
have other rights which vary from state to state.
not apply to you. This warranty gives you specific legal rights, and you may also
incidental or consequential damages so the above limitation or exclusion may
EVER. Some states do not allow the exclusion or limitation of special,
OR ANY OTHER WARRANTY, EXPRESSED OR IMPLIED, WHATSO-
INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF THIS
may not apply to you.
allow limitations on how long an implied warranty lasts, so the above limitation
DURATION OF THIS WRITTEN LIMITED WARRANTY. Some states do not
LAR PURPOSE, SHALL BE LIMITED IN DURATION TO THE ONE YEAR
W ARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICU-
LIABILITIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED
obligations or liabilities. ANY IMPLIED WARRANTIES, OBLIGATIONS, OR
authorized Service Center, or any use violative of instructions furnished by us.
maintenance by any person or party other than our own service facility or an
serial number, improper electrical voltages or currents, repair, alteration or
defacement, misuse, abuse, neglect, accident, destruction or alteration of the
(1) year from the date of manufacture.
receipt. In the absence of such purchase receipt, the warranty period shall be one
an authorized Service Center must be accompanied by a copy of the purchase
tion, TRANSPORTATION CHARGES PREPAID. Products returned to us or to
installation, use and service, provided the product is returned to Rolls Corpora-
any part which proves defective in material or workmanship under normal
limited to repair or replacement (at our option), during the warranty period of
the purchaser’s receipt.
and service for a period of one (1) year from the date of purchase as shown on
free from defects in materials and workmanship under normal installation, use
LIMITED WARRANTY
IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL,
• Lots of output level, it's loud.
This one-year warranty is in lieu of all expressed warranties,
• Two Headphone Outputs 1/4" and 1/8"
• Mono 1/4" Instrument In with built-in DI
• "Phantom" powering via the Line In
This warranty shall be invalid if the product is damaged as a result of
• Stereo or Mono 1/4" Line Input
• XLR Mic In & Pass Through
ing.
monitor signal together for headphone monitor-
anced instrument signal, and a 1/4" TRS stereo
The PM350 mixes an XLR mic signal, 1/4 unbal-
The obligation of Rolls Corporation under this warranty shall be
This product is warranted to the original consumer purchaser to be
Personal Monitor
LINE
INPUT
PM350 Personal
Monitor Mixer
MONO
STEREO
MIC
THRU
PM350
Mixer
MIC
INPUT
P
ERSONAL
ONITOR
M
PM350
MIXER
INST.
INPUT
INST.
OUTPUT
-
+
132
DC IN
12 VDC
+
-
Salt Lake City, UT
6/01
Rolls Corporation
HEADPHONE
OUTPUTS
LINE
LEVEL
MIC
LEVEL
INST.
LEVEL
PWR
Owners Manual

INTRODUCTION
SPECIFICATIONS
Thank you for your purchase of the PM350 Personal Monitor Mixer. This
unit mixes a microphone signal with a 1/4" unbalanced instrument level
signal and a 1/4" TRS stereo or mono monitor signal.
The PM350 is designed for performers who want to monitor their own
sounds, such as their vocals and instruments, with the main mix via
headphones or earphones. It's very popular with drummers who need to
mix a click track with a monitor signal. Church choir singers love the
PM350 to monitor their voices ov er the musicians.
The PM350 is shipped with an external AC adapter .
INSPECTION
1. Unpac k and inspect the PM350 bo x and pac kage .
If obvious physical damage is noticed, contact the carrier immediately to
make a damage claim. W e suggest sa ving the shipping carton and
packing materials for saf ely transporting the unit in the future.
2. Please complete the Warranty Registration Card and return it to the
factory.
