Ground Loop - Revision history

ST: /* Related Discussions */

2019-04-07T13:31:28Z

Related Discussions

← Older revision		Revision as of 13:31, 7 April 2019
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	* [https://www.bosepro.community/g/portable/topic/grounded-plug Grounded Plug]		* [https://www.bosepro.community/g/portable/topic/grounded-plug Grounded Plug]
	* [https://web.archive.org/web/20111228084345/http://www.radialeng.com/di-prodi-prod2-development.htm Ground Loops] at Radial Engineering.		* [https://web.archive.org/web/20111228084345/http://www.radialeng.com/di-prodi-prod2-development.htm Ground Loops] at Radial Engineering.
	* [https://www.bosepro.community/g/portable/topic/laptop-playback-noises#6741094332 Laptop Playback Noises]~~, [http://forums~~.~~us.dell.com/supportforums/board/message?board.id=insp_audio&message.id=18216 Dell Audio FAQ],~~		* [https://www.bosepro.community/g/portable/topic/laptop-playback-noises#6741094332 Laptop Playback Noises].
	* [https://www.bosepro.community/g/portable/topic/magnetic-pick-up-noise Magnetic Pick-up Noise]		* [https://www.bosepro.community/g/portable/topic/magnetic-pick-up-noise Magnetic Pick-up Noise]

ST: /* Related Discussions */

2019-04-07T13:28:18Z

Related Discussions

← Older revision		Revision as of 13:28, 7 April 2019
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	* [https://www.bosepro.community/g/portable/topic/grounded-plug Grounded Plug]		* [https://www.bosepro.community/g/portable/topic/grounded-plug Grounded Plug]
	* [https://web.archive.org/web/20111228084345/http://www.radialeng.com/di-prodi-prod2-development.htm Ground Loops] at Radial Engineering.		* [https://web.archive.org/web/20111228084345/http://www.radialeng.com/di-prodi-prod2-development.htm Ground Loops] at Radial Engineering.
	* [https://www.bosepro.community/g/portable/topic/laptop-playback-noises#6741094332 Laptop Playback Noises], [http://forums.us.dell.com/supportforums/board/message?board.id=insp_audio&message.id=18216 Dell Audio FAQ], ~~[http://forums.us.dell.com/supportforums/board/message?board.id=insp_audio&message.id=23486 Dell Ground Loop Problem]~~		* [https://www.bosepro.community/g/portable/topic/laptop-playback-noises#6741094332 Laptop Playback Noises], [http://forums.us.dell.com/supportforums/board/message?board.id=insp_audio&message.id=18216 Dell Audio FAQ],
	* [~~http~~://~~bose~~.~~infopop~~.~~cc/eve/forums/a/tpc~~/f/~~6366055944~~/m/~~7551083734?r=7551083734~~ Magnetic Pick-up Noise]		* [https://www.bosepro.community/g/portable/topic/magnetic-pick-up-noise Magnetic Pick-up Noise]

	Download: [[Media:Sound System Interconnection.pdf\|Sound System Interconnection.pdf]]		Download: [[Media:Sound System Interconnection.pdf\|Sound System Interconnection.pdf]]

ST: /* Related Discussions */

2019-04-07T13:24:57Z

Related Discussions

← Older revision		Revision as of 13:24, 7 April 2019
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	=== Related Discussions ===		=== Related Discussions ===
	* [~~http~~://~~bose~~.~~infopop~~.cc/~~eve~~/~~forums~~/a/~~tpc/f/6806048934/m/1171031006~~ Two Prong Cheater Plub for AC Power]		* [https://www.bosepro.community/g/portable/topic/two-prong-cheater-plugs-for-ac-power Two Prong Cheater Plub for AC Power]
	* [~~http~~://~~bose~~.~~infopop~~.cc/~~eve~~/~~forums~~/a/~~tpc/f/3976055944/m/9491015302?r=9491015302~~ Grounded Plug]		* [https://www.bosepro.community/g/portable/topic/grounded-plug Grounded Plug]
	* [http://www.radialeng.com/di-prodi-prod2-development.htm Ground Loops] at Radial Engineering.		* [https://web.archive.org/web/20111228084345/http://www.radialeng.com/di-prodi-prod2-development.htm Ground Loops] at Radial Engineering.
	* [~~http~~://~~bose~~.~~infopop~~.cc/~~eve~~/~~forums~~/a/~~tpc/f/6366055944/m/8671042332?r=6741094332~~#6741094332 Laptop Playback Noises], [http://forums.us.dell.com/supportforums/board/message?board.id=insp_audio&message.id=18216 Dell Audio FAQ], [http://forums.us.dell.com/supportforums/board/message?board.id=insp_audio&message.id=23486 Dell Ground Loop Problem]		* [https://www.bosepro.community/g/portable/topic/laptop-playback-noises#6741094332 Laptop Playback Noises], [http://forums.us.dell.com/supportforums/board/message?board.id=insp_audio&message.id=18216 Dell Audio FAQ], [http://forums.us.dell.com/supportforums/board/message?board.id=insp_audio&message.id=23486 Dell Ground Loop Problem]
	* [http://bose.infopop.cc/eve/forums/a/tpc/f/6366055944/m/7551083734?r=7551083734 Magnetic Pick-up Noise]		* [http://bose.infopop.cc/eve/forums/a/tpc/f/6366055944/m/7551083734?r=7551083734 Magnetic Pick-up Noise]

