Inter-m CA-6220 User manual

CA-6220/8220 Stereo Powered Mixer

Contents
Contents
1. Introduction/Unpacking and Installation .................................................................................1
2. Features ................................................................................................................................2
3. Precautions............................................................................................................................3
4. Front Panel Controls...............................................................................................................4
5. Rear Panel Controls .............................................................................................................10
6. Operating Tips.....................................................................................................................11
7. Connections.........................................................................................................................20
8. Block Diagram.....................................................................................................................21
9. Specifications.......................................................................................................................22
OFFICE :
226-9 DUGJUNG - LI, HOE CHUN - EUB,
YANGJU - KUN, KYUNGKI - DO, KOREA
TEL : [phone]~5, FAX : [phone]
Home Page : http://www.inter-m.com
E-mail : [email protected]

CA-6220/8220 1
STEREO POWERED MIXER
Introduction
Unpacking and Installation
Introduction
Thank you for purchasing a CA-6220/8220 Powered Mixer. The CA-6220/8220 provides an excellent
balance of operability, functionally and ease of use. In order to take full advantage of the CA-6220/8220
capabilities and enjoy years of trouble-free use, please read this manual carefully.
Unpacking and Installation
Although it is neither complicated to install nor difficult to operate your set, a few minutes of your time is
required to read this manual for a properly wired installation and becoming familiar with its many features
and how to use them. Please take a great care in unpacking your set and do not discard the carton and
other packing materials. They may be needed when moving your set and are required if it ever becomes
necessary to return your set for service.
Never place the unit near radiators, in front of heating vents, to direct sun light, in excessive humid or dusty
location to avoid early damage and for your years of quality entertainment. Connect your complementary
components as illustrated in the following page.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.
DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
This symbol is intended to alert the user to the
presence of uninsulated “dangerous voltage”
within the product’s enclosure that may be of suf-
ficient magnitude to constitute a risk of electric
shock to persons.
This symbol is intended to alert the user to the
presence of important operation and mainte-
nance (servicing) instructions in the literature
accompanying the appliance.
Caution: To prevent electric shock do not use this (polarized) plug
with an extension cord, receptacle or other outlet unless
the blades can be fully inserted to prevent blade expo-
sure.
Attentions: Pour prévenir les chocs électriques ne pas utiliser cette
fiche polarisée avec un prolongateur, une prise de
courant on une autre sortie de courant, sauf si les
lames peuvent étre insérées à fond sans en laisser
aucune partie à découvert.

CA-6220/8220
2
STEREO POWERED MIXER
Features
Features
- 6/8 CHANNEL INPUTS, AND 2 CHANNEL OUTPUTS
CA-6220/8220 Stereo Powered Mixer provides 6, 8 channel mono input that can be mixed down to a
stereo, and 2 Aux Send 1 Monitor output.
- EACH INPUT CHANNEL WITH TONE CONTROL
3 element equalizers are provided to adjust the acoustic characteristics according to microphone, speakers
and room structure.
- TRIM CONTROL AND PEAK INDICATOR
Trim control and peak indicator which are provided on each channel for the input level can be adjusted
adequately.
- 48V PHANTOM POWER
- 9 BAND GRAPHIC EQUALIZER
This unit include stereo 9 band graphic equalizer for precise sound control.
- 16-BIT DIGITAL STEREO EFFECTS PROCESSOR
The effects on the CA-6220/8220 is a 16 bit digital signal processor with a choice of 256 preset effects.

3
CA-6220/8220
Precautions
Precautions
- AVOID EXCESSIVE HEAT, HUMIDITY, DUST AND VIBRATION
Keep the unit away from locations where it is likely to be exposed to high temperatures or humidity–such as
near radiators, stoves, etc. Also avoid locations which are subject to excessive dust accumulation or vibra-
tion which could cause mechanical damage.
- VENTILATION
The unit has ventilation slots on the side and bottom panels. Do not block these vents.
- AVOID PHYSICAL SHOCKS
Strong physical shocks to the unit can cause damage. Handle it with care.
- DO NOT OPEN THE CASE OR ATTEMPT REPAIRS OR MODIFICATIONS YOURSELF
This product contains no user-serviceable parts. Refer all maintenance to qualified Inter-M service person-
nel. Opening the case and/or tampering with the internal circuitry voids the warranty.
- ALWAYS POWER OFF BEFORE MAKING CONNECTIONS
Always turn the power OFF before connecting or disconnecting cables. This is important to prevent damage
to the unit itself as well as other connected equipment.
- HANDLE CABLES CAREFULLY
Always plug and unplug cables–including the AC power cord–by gripping the connector, not the cord.
- CLEAN WITH A SOFT DRY CLOTH
Never use solvents such as benzine or thinner to clean the unit. Wipe clean with a soft, dry cloth.
STEREO POWERED MIXER

