THREE BAND
CHANNEL TONE
CONTROLS
PAD
-20dB
PAD SWITCH
HI
MID
LOW
MIC
PRE
CHANNEL
LEVEL
CHANNEL
EFF SND
CHANNEL
MONITOR
LEVEL
MAIN
MON
EFF
EFFECTS
SUMMING AMP
EFFECTS
SEND LEVEL
MAIN LEFT
SUMMING AMP
AND LEVEL
EFFECTS SEND
GAIN STAGE
MAIN
LINE OUT
NINE BAND
GRAPHIC
EQUILIZER
EFFECTS
SEND
TO INTERNAL
REVERB TANK
MONITOR
SUMMING AMP
MONITOR
LINE OUT
LEFT
AMP PATCH
EFF INPUT
TAPE RTN
RETURN
FOR INTERNAL
REVERB TANK
LEFT
TAPE OUT
TO INTERNAL
POWER AMP
REV. TO
MONITOR
1155 Industrial Ave.
Escondido, CA 92029
619-747-1710
FAX 747-9065
CX 630 & CX420
BLOCK DIAGRAM
Pt
N
CHANNEL
line pad
(-26dB)
15
4
6. CHANNEL EFFECTS/REVERB LEVEL CONTROL
The EFF/REV level control adjusts the volume of the channel going to the
effects send master control, and the internal reverb tank. The effects control is
post channel level. This means adjustments in the channel’s EQ or level con-
trols will be affecting the effects send of that chan-
nel.
7-9. CHANNEL TONE CONTROLS
Each channel features three tone controls LO, MID,
and HI. The LO and HI controls are shelving type
tone controls with corner frequencies at 100Hz and
10KHz respectively. The shelving means, the for
the LO control, all frequencies from 100Hz down to
the lowest frequency the mixer can handle are all
boosted when the knob is turned clockwise and cut
when turned counter-clockwise from the center
position. For the HI control the shelving means all
the frequencies 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 knob is turned clockwise and cut when
turned counter-clockwise from the center position.
Familarity with the channel tone controls:
The three tone controls can add brightness, clairity, and control to the channel’s
input signal. Here are some tonal references for these tone controls.
• LO affects the deep low bass tones and the typical bass tones.
• MID affects all the middle frequencies where the clairty of an average persons
spoken voice is mostly heard. Also the MID incompases the louder sometimes
harsher tones that can distort the over all sound of the system.
• HI affects the treble tones and very high treble tones bringing brightness and
brillance to the channel’s input.
Adjusting:
Use these controls to change the tonal shape of the input signal and in many
cases to reduce possible feedback from microphones near the mixer’s output
speakers. It is suggested the channel tone controls start out in their center
detent position where they do not effect the original incoming signal. Then, if
needed, turn the tone controls (boost,turn to the right, or cut, turn to the left) to
change the sound.
1
EFF
REV
H I
M I D
LOW
0
3
6
1 2
3
6
9
9
1 2
5
4
3
2
1
0
1 0
9
8
7
6
0
3
6
1 2
3
6
9
9
1 2
0
3
6
1 2
3
6
9
9
1 2
6
7
8
9