ST: /* Diagnosing / Troubleshooting */

2019-04-07T13:22:08Z

Diagnosing / Troubleshooting

← Older revision		Revision as of 13:22, 7 April 2019
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	Dave		Dave

	Dave also recommended reading [http://www.radialeng.com/di-prodi-prod2-development.htm Ground Loops] at Radial Engineering.		Dave also recommended reading [https://web.archive.org/web/20111228084345/http://www.radialeng.com/di-prodi-prod2-development.htm Ground Loops] at Radial Engineering.

	== Ground Loops (article excerpt) ==		== Ground Loops (article excerpt) ==

ST at 07:29, 7 December 2018

2018-12-07T07:29:09Z

← Older revision		Revision as of 07:29, 7 December 2018
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			<noinclude>
	<table><tr>		<table><tr>
	<td valign="top" width="250">__TOC__</td>		<td valign="top" width="250">__TOC__</td>
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	</td>		</td>
	</tr></table>		</tr></table>
			</noinclude>
			<includeonly>
			[[Image:Cheaterplug.png\|right\|cheater plug]]
			'''Safety Note'''

			NEVER use a cheater plug or cut the ground plug off an ac power cord.

			From the Owners Manual
			: Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wider blade or third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
			</includeonly>

	== Diagnosing / Troubleshooting ==		== Diagnosing / Troubleshooting ==

ST: /* Related Discussions */

2014-04-27T17:16:31Z

Related Discussions

← Older revision		Revision as of 17:16, 27 April 2014
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	* [http://bose.infopop.cc/eve/forums/a/tpc/f/6366055944/m/7551083734?r=7551083734 Magnetic Pick-up Noise]		* [http://bose.infopop.cc/eve/forums/a/tpc/f/6366055944/m/7551083734?r=7551083734 Magnetic Pick-up Noise]

	Download: [[Media::Sound System Interconnection.pdf\|:Sound System Interconnection.pdf]]		Download: [[Media:Sound System Interconnection.pdf\|Sound System Interconnection.pdf]]

	----		----

ST: /* Related Discussions */

2014-04-27T17:15:52Z

Related Discussions

← Older revision		Revision as of 17:15, 27 April 2014
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	* [http://bose.infopop.cc/eve/forums/a/tpc/f/6366055944/m/7551083734?r=7551083734 Magnetic Pick-up Noise]		* [http://bose.infopop.cc/eve/forums/a/tpc/f/6366055944/m/7551083734?r=7551083734 Magnetic Pick-up Noise]

			Download: [[Media::Sound System Interconnection.pdf\|:Sound System Interconnection.pdf]]

	----		----

ST: /* Related Discussions */

2010-10-24T20:55:49Z

Related Discussions

← Older revision		Revision as of 20:55, 24 October 2010
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	=== Related Discussions ===		=== Related Discussions ===
			* [http://bose.infopop.cc/eve/forums/a/tpc/f/6806048934/m/1171031006 Two Prong Cheater Plub for AC Power]
	* [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/9491015302?r=9491015302 Grounded Plug]		* [http://bose.infopop.cc/eve/forums/a/tpc/f/3976055944/m/9491015302?r=9491015302 Grounded Plug]
	* [http://www.radialeng.com/di-prodi-prod2-development.htm Ground Loops] at Radial Engineering.		* [http://www.radialeng.com/di-prodi-prod2-development.htm Ground Loops] at Radial Engineering.

