LIMITED WARRANTY
PB23 Phantom
Power Adapter
This product is warranted to the original consumer purchaser to
be free from defects in materials and workmanship under normal installa-
tion, use and service for a period of one (1) year from the date of purchase
as shown on the purchaser’s receipt.
• Powers a condenser microphone requiring
phantom power
The obligation of Rolls Corporation under this warranty shall be
limited to repair or replacement (at our option), during the warranty period
of any part which proves defective in material or workmanship under
normal installation, use and service, provided the product is returned to
Rolls Corporation, TRANSPORTATION CHARGES PREPAID. Products
returned to us or to an authorized Service Center must be accompanied by
a copy of the purchase receipt. In the absence of such purchase receipt, the
warranty period shall be one (1) year from the date of manufacture.
This warranty shall be invalid if the product is damaged as a
• 12 or 48 Volts available
• AC adapter included
• High frequency switching power supply to
elliminate noise
result of defacement, misuse, abuse, neglect, accident, destruction or
alteration of the serial number, improper electrical voltages or currents,
repair, alteration or maintenance by any person or party other than our
own service facility or an authorized Service Center, or any use violative
of instructions furnished by us.
The PB23 is for powering a phantom powered
microphone with either 12 or 48 VDC.The unit
uses a 100kHz switching power supply to
elliminate noise generated by common power
supplies. The PB23 has pull-down resistors so it
will work with any mixer. 2 DC jacks have been
included so several units may be operated with
one power supply.
This one-year warranty is in lieu of all expressed warranties,
obligations or liabilities. ANY IMPLIED WARRANTIES, OBLIGA-
TIONS, OR LIABILITIES, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, SHALL BE LIMITED IN DURA-
TION TO THE ONE YEAR DURATION OF THIS WRITTEN LIMITED
WARRANTY. Some states do not allow limitations on how long an
implied warranty lasts, so the above limitation may not apply to you.
IN NO EVENT SHALL WE BE LIABLE FOR ANY SPE-
CIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR
BREACH OF THIS OR ANY OTHER WARRANTY, EXPRESSED OR
IMPLIED, WHATSOEVER. Some states do not allow the exclusion or
limitation of special, incidental or consequential damages so the above
limitation or exclusion may not apply to you. This warranty gives you
specific legal rights, and you may also have other rights which vary from
state to state.
Rolls Corporation
Salt Lake City, UT
9/95
INTRODUCTION
AC ADAPTER
Thank you for purchasing the PB23 Phantom Power Adapter, the unit is
designed to provide years of lasting value and usefulness. The unit
powers a condenser microphone that is designed for phantom powering.
Phantom power microphones provide much greater dynamic range, lower
noise and better sound quality. Most microphones will operate at full
performance with 12 volts DC, however some mics require 48 volts which
was the old tube mic standard.The PB23 features selectable voltage
levels.
MIC
MIC
12VDC PWR
LOOP
OUTPUT
INPUT
MIXER
PHANTOM POWER
ADAPTER
PB23
OPERATION
Switch the PHANTOM VOLTAGE to the appropriate setting. Connect a
condenser microphone to the input connector(s) and connect the
output(s) to a mixer or other audio input device. Apply power to the unit by
connecting the enclosed adapter to an AC outlet and to the 12VDC
Power Loop.The LED on the front of the unit will light.The two DC input
jacks are provided in order to use one power supply to power more than
one unit.The units provide no audio gain as they are not microphone
preamps.
PHANTOM VOLTAGE
12 VOLT • 48 VOLT
C4
47U
47U
2
1
2
1
J1
J2
XLR M PC
C3
3
3
XLR F PC
R4
R5
6.8K
6.8K
C10
503
U1A
4069
C7
C8
C9
.047
.047
.047
2
1
2
4
SW1A
DPDT
U1F
U1E
U1B
U1C
4069
13
12
11
10
3
5
48V
1
3
12V
MIC
OUTPUT
MIC
INPUT
12VDC PWR
LOOP
4069
4069
4069
R3
10K
R1
22K
6
4069
U1D
9
8
C10
120PF
D6
D5
D3
D7
D4
D2
C5
1U
C11
1U
C6
1U
1N4148
1N4148
1N4148
1N4148
1N4148
1N4148
U2
7812
J3
2
3
1
1
3
I
O
G
C2
1 UF
2
C1
JAPDC
PHANTOM POWER
ADAPTER
PB23
1000UF
D1
1N4001
ROLLS CORPORATION
Title
PB23 PHANTOM BOX
PB23.SCH
Size
Document Number
REV
A
Date:
September 4, 1995
Sheet
of
SPECIFICATIONS
PhantomVoltage:
Jacks:
PHANTOM VOLTAGE
12 VOLT • 48 VOLT
12V or 48V selectable
Male and Female XLR jacks,
2:5mm DC input jacks
Control:
Power Input
Size:
12/48 volt selector switch
14 - 18VCD (adapter included)
3" x 2.5" x 1.25"
Weight:
1 lb (.45 Kg)
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