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PH-4B
T
he Crown PH-4B is a 48-volt phan-
tom power supply for condenser and
electret-condenser microphones. It
has four channels for powering up to four
microphones.
As shown in Fig. 1, it supplies 48V DC on
mic-connector pins 2 and 3 with respect to
pin 1 (complies with DIN standard 45 596).
The phantom supply is highly filtered to
minimize hum.
The PH-4B itself is powered by 120V AC. It
is also available powered by 220V and 240V
as the PH-4BE4.
Operation
1. Plug the AC cord into a wall outlet. The
LED pilot light will show that the line voltage
is applied.
2. Please refer to Fig. 2. You will connect the
PH-4B between your mic and your system
mic input.
3. Plug the cable from your microphoneinto
one of the mic inputs on the PH-4B.
4. Obtain another mic cable and plug it into
the adjacent output on the PH-4B.
5. Plug the other end of that cable into the
mic input on your mixer or recorder.
The total current drain of all channels of the
PH-4B should not exceed 100 mA. To deter-
mine how much current your microphones
draw, check their data sheets and look for
the current-drain specification.
CAUTION: Inside the mic-cable male XLR
connector (the one that plugs into a PH-4B
input), do NOT tie pin 1 to the shell ground
lug. If pin 1 is tied to the shell and you con-
nect an output of the PH-4B into an unbal-
anced mic input, this connection might
cause hum.
FOUR CHANNEL
AC POWERED 48V
PHANTOM POWER SUPPLY
Specifications
Type: Four-channel, AC powered.
Supply voltage: +48V DC on pins 2 and 3 with
respect to pin 1 of microphone input con-
nector.
Total output current: 100 mA continuous.
Line voltage (PH-4B): 120 VAC.
Line voltage (PH-4BE4): 220 - 240 VAC.
Connectors: 3-pin pro audio (XLR-type) input
and output connectors.
Construction: Steel for strength and magnetic
shielding.
Dimensions: 7 1/16" L x 12" W x 1 3/4" H
(17.93cm x 30.48cm x 4.45cm).
Finish: Black.
Weight: 4 lb. 12 oz. (2.15 kg).
Accessory: RMPB kit.
Fig. 1
MIC IN
TO OTHER
3-PIN
CHANNELS
FEMALE
+
6.8k
1
2
3
+
6.8k
48 VDC
SUPPLY
Fig. 2
MIC
MIC
MIC
IN
MIC 1
OUT
IN
MIC 2
OUT
IN
MIC 3
OUT
PHANTOM
POWER
MIC OUT
3-PIN
MALE
33µF
50V
1
2
3
33µF
50V
MIC
IN
MIC 4
OUT
AUDIO
OUT
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Related Manuals for Crown PH-4B
Summary of Contents for Crown PH-4B
- Page 1 2 and 3 with respect to pin 1 (complies with DIN standard 45 596). The phantom supply is highly filtered to minimize hum. The PH-4B itself is powered by 120V AC. It is also available powered by 220V and 240V as the PH-4BE4. Operation 1.
- Page 2 Hum might also occur if the PH-4B is rack- mounted and connected to an unbalanced mic input. If this happens, electrically isolate the PH-4B from the rack (say, by using ny- lon bolts and washers). How to Prevent Switching Clicks In rare instances, you may need to use the PH-4B with a mic-level switcher.
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