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12
UNBALANCED INPUTS (Channels 7–16)
These inputs are designed for mono unbal-
anced signals from instrument level to –10dBV or
+4dBu. They can be used with just about any pro
or semipro instrument, effect or tape recorder.
MAINS
If you leave this switch in the OFF position, you
won’t hear anything. You can leave the CR-1604’s
MAINS power switch ON all the time since the
mixer is conservatively designed so that heat
buildup isn’t a problem, even in 24-hour-a-day op-
eration. Or just plug everything into a good quality,
grounded power strip for 1-button turn-on.
If you leave it on all the time, don’t worry about
the top of the pod being warm to the touch. We use
the pod chassis as a heatsink for the voltage regula-
tors which in turn dissipates a very mild amount of
heat constantly throughout the chassis. All is well.
AC RECEPTACLE
Look mom, no wall wart! Plug the AC power
cord in here, and enjoy the convenience of the
CR-1604’s built-in power supply. The other
end goes to your power source. If some nasty
+4 –40
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U
–10
•
UNBALANCED LINE INPUTS
+4 –40
14
U
–10
•
+4 –40
15
U
–10
•
+4 –40
16
U
–10
•
PHANTOM
5 4 3 2 1
LOW Z BALANCED MICROPHONE INPUTS
BALANCED/UNBALANCED LINE INPUTS
+4 –40
7
U
–10
•
+4 –40
6
U
–10
•
+4 –40
5
U
–10
•
+4 –40
4
U
–10
•
+4 –40
3
U
–10
•
+4 –40
2
U
–10
•
+4 –40
1
U
–10
•
SENSITIVITY
ADD 8dB FOR
MIC INPUTS
+4 –40
8
U
–10
•
+4 –40
9
U
–10
•
+4 –40
10
U
–10
•
+4 –40
11
U
–10
•
+4 –40
12
U
–10
•
6
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• DC Power is applied to Pins 2 and 3. Maximum
current is 10mA per microphone.
• When turned off, the phantom power circuitry
takes a moment for voltage to bleed to zero. Do
not attempt to adjust your set.
• There is only one “freak” way to damage a
ribbon mic with phantom power. If the connec-
tor on the mic cable is worn, it may not make
contact with both “hot” pins exactly at the same
time when being plugged in. This could cause a
momentary DC spike that could, in turn,
damage or dislodge the ribbon. To avoid this
remote possibility, always plug in ribbon mics
before you turn the PHANTOM power switch
on or off.
WARNING: If you’re connecting electret-
type microphones, plug them into Channel
7–16. Avoid the temptation to use Channel
1–6 XLR sockets via
1
/
4
"-to-XLR adaptors
and then turn on the PHANTOM switch. If
you do, the microphone will be toast. Also,
don’t connect electronically balanced com-
ponents such as CD players or the output of
a tape deck to the XLR inputs. Use Channel
1–6 balanced
1
/
4
" inputs instead.
BALANCED LINE INPUTS (Channels1–6)
These six line inputs share circuitry (but not
phantom power) with the six mic preamps, and
can be driven by balanced and unbalanced de-
vices. In other words, you can use these inputs for
virtually any signal you’ll come across, from in-
strument levels to –10dBV to +4dBu, since there
is 40dB of gain available.
• To connect these inputs to balanced sources,
use a Tip-Ring-Sleeve (3-conductor) plug:
Tip = Positive (+ or hot)
Ring = Negative ( – or cold)
Sleeve = Shield (ground)
• To connect unbalanced sources to the
balanced inputs, use a mono phone plug or
standard instrument cable. The jack on the
CR-1604 input will sense the plug and
disable the balancing circuits.
• Line inputs 1–6 are a good place to connect
instruments which have low output such as older
keyboards. Or keyboards in general for that matter,
since you can adjust the corresponding channel
INPUT SENSITIVITY controls so the mixer has
plenty of gain, but you can still keep the keyboard
volume set around the halfway mark.
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A CLOSER LOOK
WHY NO WALL WART?
Building a power supply into
the CR-1604 wasn’t any picnic.
But we think that you’ll appre-
ciate it for several reasons:
• The CR-1604 has separate
regulated power supplies for the audio, meter,
12VAC lamp and microphone phantom circuits.
That’s part of why it sounds so good. No wall wart
can provide this kind of sophisticated power.
• Wall warts and “line lumps” are inconvenient,
generate huge hum fields, hog extra jacks on your
power strip and get in the way when you move.
• The thin cable coming out of a wall wart or
in-line power supply breaks easily, especially on the
road. Then you need a whole new one, possibly of
some esoteric breed that’s only available from the
manufacturer on alternate Thursdays via an un-
listed phone number. If the rugged cord on the
CR-1604 wears out, you can score one anywhere
fast. Except maybe in the far reaches of the galaxy.
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MAINS PHANTOM
+48V
ON OFF
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INPUT
OUTPUT
POD