4CA-6220/8220
STEREO POWERED MIXER
Front Panel Controls
Front Panel Controls
1. MONO INPUT SECTION
1. PEAK LED INDICATORS
This LED indicators let you check the level of the signal
input to the channel.
The peak indicator lights when the input signal reaches
3dB below the channel’s clipping point.
This indicator show the level of the post-EQ/pre-fader
signal. If the PEAK indicator lights more than briefly on
high-level transients, you should use the TRIM control to
decrease the input sensitivity of the channel.
2. CHANNEL LEVEL
This is the channel’s main level control. It determines the
level of the signal that is sent from the channel to the
master mixing and effect buses. It is the settings of the
input channel levels that determine the “mix”, or the
balance of sound levels between the instruments or other
sources connected to the input. When a channel is not
being used, its level should be set at the minimum posi-
tion to prevent the addition of unwanted noise to the
main program signal.
3. PAN
This control pans the channel signal across the master L
and R buses, thus determining the perceived position of
the sound from that channel in the output stereo sound
field. If a PAN control is set all the way to the left, for
example, the sound from that channel will be heard from
the left-speaker system only. If it is set all the way to the
right, the sound will be heard from the right speaker
system only. Intermediate settings will cause the sound to
appear at corresponding locations in the stereo sound
field.
4. EFF1/MONI
This control determines the level of the post-EQ/pre-
channel level signal that is sent from the channel to the
EFF1/MON mixing bus. The channel signals mixed by this bus have their overall level set by the EFF
SEND 1 fader and MON fader, then are sent to the EFF SEND 1 jack and MON jack. The output from
EFF SEND 1 jack can be processed by an external effect device.
5. EFF2/REV
This control determines the level of the post-EQ/post-channel level signal that is sent from the channel
to the EFFECT 2 mixing bus. The channel signals mixed by this bus are sent via the EFFECT SEND 2
fader to the EFFECT SEND 2 jack. The output signal is also fed into CA-6220/8220’s internal digital
signal processor. Thus, a signal fed to the EFFECT 2 bus using this control can be processed externally
or internally.
MIC 1
PEAK
LEVEL
010
010
010
LOW
HIGH
LINE
MID
EFF2
/REV
15 15
15 15
15 15
EFF1
/MONI
TRIM
4
16 60
40
PAN
LR
5
1
2
3
4
7
6
8
9

5
CA-6220/8220
6. EQUALIZER CONTROL
This set of three controls allows you to individually modify the channel’s response. Each channel of the
CA-6220/8220 is equipped with a three-band equalizer (EQ) that has shelving HIGH and LOW con-
trols, and a peaking MID control.
Refer to “Using the Channel Equalizers” for detail on the use of these controls.
7. TRIM
This control adjusts the channel’s input sensitivity between –60dB and –16dB at XLR jack operating or
between –40dB and +4dB at 1/4” phone jack operating on front panel. Continuously variable trim con-
trol allows optimum adjustment to virtually any microphone or line source.
8. BALANCED LINE INPUT CONNECTORS
A standard 1/4” phone jack is used for balanced or unbalanced line level signals. Examples of line lev-
el signals include most electronic keyboards, synthesizers, turntables (with appropriate preamps), tape
decks and the line outputs from other mixers. All input channel controls, including the variable gain con-
trol, affect the LINE input.
9. BALANCED LOW-Z MIC INPUT CONNECTORS
A 3-pin XLR-type connector is used for balanced low impedance microphone input. (pin 1: sleeve, pin 2:
hot, pin 3: cold)
Microphone of 50~600Ωor 600Ωline level devices can be connected here. When the PHANTOM
switch is turned on, DC +48V will be supplied to pin 2 and 3 of these connectors.
STEREO POWERED MIXER
CONTROL
HIGH
MID
LOW
MAX. BOOST/CUT
±12dB
±15dB
±12dB
FREQUENCY
10kHz
2.5kHz
80Hz
TYPE
Shelving
Peaking
Shelving
+20
+15
+10
+5
0
-5
-10
-15
-2020 50 100 200 500 1k 2k 5k 10k 20k
FREQUENCY (Hz)
RESPONSE (dB)
1
2
3
+48Vdc
Mic input jack with phantom power
1
0V GND
+48Vdc
3
PHASE
1GND
(+)
( )
3
2