ST: Reverted edits by Soniatrevor (Talk); changed back to last version by Velhart

2010-07-09T06:44:17Z

Reverted edits by Soniatrevor (Talk); changed back to last version by Velhart

← Older revision		Revision as of 06:44, 9 July 2010
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	This is an excerpt of an article www.rane.com [http://www.rane.com/note110.html Sound System Interconnection] <ref>Excerpt of Article at www.rane.com [http://www.rane.com/note110.html Sound System Interconnection]</ref>		This is an excerpt of an article www.rane.com [http://www.rane.com/note110.html Sound System Interconnection] <ref>Excerpt of Article at www.rane.com [http://www.rane.com/note110.html Sound System Interconnection]</ref>

	Almost all cases of noise can be traced directly to ground loops, grounding or lack thereof. It is important to understand the mechanism that causes grounding noise in order to effectively eliminate it. Each component of a sound system produces its own ground internally. This ground is usually called the audio signal ground. Connecting devices together with the interconnecting cables can tie the signal grounds of the two units together in one place through the conductors in the cable. Ground loops occur when the grounds of the two units are also tied together in another place: via the third wire in the line cord, by tying the metal chassis together through the rack rails, etc. These situations create a circuit through which current may flow in a closed "loop" from one unit's ground out to a second unit and back to the first. It is not simply the presence of this current that creates the hum -- it is when this current flows through a unit's audio signal ground that creates the hum. In fact, even without a ground loop, a little noise current always flows through every interconnecting ~~[http://www.cabletiesandmore.com/cableties.php~~ cable ~~ties]~~(i.e., it is impossible to eliminate these currents entirely). The mere presence of this ground loop current is no cause for alarm if your system uses properly implemented and completely balanced interconnects, which are excellent at rejecting ground loop and other noise currents. Balanced interconnect was developed to be immune to these noise currents, which can never be entirely eliminated. What makes a ground loop current annoying is when the audio signal is affected. Unfortunately, many manufacturers of balanced audio equipment design the internal grounding system improperly, thus creating balanced equipment that is not immune to the cabling's noise currents. This is one reason for the bad reputation sometimes given to balanced interconnect.		Almost all cases of noise can be traced directly to ground loops, grounding or lack thereof. It is important to understand the mechanism that causes grounding noise in order to effectively eliminate it. Each component of a sound system produces its own ground internally. This ground is usually called the audio signal ground. Connecting devices together with the interconnecting cables can tie the signal grounds of the two units together in one place through the conductors in the cable. Ground loops occur when the grounds of the two units are also tied together in another place: via the third wire in the line cord, by tying the metal chassis together through the rack rails, etc. These situations create a circuit through which current may flow in a closed "loop" from one unit's ground out to a second unit and back to the first. It is not simply the presence of this current that creates the hum -- it is when this current flows through a unit's audio signal ground that creates the hum. In fact, even without a ground loop, a little noise current always flows through every interconnecting cable (i.e., it is impossible to eliminate these currents entirely). The mere presence of this ground loop current is no cause for alarm if your system uses properly implemented and completely balanced interconnects, which are excellent at rejecting ground loop and other noise currents. Balanced interconnect was developed to be immune to these noise currents, which can never be entirely eliminated. What makes a ground loop current annoying is when the audio signal is affected. Unfortunately, many manufacturers of balanced audio equipment design the internal grounding system improperly, thus creating balanced equipment that is not immune to the cabling's noise currents. This is one reason for the bad reputation sometimes given to balanced interconnect.

	A second reason for balanced interconnect's bad reputation comes from those who think connecting unbalanced equipment into "superior" balanced equipment should improve things. Sorry. Balanced interconnect is not compatible with unbalanced. The small physical nature and short cable runs of completely unbalanced systems (home audio) also contain these ground loop noise currents. However, the currents in unbalanced systems never get large enough to affect the audio to the point where it is a nuisance. Mixing balanced and unbalanced equipment, however, is an entirely different story, since balanced and unbalanced interconnect are truly not compatible. The rest of this note shows several recommended implementations for all of these interconnection schemes.		A second reason for balanced interconnect's bad reputation comes from those who think connecting unbalanced equipment into "superior" balanced equipment should improve things. Sorry. Balanced interconnect is not compatible with unbalanced. The small physical nature and short cable runs of completely unbalanced systems (home audio) also contain these ground loop noise currents. However, the currents in unbalanced systems never get large enough to affect the audio to the point where it is a nuisance. Mixing balanced and unbalanced equipment, however, is an entirely different story, since balanced and unbalanced interconnect are truly not compatible. The rest of this note shows several recommended implementations for all of these interconnection schemes.

