IEC 61938 PDF

IEC Standard | Audio, video and audiovisual systems – Interconnections and matching values – Preferred matching values of. However it might be better to be aware of such defects rather than oblivious of them. Parallel powering is covered by section of the. IEC standards. IEC Multimedia systems – Guide to the recommended characteristics of analogue interfaces to achieve interoperability.

Author: Gajin Domuro
Country: Serbia
Language: English (Spanish)
Genre: Finance
Published (Last): 17 January 2005
Pages: 428
PDF File Size: 19.73 Mb
ePub File Size: 12.10 Mb
ISBN: 523-4-93717-991-1
Downloads: 78220
Price: Free* [*Free Regsitration Required]
Uploader: Shakadal

Phantom power is the right amount of power where needed. This supply can furnish up to mA to digital microphones.

RDL Dual Microphone Phantom Adapter – 48 V

When sound hits the capsule, the variation between the space produces an electrical signal which represents ief sound detected.

This is in contrast to microphones with vacuum-tube circuitry, most of which require special, multi-conductor cables. If it is desired to disconnect phantom power from one channel only, this can be done by using a 1: The mics are similar—a mic with an XLR connector expects phantom power, a mic with two uec, or a simple jec connector, probably expects bias power.

Phantom powerin the context of professional audio equipmentis DC electric power transmitted through microphone cables to operate microphones ic contain active electronic circuitry.

This document provides support for the currently recommended characteristics of analog multimedia interfaces to achieve compatibility between devices from different manufacturers. The IEC Standard defines volt, volt, and volt phantom powering. This standard is not included in any packages.


Phantom powering consists of a phantom circuit where direct current is applied equally through the two signal lines of a balanced audio connector in modern equipment, both pins 2 and 3 of an XLR connector.

Digital interface handbook third edition. The good news is it will not damage dynamic microphones. You may delete a document from your Alert Profile at any time. Recommendations for interfaces for devices used in vehicles and for uec video interfaces for radio or similar devices are not provided. Acoustic guitarists often encounter bias-powered mics as part of dual-source pickup systems. We have no amendments or corrections for this standard.

RDL STMPA48 – Dual Microphone Phantom Adapter – 48 V – Herman ProAV

Ribbon mics usually used only in studios can be damaged by phantom power if a cable is mis-wired. This is not the same as phantom power which sends power down two lines.

There is a common belief that connecting a dynamic or ribbon microphone to 6138 phantom-powered input will damage it. Most modern mixers provide 48 volts, which has become so common that many people assume that phantom power automatically means 48 iex.

One such approach is known as bias power—also called plug-in-power. A balanced signal consists only of the differences in voltage between two signal lines; phantom powering places the same DC voltage on both signal lines of a balanced connection.


Please first log in with a ic email before subscribing to alerts. It uses a two-wire system, unlike the balanced XLR three-wire system. These same cables will also be used to pass the audio back from the microphone.

Views Read Edit View history. Most mics require only a few milliamps of current, which any modern mixer should easily support, but some mics—as well as phantom powered preamps—may have higher current demands.

There must always be a DC current path between pin 1 of the microphone and the negative side of the 48 volt supply, if power is to reach the microphone’s electronics. For unintentional voltages in power distribution systems, see stray voltage. This is in marked contrast to another, slightly earlier method of powering known as “parallel powering” or “T-powering” from the German term Tonaderspeisungin which DC was overlaid directly onto the signal in differential mode.

Proceed to Checkout Continue Shopping.

Everything You Need to Know About Microphone Phantom Power

Has kec power damaged this keyboard? Although 12 V and 48 V systems are still in use, 24 V systems are preferred for new developments. This Indian Standard which is identical with lEC Baggs ParaDI, for exampleand these may not work with lower voltages.

Some condenser microphones can be powered with a 1.