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Topic: Balanced audio

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	Balanced audio Information
		Balanced audio connections are extremely important in sound recording and production because they allow for the use of very long cables with reduced introduction of outside noise.
		The most common balanced connector is the 3-pin XLR, which is used with microphones because of its durable construction.
		Telephone lines also carry balanced audio, though this is generally now limited to the local loop.
	www.bookrags.com /wiki/Balanced_audio (676 words)

	Balanced audio: Just the facts... (Site not responding. Last check: 2007-10-22)
		Balanced audio connections are extremely important in sound recording (A recording of just the sound) and production because they allow for the use of very long cables with reduced introduction of outside noise.
		The most common balanced connector is the 3-pin XLR (additional info and facts about XLR), which is used with microphone (Device for converting sound waves into electrical energy) s because of its durable construction.
		In recording and for short cable runs in general, a compromise is necessary between the noise reduction given by balanced lines and the noise and distortion introduced by the extra circuitry they require.
	www.absoluteastronomy.com /encyclopedia/b/ba/balanced_audio.htm (278 words)

	Balanced Audio Cable
		Balanced audio cables use an extra line, and consist of a hot line (positive), cold line (negative) and earth.
		The audio signal is transmitted on both the hot and cold lines, but the voltage in the cold line is inverted so it is negative when the hot signal is positive.
		So the hot and cold lines carry two signals: A desirable audio signal which has an opposite voltage on each line, and unwanted noise which is the same on both lines.
	www.mediacollege.com /audio/balanced/cable-balanced.html (327 words)

	Balanced line - Wikipedia, the free encyclopedia
		Balanced lines can carry electrical signals farther than a unbalanced lines because any noise on the line will not be balanced and thus gets filtered out.
		To convert a signal from balanced to unbalanced requires a balun.
		Note: A balanced line may be operated in an unbalanced condition.
	en.wikipedia.org /wiki/Balanced_line (147 words)

	Balanced Line Technology
		Balanced connections in an audio system are designed to reject both external noise, from power wiring etc, and also internal crosstalk from adacent signal cables.
		Balanced connections are unlikely to provide much protection against RF ingress- both sides of the balanced input would have to demodulate the RF with exactly the same effectiveness for common-mode cancellation to occur.
		Apart from balancing requirements, a line-level input, as opposed to a microphone input, is expected to have a reasonably high impedance to allow multiple connections to a single output.
	www.dself.dsl.pipex.com /ampins/balanced/balanced.htm (7247 words)

	VIRTUAL DJ SOFTWARE - MP3 Mixing Software - BALANCED AUDIO
		Balanced audio works on the principle that two identical signals which are inverted 180° out of phase will cancel each other out.
		This is all that is required to transmit audio and is common in short cables (where noise is less of a problem) and less professional applications.
		Unbalanced audio cables are commonly associated with the 1/4" phono jack connector and the RCA connector.
	www.virtualdj.com /blog/xeon/blog2810.fr.html (708 words)

	TVTechnology - Audio By Design
		Balance by itself doesn't infer any particular type of cable topology, but in practice, to reduce susceptibility to magnetic interference, balanced audio cable is comprised of a twisted-pair for the signal.
		Balanced circuitry used to be primarily transformer-derived, but now differential active circuitry is used in most applications, although even now sometimes only a transformer will do.
		The source impedance for unbalanced audio circuits tends to be higher than unbalanced, around 1,000 to 10,000 ohms, for operating into a receive impedance of typically 50,000 ohms or higher.
	www.tvtechnology.com /features/audio_by_design/f_mary_c__gruszka.shtml (1360 words)

	Cable: Buying Guide
		Balanced lines are generally best for long cable runs due to their ability to reject induced noises.
		Balanced lines are generally much better for long cable runs due to their ability to reject induced noises.
		Unlike balanced connections the shield connection of a TS cable is required for signal to be able to pass.
	www.sweetwater.com /shop/cables/cables_buying-guide.php (2856 words)

	Balanced audio connections design
		Balanced connections does not automatically guarantee hum free connections, but well designed balanced connection avoid problems in very many cases.
		Balancing means that the inputs and outpus use different signals, but that's not all.
		Balancing also means that the cables are impedance balanced: both wires in the pair see the same impedance.
	www.epanorama.net /documents/groundloop/audiocircuit_grounding.html (539 words)

	Audio Wiring and Grounding
		In both cases the audio ground is part of an audio signal reference that is commonly connected the equipment chassis, which itself is normally referenced to earth ground.
		When chassis and audio grounds are connected to the center tap of a balanced AC isolation transformer, they are referenced to the mean AC voltage differential which is equivalent to the zero crossing point of the AC sine wave.
		The degree to which a cable is balanced from each conductor to ground, as well as it's overall impedance and capacitance, seem to be critical factors in a cable's overall performance.
	www.equitech.com /support/wiring.html (1520 words)

