Owner's Manual
5 14
The recommended speaker impedance and connection is two 8 ohm
speakers, one to each 1/4 phone jack. This is not the same as patching
one speaker to another speaker and plugging the pair into one of the
speaker jacks. The reason is the CX630 and CX420 are made with two
amplifiers one to each jack. The equivalent impedance of a linking two
8 ohm speakers together would be 4 ohms into one of the jacks, which is
NOT recommended. The CX630 mixer can handle 4 ohms at low oper-
ating levels with no added distortion, but at high levels with the CX630 or
loading the CX420 with 4 ohms per jack may result in premature distor-
tion (or a crackling sound) , however, this will not damage the amplifiers.
If this sound is heard, simply back off the MAIN volume until the no dis-
tortion is heard.
200 Watts
SPEAKERS
4Ω LOADS CAN RESULT IN
PREMATURE DISTORTION
8Ω 8ΩMIN.
8 OHM MINIMUM
MAIN SPEAKERS
8 OHM MINIMUM
MAIN SPEAKERS
1. MAIN MASTER LEVEL CONTROL
The MAIN level control is the master volume control for the main mix. This vol-
ume control receives its signals from the channel LEVEL controls, 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, for
the monitor mix heard in the monitor output. Some of the internal reverb signal is
also sent to the MONITOR control.
3. EFFECT SEND MASTER LEVEL CONTROL
The EFFECT SEND master control is the master volume for the effects send
mix. This volume control gets its signals from the EFF/REV control on the chan-
nels, for the effects send mix heard in the effects send output. The typical use of
the effects send mix is to drive external effects processors ,but it can also be
used as another monitor mix if needed.
CX630
GRAPHIC EQ
0
8
4
4
8
–12
+12
125 250 50063 1K 2K 4K 8K 16K
MAIN
PHANTOM
MONITOR REVERB
EFF SEND TAPE EFF RTN
TAPE RETURN
TAPE SEND
SEND MONITOR MAINAMP PATCH
EFFECTS
RETURN
POWER
2 8
0 10
1 9
5
64
73
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
6
9
12
13
1
2
3
10
7
5
4
11
8
MASTER SECTION FEATURES SPEAKER CONNECTIONS