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The basic hook up is simple, using four (or two stereo) RCA cables plug
the tape send on the mixer into the tape deck’s inputs, and the mixer’s
tape return’s into the tape deck’s outputs.  This will of course be a mono

mix because the CX630 and CX420 are mono mixers, but for playing
back pre recorded stereo tapes this hookup allows both left and right
sides to be heard.  For play back turn up the TAPE/ EFF RTN level con-
trol to the desired play back volume.  For setting the recording level the
MAIN level control is used.  Also, when recording turn down the TAPE/
EFF RTN level as feedback may occur through the tape deck. 

With an effects processor, plug the EFFECTS SEND 1/4” phone output
on the mixer into the input jack on the effects processor, and plug the
EFFECTS RETURN 1/4” phone input on the mixer into the output jack
on the effects processor.  Use the EFF SEND level control to adjust the
volume sent to the external effects unit, and use the TAPE/ EFF RTN
level control to adjust the return volume heard in the main mix.  

MAIN

PHANTOM

MONITOR

REVERB

EFF SEND

TAPE   EFF RTN

TAPE RETURN

TAPE SEND

SEND

MONITOR

MAIN

AMP PATCH

EFFECTS

RETURN

POWER

2

8

0

10

1

9

5

6

4

7

3

5

4

3

2

1

0

10

9

8

7

6

5

4

3

2

1

0

10

9

8

7

6

5

4

3

2

1

0

10

9

8

7

6

0

5

4

3

2

1

10

9

8

7

6

TAPE RECORDER

AUX EFFECTS PROCESSOR

OUT

MONO IN

OUT

TAPE IN (MONO)

4.  TAPE/EFFECTS RETURN LEVEL CONTROL

The TAPE/ EFF RTN is an effects or tape return volume control.  It can receive
input from both the tape return RCA jacks and the 1/4” effects return jack.  This
volume controls the return level being fed back into the main mix. The return
can also be used as just another input to the main mix for a keyboard or other
gear.

5.  REVERB RETURN LEVEL CONTROL

The REVERB return level control is the volume control for the internal reverb
tank.  This volume controls the amount of reverb heard in the main and monitor
mixes.

6.  MONITOR LINE OUT JACK

The MONITOR LINE OUT jack is where the MONITOR master level control’s
signal can be accessed.  This is a line level output and can be used to drive an
external power amplifier or it can be plugged into the AMP PATCH jack to drive
the graphic EQ and the internal power amplifier.

7.  MAIN LINE OUT JACK

The MAIN LINE OUT jack is the post EQ output jack for the main mix.  This out-
put is the same signal that is being feed to the internal power amplifier.

Note: If the AMP PATCH jack is being used for patching the monitor out to the
internal amplifier, then that new signal will also be present on the MAIN LINE
OUT jack.  The original main mix may still be accessed at the RCA TAPE SEND
jacks in this case.

8.  AMP PATCH JACK

The AMP PATCH jack is pre-graphic EQ and normalized to the main mix.
When something is plugged into this jack, the main mix is disconnected from the
graphic EQ and internal power amplifier and the new signal, that was plugged
into the jack, is now going through the graphic EQ and to the internal power
amplifier.  Also this new signal appears at the MAIN LINE OUT jack.  A typical
use for this jack is where power for monitor speakers is needed and a larger
external power amplifier is to be used for the main speakers.  Here the monitor
line out jack can be plugged, or “patched” into the AMP PATCH jack for a pow-
ered monitor mix. 

9.  TAPE SEND AND TAPE RETURN RCA JACKS

The TAPE SEND RCA jacks deliver the main mix output pre the graphic EQ
uninterrupted by the status of the AMP PATCH jack.  The two jacks are linked
internally together so either or both can be used.

Also, the TAPE SEND jacks

are a way to access the main mix, if the amp patch jack is being used.
The TAPE RETURN RCA jacks are RCA inputs to the TAPE/ EFF RTN level
control.  The tape return jacks can also be used for returning another effects
processor or instrument such as a keyboard to the main mix. 
These RCA jacks are Ideal for using a cassette deck to record a mix with the
tape send jacks and then playing it back through the tape returns without using
up any channels or having to use adapters to hook up the cassette deck.

TAPE DECKS AND EXTERNAL EFFECTS

Summary of Contents for CX420

Page 1: ... 6 5 4 3 2 1 0 10 9 8 7 6 0 3 6 12 3 6 9 9 12 0 3 6 12 3 6 9 9 12 MON LEVEL MIC 5 4 3 2 1 0 10 9 8 7 6 EFF REV 20 LINE HI MID LOW 0 3 6 12 3 6 9 9 12 dB 5 4 3 2 1 0 10 9 8 7 6 5 4 3 2 1 0 10 9 8 7 6 0 3 6 12 3 6 9 9 12 0 3 6 12 3 6 9 9 12 MON LEVEL MIC 5 4 3 2 1 0 10 9 8 7 6 EFF REV 20 LINE HI MID LOW 0 3 6 12 3 6 9 9 12 dB 5 4 3 2 1 0 10 9 8 7 6 5 4 3 2 1 0 10 9 8 7 6 0 3 6 12 3 6 9 9 12 0 3 6 12...