	Balancing Act
		There are three wires in a balanced audio connection (Figure 1B): ground, hot (or positive) and cold (or negative).
		At the receiving end of the cable (your mixer or camcorder), the audio circuit understands the correlation of the positive and negative portions of the signal to the ground wire.
		Professional microphones use balanced three-pin connectors, generally referred to as "XLR." Some microphones and mixers use a 1/4-inch connector for audio connections (also called a "phone plug" from their origin in telephone switchboards).
	www.videomaker.com /article/8079 (1451 words)

	Balanced Audio Technology
		It is suitable for people who have a basic understanding of audio cables and connectors, as well as simple wave interactions (such as how waves from different sources interfere with each other).
		Balanced audio is a method of minimising unwanted noise from interference in audio cables.
		The idea is that any interference picked up in a balanced cable is eliminated at the point where the cable plugs into a sound mixer or other equipment.
	www.mediacollege.com /audio/balanced (182 words)

	Sound Advice: Living a Balanced Life
		It's absolutely critical that they use balanced audio connections to eliminate the sea of noise trying to muscle into their signal path.
		Because balanced audio is considered a professional feature, camcorder manufacturers often only include these connections only on their upper-tier products.
		Using balanced audio is a bit more trouble and includes some added expense, but the benefits are instantaneous and easily recognizable.
	www.videomaker.com /article/9732 (1281 words)

	PS Audio - Cable Products - xStream Audio XLR - xStream Audio XLR More Info
		Balanced XLR connectors are routinely used in recording studios, pro applications, and many of the finest High-End audio video systems.
		A true balanced interconnect in the finest sense of the word, the Statement balanced is a product we would like to suggest sets an entirely new standard for the audio video world to live up to.
		Balanced cables tend to be cleaner, more dynamic and far more open sounding that a single ended cable, even the very best RCA based cables like the PS Audio xStream RCA's.
	www.psaudio.com /products/xstream_audio_xlr_moreinfo.asp (1462 words)

	Audio connector (Site not responding. Last check: 2007-10-22)
		Audio connectors are electrical connector s designed and used for audio frequencies.
		Jack plug s, including the original 6.5mm (quarter inch) jack and the more recent 3.5mm (miniature) and 2.5mm (subminiature) jacks, all in both mono and stereo versions.
		Neltron Industrial Co., Ltd. Connector, IC Socket, PGA Socket, 2 in 1 Connector, Pin Manufacture wire harness, board to board connector, wire to board connector and other electronic conectors.
	www.serebella.com /encyclopedia/article-Audio_connector.html (337 words)

	Balanced Wiring
		Balanced audio wiring was first used by the phone company, to send calls over hundreds of miles of low-quality wire without picking up too much noise.
		Audio circuits hum when they don't know what silence should sound like.
		Audio is balanced equally on these wires, flowing in a positive direction on one wire while in a negative direction on the other.
	www.dplay.com /dv/balance/balance.html (1898 words)

	Balanced audio - SRA Wiki
		Two of these are used for the signal, and the third is a ground and is used to shield the other two.
		If the power amplifiers of a public address system are located at any distance from the mixing desk, it is also normal to use balanced lines for the signal paths from the mixer to these amplifiers.
		While XLR connections are the most common balanced connector, 1/4" TRS (Tip Ring Sleeve) connectors are also commonly used.
	www.studentradio.org.uk /wiki/index.php?title=Balanced_audio&redirect=no (314 words)

	Audio Amplifiers
		The signal path is balanced throughout, with properly filtered inputs and outputs.
		ced audio input which are output as unbalanced audio, and 8 channels of unbalanced input which is electronically balanced and output.
		One or other half of the card can be used as a simple balancing or unbalancing amplifier, but a complete card is a cost-effective way of unbalancing audio prior to input to a switcher (such as the VX-8500 Series) and re-balancing it after switching, saving an entire switching level.
	www.vtx.co.uk /audio/amplifier.htm (609 words)

	Streambox: Real-Time Broadcast Video Over IP
		Our balanced audio system is based on impedance, rather than on voltage differential.
		A "differentially" balanced output signal is one where the negative output is the mirror image of the positive output.
		Make sure that your audio system recognizes the impedance method for balanced audio, or else it might treat audio signal the as unbalanced.
	www.streambox.com /support/sbt_faq_7_troubleshooting_audio.htm (389 words)

	Gaines Audio Frequently Asked Questions (FAQ) (Site not responding. Last check: 2007-10-22)
		A balanced line interface is a go-between that allows audio products which have differing input/output standards to talk to each other.
		If that balanced line is then connected to equipment with a balanced input, noise induced into the cable is greatly reduced, resulting in the highest quality transmission from your source to your destination.
		The pro audio industry has pretty much settled on a standard of making all outputs low impedance and all inputs high impedance (sometimes referred to as a bridging input), making it possible to connect any two pieces of audio equipment without giving it a second thought.
	www.gainesaudio.com /faq.htm (1728 words)

