Crate Amplifiers CMX62 - Manual (Page 14)

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Equalization Diagrams:
Each input channel of the CMX62 has three bands of equalization which allows you to alter the tonal characteristics of
the input signal. The EQs may be used to add “color” or to compensate for inadequacies of the original signal. They also
may be used to cut frequencies which cause unnatural sounds or to de-emphasize over-pronounced tones and to reduce
acoustic feedback. Each EQ has a range of 30dB (+/-15dB).
The high EQ for each channel is a “shelving” type, with an action point (+6dB) at 2.5kHz, reaching maximum effect at
12kHz and above.
The middle EQ for each channel is a “peaking” type, which affects frequencies from 300Hz to 2.5kHz, centered on
800Hz.
The low EQ for each channel is a “shelving” type with an action point (+6dB) at 300Hz, reaching maximum effect at
70Hz and below.
TIP = SIGNAL "+" (IN-PHASE)
RING = SIGNAL "-" (OUT-OF-PHASE)
SLEEVE = SHIELD
TIP RING
SLEEVE
RING SLEEVE
BALANCED SIGNAL CABLE:
TIP
TIP = SIGNAL
SLEEVE = SHIELD
TIP
SLEEVE
SLEEVE
UNBALANCED SIGNAL CABLE:
TIP
TIP = SIGNAL "+"
SLEEVE = SIGNAL "-"
TIP
SLEEVE
SLEEVE
*Speaker cables typically do not use or require a shield.
SPEAKER CABLE:
TIP
Differences in Cable Types:
This manual makes reference to different types of cables; in particular, balanced and unbalanced signal cables and
speaker cables. These are not the only types of cables associated with sound reinforcement, but they are similar enough to
each other to warrant a more descriptive explanation. The three 1/4”-terminated cables below may look alike at first, but
upon closer examination their differences become apparent. These cables are illustrated below.
20
-10
0dB
+10
+20
+30
-20
50 100 200 500 1k 2k 5k 10k 20k 40k Hz
Care must be taken to
avoid using SIGNAL cables
in place of SPEAKER cables
and vice-versa.
Signal cables aren’t made
to handle the power which
speaker cables do; speaker
cables are not shielded and
pick up external signals,
resulting in excessive hum
and buzzing.
CMX62 Stereo Console Mixer