CX672, CX872 & CX1272 CONTROLS
QUICK START UP
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 the unit turned off, complete the following procedures:
1.CONNECTING AC POWER TO YOUR MIXER
• Check the rear panel to make sure the mixer has the correct AC
Line Voltage. (120VAC or 240 VAC)
• Use only a grounded (3 prong) power outlet to prevent a shock
hazard. This gives the quietest grounding for your mixer. 2.CONNECTING SPEAKERS (Powered Models Only)
•Use the 1/4” speaker jacks on the rear panel to connect up to four 8Ω speaker systems per jack (daisy chain). The speaker cables
are to be
tar cables, or
mally shieldedand of a very light gauge causing a sub- stantial loss of power.
3.SpeakerGuard™ and the “PROTECT” LED
• The protect LED comes on along with the output relays in three
diff | erent protection modes: Shorted speaker outputs, |
going to the Pan control. Here is where the individual channel vol- umes are adjusted to make up the desired mix heard at the main outputs. A general rule to prevent distortion with in the mixer is to always keep the MAIN master level the same or higher than the channel LEVEL.
5. MONITOR LEVEL CONTROL
The Mon level control adjusts the volume of the channel going to the monitor mix. Here is where the individual channel monitor volumes are adjusted to make up the desired mix heard at the monitor out- put. The monitor level control is
6. CHANNEL PAN CONTROL
The Pan control adjusts where the channel is heard in the stereo field of the stereo main outputs. If it is turned to the extreme left, then the channel will only be heard in the left main output and sim- ilarly only in the right main output if turned to the extreme right. In
three function as boost (clockwise) & cut
MASTER SECTION FEATURES
11. MAIN MASTER LEVEL CONTROL
The Main control is the master volume control for all channels receiving the signals from the channel pan controls. The Main feeds the Graphic EQ, the main line out jacks and the internal power amplifier(s). If the power amp switch is out, then the Main control sends a stereo mix from all channels to both power amps. If the power amp switch is pushed in, then the Main controls sends a mono mix from all channels to the left power amp only, and the master MONITOR level sends the channel MON to the right power amp only.
Speaker Impedance | below | minimum rating, and when the |
amplifier exceeds maximum | operating temperature. |
• In event the LED comes on, turn off the amplifier and Identify and correct any speaker cable or speaker jack shorts and make sure
the | total speaker Impedance for each output is 2 ohms or | ||
greater. Also | make sure the fan | is not blocked and | |
check that cool air can circu | late around the | ||
rear of the mixer. |
|
| |
4.CONNECTING INPUTS TO YOUR MIXER |
|
•For low level balanced devices such as microphones, plug into the balanced MIC inputs using a shielded microphone cable with XLR
ends.
•For high level unbalanced devices such as instruments &
CX672, CX872 & CX1272
Keyboards plug into the LINE input jacks using a shielded cable
with 1/4” phone ends. Set the GAIN switch so the level con- trol is not over sensitive.
5.TURNING YOUR MIXER ON
•Adjust all channel and master level controls to their off positions
•Adjust all “EQ” tone controls— the channel’s Hi, Mid, and Bass and the two master 9 Band Graphic EQ’s to their center position.
•Adjust all the Channel “PAN” controls to their center position.
•Set the power amp switch (located next to main volume) out for stereo mode
•Turn the mixer on by the rear panel power switch and watch for the power LED to come on. Your mixer is now ready to operate.
MIC CHANNEL FEATURES
1. LINE INPUT JACK
The Line input is a 1/4” phone jack designed for unbalanced line and instrument level inputs. Examples of these inputs would be instru- ments such as a guitar, a keyboard, an unbalanced mic, or a
2. XLR MICROPHONE INPUT
The XLR Mic input is designed for balanced low impedance (micro- phone) input signals. The differential balanced input amplifier reduces the common noise picked up on the microphone cables. The XLR connector is wired as per the industry standard, pin 1 is ground, pin 2 is
3. +20DB GAIN SWITCH
The gain switch increases the input sensitivity on both the line and mic input jacks by 20dB. After determining the input is too low for mixing with the level control, turn down the level control, press in the gain switch, and adjust the level again. If distortion is heard regardless of the channel level control’s setting, disengage this switch to eliminate
4. CHANNEL LEVEL CONTROL
The Level control adjusts the final volume of the channel before
7
6
5
4
3
2
1
the center position the channel is heard equally in both the left and right main outputs. A good starting point for the pan is in the cen- ter position. Then if stereo placement is needed, a quarter turn to the desired side from the center position gives a smooth placement in the stereo field, or if desired a full turn to one side gives a hard placement.
7.CHANNEL EFFECTS 1&2 LEVEL CONTROL
The EFF 1&2 control adjusts the volume of the channel going to the internal effects Send 1 master control, and directly to the EFF SND
2output. The effects control is
Each channel features active tone controls LO, MID, and HI. All
12. POWER AMP INPUT SELECTOR
The Power Amp selector selects the inputs to the two graphic EQ’s and the power amplifiers. The out position is the normal stereo power mixer mode. The inputs to the two EQ’s are the main left and right signals. In the push in position the main left/right signals are combined to pro- duce one mono signal (still controlled by the MAIN control). This mono signal becomes the input signal to the left EQ (top EQ) and the left power amp. Also, in the in position the output of the monitor jack and control knob becomes the input signal for the right EQ and right power amp.
13.MONITOR MASTER LEVEL CONTROL
The Monitor master level control is the master volume for the mon- itor mix heard in the monitor output. This volume receives its sig- nals from the channel monitor level controls. If the power amp