	Mic Cables - Balanced Audio Microphone cables - Mic Cables XLR mogami 2534 and Neutrik
		A Balanced quad structure is effective for high definition sound transmission as well as in canceling electromagnetic induction caused by nearby equipment such as floodlight projection, and therefore is well adapted to motion picture and TV studios.
		Balanced 1/4" male to Male XLR connectors, 3 feet long, Belden 22 gauge wire, Neutrik connectors.
		Balanced 1/4" male to Male XLR connectors, 6 feet long, Belden 22 gauge wire, Neutrik connectors.
	www.ramelectronics.net /html/mic-cables.html (971 words)

	Balanced Audio Cables from Blue Jeans Cable
		"Balanced" audio interconnects, supported on the best consumer gear, provide superior noise rejection as compared with "unbalanced" (coaxial) interconnects, because they benefit from a phenomenon known as "common mode noise rejection," where outside electrical noise affects both conductors equally and, in effect, cancels itself out.
		Most balanced cables are terminated with XLR connectors; we use the Neutrik XLR connectors with gold-plated pins.
		In addition to the Neutrik XLR connectors, we also carry 1/4 inch TRS Phone Plugs from Canare; these are intended for use where balanced lines are run in a TRS configuration--not, of course, where the 1/4 inch TRS plug is being used for stereo unbalanced audio.
	www.bluejeanscable.com /store/balancedaudio/index.htm (443 words)

	Dedicated Audio - Balanced Audio Technology VK-300X Integrated Amplifier (Site not responding. Last check: 2007-10-22)
		Balanced Audio Technology is pleased to introduce our superlative new VK-300x integrated amplifier.
		The extraordinary versatility of Balanced Audio Technology's VK-300x allows it to perform without peer and thus truly stand apart from the crowd.
		We invite you to visit your BAT audio specialist to experience this revelation for yourself.
	www.dedicatedaudio.com /inc/sdetail/6784 (634 words)

	Product Review
		I know, I know, this is a lot of money for an amplifier, but after having reviewed the phenomenal Balanced Audio VK-5i Tube Preamplifier, I just had to see if their solid state power amplifier was as good.
		The VK-500 is fully balanced, meaning that, from input to output, the signal never connects with the ground.
		Because the noise is in phase on the positive and negative conductors, while the signal is inverted (conductors 1 and 3 in the diagram on the left) with a balanced signal, the noise cancels out when the signal from the conductors is combined in the amplifier.
	www.hometheaterhifi.com /volume_5_3/balancedaudiovk500amplifier.html (1584 words)

	[No title]
		The balanced power is generated from normal AC voltage by using an isolation transformer with centre-tapped 120V output and the centre-tap of the output is grounded.
		That expensive power balancing equipment is just a 1:1 mains power isolation transformer with a center tap to ground, so that you have two legs of AC which are 180' out of phase with respect to one another (with respect to ground), so that your ground currents cancel out.
		I haven't had the need to use balanced power, but in theory it solves similar problems in a similar manner that a balanced audio signal does; namely noise cancellation.
	www.epanorama.net /documents/groundloop/balanced_power.html (1178 words)

	Stereophile: Balanced Audio Technology VK-51SE line preamplifier
		Rudyard Kipling said that "never the twain shall meet." He was speaking of East and West, but in the world of audio, his adage has most often been applied to what has been the traditional chasm between the sounds of tubes and solid-state.
		Paired with BAT's VK-D5 CD player and VK-150 monoblocks driving Wilson Audio WATT/Puppy 7s, the '51 was the heart of a system of stunning drive and power, dazzling resolution, and earthshaking dynamic range.
		The "Balanced" in Balanced Audio Technology means just that: tight-fitting, high-quality XLR jacks are the only connections provided for the five inputs and two outputs.
	www.stereophile.com /amplificationreviews/1103bat/index.html (1203 words)

	Balanced and Unbalanced Audio (Site not responding. Last check: 2007-10-22)
		This article explains the difference between balanced and unbalanced audio, when it is best to use which, and how to go about connecting a balanced output to an unbalanced input and vice versa.
		To connect an unbalanced output to a balanced input, simply connect the unbalanced signal to the "Live" side of the balanced input, and connect the Ground side of the output to both the "Return" and "Ground" of the input.
		If you regularly need to connect balanced outputs to unbalanced inputs, you may like to make up a lead with a switch in circuit to select whether the return or ground connection on the balanced output is connected to ground on the unbalanced input.
	home.btconnect.com /woodgreen/tech_tips/techtip/art6.htm (886 words)

	Why do I need balanced cables?
		It's often asked what the difference between balanced and unbalanced audio is as relates to video camera recording.
		A balanced audio system uses a means of 'mirroring' an audio signal, complete with the second signal being the exact opposite of the 'actual' audio signal.
		A balanced line uses the 'mirrored' audio that is 180 degrees out of phase, to filter/reject external interference.
	www.sundancemediagroup.com /articles/balanced_vs_unbalanced_cables.htm (691 words)

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