Part 3 — INPUT/OUTPUTPOD

 

 

 

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SENSITIVITY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

•

 

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•

 

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ADD 8dB FOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIC INPUTS

 

 

 

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–40

 

 

 

 

U 16

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U 6

 

U 5

 

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MAINS

 

PHANTOM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+48V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNBALANCED LINE INPUTS

 

 

 

 

 

 

 

 

 

 

 

BALANCED/UNBALANCED LINE INPUTS

 

 

 

 

 

BAL MAIN OUT

MONO

 

AUX OUTPUTS

 

ALT 3/4 OUT BUSS INSERT

 

 

 

AUX RETURNS

 

 

CHANNEL ACCESS

TIP=OUT

RING=IN

 

 

 

 

 

LOW Z BALANCED MICROPHONE INPUTS

 

 

 

 

 

 

 

 

 

 

 

 

 

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1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEFT

 

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LEFT

 

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R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RIGHT

MONITOR

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RIGHT

 

 

 

 

 

 

 

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OUTPUTS/SENDS RETURNS/INSERTS

INPUTS

INPUT

OUTPUT

POD

19INPUT SENSITIVITY CONTROLS

The first set of items on our tour are the sensitivity controls for the 16 input channels. These knobs adjust the input sensitivity of the mic and line inputs so signals from the outside world are brought into the mixer at optimum internal operating levels. INPUT SENSITIVITY controls for channels 1–6 have up to 40dB of gain for line inputs and 50dB for XLR inputs; controls for channels 7–16 have 25dB of gain. Note that all SENSITIVITY controls are marked with a –10 setting. This is the amount of gain needed to raise –10dBv operating level equipment up to professional +4dB levels.

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U

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9

PHANTOM

•When using microphone XLR input jacks, you will get 10dB more gain than what the SENSITIVITY trim marking indicates.

21PHANTOM POWER SWITCH

What is Phantom Power? No, it’s not the arch enemy of Captain America or anything like that. Most modern professional condenser mics are equipped for Phantom Power, which lets the mixer send DC power to the mic’s electronics over the same wires that carry audio (hence “phantom” since the DC voltage is “unseen” by dynamic and ribbon mics which don’t need external power and are unaffected by it anyway).

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SENSITIVITY

 

19

 

 

•

 

•

 

•

 

•

 

•

 

•

ADD 8dB FOR

 

 

 

 

 

 

 

 

MIC INPUTS

+4

–40

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U 8

 

U 7

 

U 6

 

U 5

 

U 4

 

U 3

 

U 2

 

U 1

 

 

 

 

UNBALANCED LINE INPUTS

 

 

 

 

BALANCED/UNBALANCED LINE INPUTS

 

 

 

 

 

 

 

 

 

 

LOW Z BALANCED MICROPHONE INPUTS

 

 

 

 

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2

1

20MICROPHONE INPUTS (Channels1–6)

We use true phantom-powered, balanced inputs just like the big, studio mega-consoles for the same reason they do: This kind of circuit is excellent at rejecting hum and noise. You can plug in any kind of professional microphone that has a standard “XLR-type male” mic connector, an impedance of between 50 ohms and 600 ohms.

If you wire your own male XLR’s, connect them like this:

Pin 2= Positive (+ or hot)Pin 3 = Negative ( – or cold)Pin 1 = Shield (ground)

Basically, Inputs 1–6 will handle any kind of mic level you can toss at them. Professional ribbon, dynamic and condenser mics will all sound excellent through these inputs — especially if you follow the Level Setting instructions on page 19. Lower-cost electret-type, unbalanced mics should be plugged into Inputs 7–16 but will require additional gain and thus not be as quiet.

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NEED MORE THAN SIX MIC INPUTS?

We have determined that six mic inputs takes care of most users’ needs. But if you’re miking a complex drum kit, lots of vocalists or a complete musical (our mixers have been used in several hit Broadway shows, by the way), you can add the XLR10 Mic Input Expander. It adds 10 more high quality discrete, balanced preamplifiers just like the ones on the CR-1604’s Channels 1–6. The unit installs in minutes and forms an integral, structural part of the mixer (in pod-to-back or tabletop configuration, it doesn’t take up any more rack space either). Plus, you can still use the line inputs on the CR-1604’s Channel’s 7–16! Such a deal. Ask your Mackie dealer for more details.

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