Soniatrevor: /* Ground Loops (article excerpt) */

2010-07-07T12:45:40Z

Ground Loops (article excerpt)

← Older revision		Revision as of 12:45, 7 July 2010
Line 39:		Line 39:
	This is an excerpt of an article www.rane.com [http://www.rane.com/note110.html Sound System Interconnection] <ref>Excerpt of Article at www.rane.com [http://www.rane.com/note110.html Sound System Interconnection]</ref>		This is an excerpt of an article www.rane.com [http://www.rane.com/note110.html Sound System Interconnection] <ref>Excerpt of Article at www.rane.com [http://www.rane.com/note110.html Sound System Interconnection]</ref>

	Almost all cases of noise can be traced directly to ground loops, grounding or lack thereof. It is important to understand the mechanism that causes grounding noise in order to effectively eliminate it. Each component of a sound system produces its own ground internally. This ground is usually called the audio signal ground. Connecting devices together with the interconnecting cables can tie the signal grounds of the two units together in one place through the conductors in the cable. Ground loops occur when the grounds of the two units are also tied together in another place: via the third wire in the line cord, by tying the metal chassis together through the rack rails, etc. These situations create a circuit through which current may flow in a closed "loop" from one unit's ground out to a second unit and back to the first. It is not simply the presence of this current that creates the hum -- it is when this current flows through a unit's audio signal ground that creates the hum. In fact, even without a ground loop, a little noise current always flows through every interconnecting cable (i.e., it is impossible to eliminate these currents entirely). The mere presence of this ground loop current is no cause for alarm if your system uses properly implemented and completely balanced interconnects, which are excellent at rejecting ground loop and other noise currents. Balanced interconnect was developed to be immune to these noise currents, which can never be entirely eliminated. What makes a ground loop current annoying is when the audio signal is affected. Unfortunately, many manufacturers of balanced audio equipment design the internal grounding system improperly, thus creating balanced equipment that is not immune to the cabling's noise currents. This is one reason for the bad reputation sometimes given to balanced interconnect.		Almost all cases of noise can be traced directly to ground loops, grounding or lack thereof. It is important to understand the mechanism that causes grounding noise in order to effectively eliminate it. Each component of a sound system produces its own ground internally. This ground is usually called the audio signal ground. Connecting devices together with the interconnecting cables can tie the signal grounds of the two units together in one place through the conductors in the cable. Ground loops occur when the grounds of the two units are also tied together in another place: via the third wire in the line cord, by tying the metal chassis together through the rack rails, etc. These situations create a circuit through which current may flow in a closed "loop" from one unit's ground out to a second unit and back to the first. It is not simply the presence of this current that creates the hum -- it is when this current flows through a unit's audio signal ground that creates the hum. In fact, even without a ground loop, a little noise current always flows through every interconnecting [http://www.cabletiesandmore.com/cableties.php cable ties](i.e., it is impossible to eliminate these currents entirely). The mere presence of this ground loop current is no cause for alarm if your system uses properly implemented and completely balanced interconnects, which are excellent at rejecting ground loop and other noise currents. Balanced interconnect was developed to be immune to these noise currents, which can never be entirely eliminated. What makes a ground loop current annoying is when the audio signal is affected. Unfortunately, many manufacturers of balanced audio equipment design the internal grounding system improperly, thus creating balanced equipment that is not immune to the cabling's noise currents. This is one reason for the bad reputation sometimes given to balanced interconnect.

	A second reason for balanced interconnect's bad reputation comes from those who think connecting unbalanced equipment into "superior" balanced equipment should improve things. Sorry. Balanced interconnect is not compatible with unbalanced. The small physical nature and short cable runs of completely unbalanced systems (home audio) also contain these ground loop noise currents. However, the currents in unbalanced systems never get large enough to affect the audio to the point where it is a nuisance. Mixing balanced and unbalanced equipment, however, is an entirely different story, since balanced and unbalanced interconnect are truly not compatible. The rest of this note shows several recommended implementations for all of these interconnection schemes.		A second reason for balanced interconnect's bad reputation comes from those who think connecting unbalanced equipment into "superior" balanced equipment should improve things. Sorry. Balanced interconnect is not compatible with unbalanced. The small physical nature and short cable runs of completely unbalanced systems (home audio) also contain these ground loop noise currents. However, the currents in unbalanced systems never get large enough to affect the audio to the point where it is a nuisance. Mixing balanced and unbalanced equipment, however, is an entirely different story, since balanced and unbalanced interconnect are truly not compatible. The rest of this note shows several recommended implementations for all of these interconnection schemes.