Mackie CR1604 - VLZ owner manual Phantom Power do & DON’T Chart, Don’T

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PHANTOM POWER DO & DON’T CHART

DO

DON’T

If you are plugging in a condenser microphone,

Worry about your other microphones as long

do verify that your microphone can be

as their output is balanced and floating.

phantom powered.

 

 

 

Ensure that the microphone’s output is low

Connect microphones or devices that do not

impedance, balanced and floating. This is

conform to the DIN 45 596 standard.

especially important for vintage ribbon

 

microphones like the RCA 44BX and 77DX.

 

 

 

Mute the sound system when turning the

Don’t connect A-B or T-system microphones

phantom power on or off, or when connect-

(another remote powering system) without

ing or disconnecting microphones. If you

suitable adaptors.

forget, the resulting loud, nasty POP may be

 

your last.

 

 

 

the DC power is applied common-mode. The audio travels via pins 2 and 3, the power trav- els between pins 2 and 3 simultaneously, and pin 1 is the ground for both audio and power.

Microphones that do not require power simply ignore the DC present between pin 2/pin 3 and pin 1. If you measure with a voltmeter between pin 2 and pin 3, you will read 0 Volts DC. This is what your dynamic microphone sees. Measur- ing between pin 2 and pin 1, or between pin 3 and pin 1, you will read the phantom power voltage, usually 48V, without a microphone connected. The dynamic microphone, as well as your balanced mixer input, ignores this voltage.

Lately, the term phantom power has been perverted to refer to any remote powering system. In the strict sense of the DIN standard, this is not true. Furthermore, microphones or transducers that claim to use this system are not compatible with the DIN standard and will almost certainly be damaged if connected into such a system. Fortunately, these systems use tip-ring-sleeve phone plugs or miniature XLR connectors and they are usually associated with instrument pickup applications2.

Phantom powering is defined in DIN standard

45 596 or IEC standard 268–15A. Your Mackie Designs mixer conforms to this standard.

2There is another remote powering system called A-B or T-system powering. It uses pins 2 and 3 to carry both power and audio. It is not compatible with dynamic microphones or phantom- powered microphones.

What works?

To be compatible in a phantom powered system, a device (microphone, preamp with a microphone-style output, or direct box) must have a balanced and floating, low-impedance output. This includes all microphones commonly used for sound reinforcement and recording, such as the Shure® SM58, SM57, Electro- Voice® RE-15, RE-16, RE-20, ND series, Beyer® M160, M500, AKG® D224, D12, D112, and many others.

If you are fortunate enough to own any tube condenser microphones, such as the AKG® C12, Neumann® U47 or U67, these microphones may be connected in a phantom powered system and will operate without regard to the presence or absence of phantom power. They will always require their external power supply (which must be plugged in and turned on).

What doesn’t work?

The list is short:

1.Microphones with unbalanced outputs.

2.Microphones with grounded center-tapped outputs. Many old ribbon microphones were supplied connected this way. Have a techni- cian lift the ground from the center tap.

3.High-impedance microphones.

4.Microphones that exhibit leakage between pin 2 or pin 3 and pin 1. These microphones will sputter and crackle when phantom power is applied and will work fine when you turn off the phantom power. Get the microphone repaired.

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Contents MIC/LINE Mixer Safety Instructions Other Nuggets of Wisdom LEVEL-SETTING ProcedureRead this Instant MixingArcane Mysteries Illuminated HOW to USE this ManualPlug for the Connectors Section IntroductionContents Hookup Diagrams Stereo EQ Video Setup Switching Positions Converting to Rackmount ModeMIC Inputs Phantom PowerPatchbay Description InterfaceDirect OUT Line InputsTrim InsertOutputs of the multitrack are then Split MonitoringAUX Send Outputs SUB Outs AUX Return InputsTape Input Phones OutputTape Output Mono Output Power ConnectionMain Insert Main OutsPhantom LED Power SwitchPower LED Phantom SwitchAssign 1-2, 3-4, L-R Clean FadeChannel Strip Description FaderDuring Normal AFL mode, the soloed SoloSolo LED OL Mute LEDConstant Loudness MutePAN Stereo SourcesAUX 1, 2, 3 LOW CUTShift PREAssign to Main MIX Output Section DescriptionVLZ MIX Architecture Subgroup FadersPhones Tape in LevelTape to Main MIX SourceRude Solo Light Ment switches post-EQLevel SET LED Solo LevelMeters vs. Reality MetersAUX Talk AUX Sends MasterMain MIX to Subs AUX RET AUX Sends SoloAUX Returns Level Effects to MonitorsReturns Solo Phns only AUX RETPlace the mixer upside-down on a dry, non- marring surface UL WarningMackie Disclaimer About JumpersCR1604-VLZ Source Mod OL Flicker CR1604-VLZ Block DiagramLOW MID High GainSpecifications Repair Service InfoTroubleshooting Aux ChorusingAssign AttenuateDBm DelayConsole CueingEqualization EchoEffects devices EQ curveGround GainGain stage Graphic EQLine level Input moduleKnee LevelPeaking Phantom powerPan, pan pot Parametric EQReturn RCA phono jack-orRCA jack or phono jackRCA phono plug RegenerationSweep EQ VolumeXLR connector Stereo⁄4 TRS Phone Plugs and Jacks XLR ConnectorsAppendix B Connections ⁄4 TS Phone Plugs and JacksSpecial Mackie Connections Switched 1⁄4 Phone JacksRCA Plugs and Jacks Unbalancing a LineTRS Send/Receive Insert Jacks Using the Send Only on an Insert JackMults and Ys Balanced Lines DON’T Phantom Power do & DON’T ChartDon’t use hardware-store light dimmers Do’s and Don’ts of Fixed InstallationsHere are some guidelines Free T-SHIRT OfferSession Date CR1604-VLZ0.5A
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