2. MASTER SECTION 1
1. LED LEVEL METER
This precision LED meters display the levels of
the signals output line output. These meters
serve as useful guides when setting optimum
output levels using the master stereo faders.
2. 9-BAND GRAPHIC EQUALIZER
The CA-6220/8220’s internal stereo graphic
equalizer (GEQ) allows fine response shaping
of the main program output. These section has
nine linear controls per channel, correspond-
ing to center frequencies of 63Hz, 125Hz,
250Hz, 500Hz, 1kHz, 2kHz, 4kHz, 8kHz and
16kHz. Each control permits a maximum boost
or cut of 12dB. When a control is set to the
center or “0” position, the response in the cor-
responding band is unaffected.
3. MASTER LEVEL
These are the main volume controls for the overall program mix. They independently adjust levels of the
right and left channels of the stereo signal that is sent to both the rear-panel SPEAKER jacks and the
PHONES jack of the line out on the front panel.
4. LINE OUT JACKS
LINE OUT L jack is delivered by summing all of the inputs assigned to the left subgroup bus. A pan control
rotated fully counterclockwise to the “L” position will assign that signal only to the left bus. LINE OUT R jack
is the right subgroup equivalent of the LINE OUT L. The signals are sent at a normal level of +4dB.
5. AMP IN JACKS
When you connect a plug to this jacks, you disconnect the power amplifier input from the graphic
equalizer output or line output. And the power amplifier is drived by the signal through the inserted plug.
6. TAPE TO MON AND TAPE TO EFF CONTROLS
These controls adjust the level of the stereo signals from a connected tape deck to MONITOR and EFFECT
SEND jacks respectively.
6CA-6220/8220
STEREO POWERED MIXER
0
0
TAPE TO EFF
L
R
REC
OUT
L
R
LEVEL 18 13 10 7 4 2 0 2 423
LINE OUT
AMP IN
LR
L
R
TAPE
IN
010 10
010 10
TAPE TO MONI
REC OUT
TAPE IN
EQ 9 BAND STEREO
63 125 250 500 1K 2K 4K 8K 16K
12
0dB
12
STEREO POW
CA 6220
I
12
0dB
12
010010
L MASTER R 6
7
8
2
3
5
4
1
+15
+10
+5
0
-5
-10
-1520 100 1k 10k 20k
FREQUENCY (Hz)
RESPONSE (dB)

7
CA-6220/8220
7. REC OUT AND TAPE IN CONTROLS
These controls adjust the levels of the stereo signals to and from a connected tape deck. The REC OUT
control sets the level of the unequalized pre-fader master mix signal that is sent for recording by the tape
deck via the REC OUT jacks. The TAPE IN control adjusts the level of the playback signal that is inserted to
the master mixing bus from the TAPE IN jacks.the GEQ. The level of these signals are adjusted by the
REC OUT and TAPE IN controls.
8. REC OUT AND TAPE IN JACKS
These phone jacks are used to send stereo signals (–10dBV) to and from a connected tape deck. The
REC OUT jacks send the unequalized pre-fader signal from the master bus for recording by the tape
deck.
The TAPE IN jacks connected the playback signal from the tape deck to the master mixing bus in front of
the GEQ. The level of these signals are adjusted by the REC OUT and TAPE IN controls.
STEREO POWERED MIXER

8CA-6220/8220
STEREO POWERED MIXER
3. MASTER SECTION 2
1. DIGITAL EFFECT SECTION
This section lets you control the CA-6220/8220’s
internal digital signal processor. The ON switch
selects between input from the internal DSP and
input from the EFFECT RETURN 2 jack.
2. EFFECT SEND CONTROLS
These controls adjust the overall output levels of the
effect mixes that are set up using the EFFECT 1 and
EFFECT 2 controls of each input channel. The EFFECT
SEND 1 control sets the overall level of the signal that
appears at the EFFECT SEND 1 jack. The EFFECT
SEND 2 control sets the overall level of the Effect 2
mix signal, which is sent to both the EFFECT SEND 2
jack and the internal digital signal processor. These
controls should be used to optimally match the effect
mix output levels to the input sensitivities of the effect
signal processors used.
3. EFFECT RETURN JACKS
The output from external effect units fed by the
EFFECT SEND jacks can be returned to the main pro-
gram mix via these 1/4” phone jacks. Note that both
effect circuits have stereo EFFECT RETURN jacks,
allowing the CA-6220/8220 to accommodate effect
devices with stereo output. To return a monophonic
effect signal to both channels of the master stereo
mixing bus, use the EFFECT RETURN L jack. (The R jack should be left open.) The level of the signals input
by these jacks are adjusted by the corresponding EFFECT RETURN controls. The nominal input level for
these jacks is +4dB.
4. EFFECT SEND JACKS
These 1/4” phone jacks deliver the corresponding effect mix signals to feed external effect devices. Note
that the EFFECT SEND 2 output is active even when the internal digital signal processor is turn on. The
levels of the signals output by these jacks are adjusted by the corresponding EFFECT SEND controls. The
nominal output level for these jacks is +4dB.
9
12
11
10
872
1
43
14 15
13
16
5
6
RET 1
L/MONO RET 2 L/MONO
RET 1
R RET 2
R
SEND 1 SEND 2
010
RET 1 RET 2
SEND 1 SEND 2
010
PROGRA PARAMETER
DSP ON
OFF
9
12
11
10
872
1
43
14 15
13
16
5
6
REVERB 1
REVERBS 2
REVERBS 2
DELAYS/FLANGER
7
815 16 FLANGER/CHORUS
FLANGER/CHORUS
010
010
1
2
3
4