere else in the car.
I'm in NO way saying that those noise isolaters are useless, they are very useful for mains powered equipment with ground loop issues, but they were very rarely needed in car stereo installations to cure noise issues.
I tried the Fintech filter. Sure it fixed the hum. But it added so much distortion for low frequency sounds that it made it unusable for me 🙁