Page 2: ... interest of creating new products and improving existing ones Carvin is continually researching the latest state of the art audio design methods and modern packaging and production techniques Thus Carvin reserves the right to make changes in its products and specifications without notice or obligation 1 800 854 2235 619 487 1600 M F 8 to 4 30 INSPECT YOUR CX MIXER FOR ANY DAMAGE which may have oc...

Page 3: ...udio Amp 60 72940 U2 100V 100W DMOS Audio Amp 60 72940 All B Reference Designators are 0 ohm jumpers If you re like most new owners you re probably in a hurry to plug your CX mixer in and use it Here are some brief instructions to get you going quickly With the mixer unplugged and turned off complete the following procedures 1 CONNECTING AC POWER TO YOUR MIXER Check the rear panel to make sure the...

Page 4: ...cies from 10kHz and up to the upper limit of the mixer are all boosted when the knob is turned clockwise and cut when turned counter clockwise from the center position The MID control is a band pass type of tone control with the center frequency set at 1 5KHz The band pass means a middle section of frequences centered around 1 5kHz but not over lapping the HI and LO controls is boosted when the kn...

Page 5: ...UT jack is where the MONITOR master level control s signal can be accessed This is a line level output and can be used to drive an external power amplifier or it can be plugged into the AMP PATCH jack to drive the graphic EQ and the internal power amplifier 7 MAIN LINE OUT JACK The MAIN LINE OUT jack is the post EQ output jack for the main mix This out put is the same signal that is being feed to ...

Page 6: ...l for what they do 1 INPUT CONNECTIONS FROM THE STAGE For live sound reinforcement or public address systems P A Systems the input signals to the mixer will come from the microphones and instruments on the stage Each microphone or instrument to be amplified by the P A system must be connected to one of the mixer s inputs It is preferred to have as many of the stage instruments as possible plugged ...

Page 7: ...he type described in the operating instructions or as marked on the appliance GROUNDING OR POLARIZATION Precautions should be taken so that the grounding or polarization means of an appliance is not defeated POWER CORD PROTECTION Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them paying particular attention to cords at pl...

Page 8: ...TURES 3 4 MASTER SECTION FEATURES 5 7 SETTING UP YOUR SOUND SYSTEM 8 10 SAMPLE PA SYSTEM CONFIGURATIONS 11 12 TAPE DECKS AND EXTERNAL EFFECTS 13 SPEAKER CONNECTIONS 14 BLOCK DIAGRAM 15 CX MIXER PARTS LIST 16 17 CX MIXER TECHNICAL SPECIFICATIONS 18 FUSE SELECTIONS 18 WARRANTY INFORMATION 19 CX MIXER SPECIFICATIONS TABLE OF CONTENTS Fuse Selector Chart for 120 VAC Models Model Fuse Value Carvin Size...

Page 9: ...d PC Vert MTG 21 40022 J4 Jack 1 4 3Pin Plastic 24mm 21 06453 J5 Not Assigned J6 Jack 1 4 3Pin Plastic 24mm 21 06453 J7 Jack 1 4 3Pin Plastic 24mm 21 06453 J8 Jack 1 4 3Pin Plastic 24mm 21 06453 J9 Jack 1 4 3Pin Plastic 24mm 21 06453 J10 Jack 1 4 3Pin Plastic 24mm 21 06453 J11 Jack 1 4 3Pin Plastic 24mm 21 06453 P1 Pot 12x35mm D B50K C 71 13057 P2 Pot 12x35mm D B50K C 71 13057 P3 Pot 12x35mm D B50...

Page 10: ... for the main mix heard at the RCA tape send outputs If the amp patch jack is not being used then this is also the master volume control feeding the graphic EQ the main line output jacks and the internal power amplifier 2 MONITOR MASTER LEVEL CONTROL The MONITOR master control is the master volume for the monitor mix This volume control receives its signals from the channel MONITOR level controls ...

Page 11: ...in the channel s XLR jack This power is used for supplying a bias voltage to con denser microphones The LED indicates the phantom power is turned on The phantom power will not damage dynamic microphones 12 THE GRAPHIC EQUALIZER Each mixer has a nine band graphic EQ equalizer The graphic EQ is dedicat ed to the main output following or post the amp patch jack of the mixer The 9 band Graphic EQ prov...

Page 12: ...ne plug type from an instrument is needed to be plugged into the snake or directly into the LINE input of the mixer This can be accomplished by a high to low impedance adapter or a Direct box both are available from Carvin or other electronics out lets Once all the input cables to the mixer have been connected properly label the channels Verify that all the connections are good and that all mics a...

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