TABLE OF CONTENTS
INTRODUCTION 1
INSPECTION 1
TABLE OF CONTENTS 1
DESCRIPTION 2
CONNECTION 3
OPERATION 4
SCHEMATIC 5
SPECIFICATIONS 6
WARRANTY BACK COVER
Max Input Level: -20 dB XLR, 40 dB Line and Instrument
Inst. Input Impedance: 50K W
Inst. Frequency Response: 50 - 15kHz +/- 3 dB
Output Impedance, Hdphn: 10 9
Output Impedance, Inst.: 600 9
Gain: 15 dB 1/4", 50 dB XLR
Hdphn Freq. Response: 20 - 20 kHz
S/N Ratio: 90 dB
Power: 9 - 18 VDC
Size (W x H x D): 4.5" x 3.3" x 1.5"
Weight: 1 lb (.45 Kg)
1 6

SCHEMATIC
DESCRIPTION
LINE
INPUT
1
Rev:
A
1
J 7
P H O N E 1 / 4
J 8
P H O N E 3 . 5 M M
C 1 0
4 7 U F
1 0
R 1 4
7
C 4
4 7 U F
R 7 1 0
1
4 5 5 6
4
U 1 A
2
3
R 1 8
2 2 K
R 8 2 2 K
R 1 7
2 2 K
P 1
7
C 9 2 7 P F
VCC
P 3
P 1 0 0 K
R 1 6
1 0 K
C 1 2
1 U
T 1
X F M R A U D I O
3
J 1
X L R J A C K M
4 5 6 0
8
U 2 B
6
5
VBIAS
1 2
J 2
P H O N E 1 / 4
R 3
R 2
C 1 3
C 1
C H A N G E 1 K 1 % ' s T O 4 7 K F O R L I N E L E V E L I N P U T
3
J 3
1
4 5 6 0
U 2 A
4 9 . 9 K
2
3
1 K 1 %
R 1
C 1 4
4 7 U
4 7 ' s @ 5 0 V
C 2
4 7 U
X L R J A C K M
1 2
R 1 2
P 1 0 0 K
VBIAS
4
R 4
1 K 1 %
4 9 . 9 K
4 7 U
4 7 U
3
1 2
J 5
VBIAS
2 2 K
VBIAS
X L R F P C
4 5 5 6
8
U 1 B
VCC
6
5
VBIAS
C 1 1 2 7 P F
C 8 2 7 P F
R 9 1 0 0 K
R 1 0
2 2 K
C 6
1 U
5
P 2 B
P 1 0 0 K X 2
P H O N E 1 / 4
J 4
R 1 1
2 2 K
C 5
1 U
2
4 6
1 3
P 2 A
P 1 0 0 K X 2
1
H 1 A
H D 32H 1 B
H D 33H 1 C
H D 3
M O N O
S T E R E O
5968 South 350 West
ROLLS CORPORATION
R 1 3 1 0 0 K
VBIAS
VCC
R 6
1 8 K
C 7
1 0 0 0 U F
D 2
C R 1
1 N 4 0 0 X
D 1
231
J 6
J A P D C
Sheet of
PM350.SCH
Salt Lake City, UT 84107
Document Number:
21-May-2001
Ba
Date:
Title: PERSONAL MONITOR PM350S
Size:
LINE INPUT: 1/4" TRS stereo jack for connection to a line lev el source such
as a mixer monitor/auxiliary output, cassette player output, CD pla y er output
etc.
MIC INPUT: XLR balanced jac k for connection to a condenser or dynamic
R 5
2 2 K
microphone.
MIC THRU: XLR jack paralleled (hard-wired) to the MIC INPUT jack for passthrough to a mixer or other microphone lev el input device.
C 3
4 7 U F
INSTRUMENT INPUT : 1/4" Unbalanced jack for connection to an instrument
to line level signal such as a guitar, keyboard, or instrument preamp output.
INSTRUMENT OUTPUT : Transformer balanced XLR output of the Instrument
L D L G
R 1 5
4 . 7 K
Input.
MONO/STEREO JUMPER: Selects whether the LINE INPUT jac k is mono or
stereo.
1 N 4 0 0 X
"phantom power" the PM350. See the OPERATION section for details.
DC IN 12 VDC: For connection to the external Rolls PS27 power adapter .
HEADPHONE OUTPUTS:1/4" Stereo jack, and 1/8" stereo jack f or connection to stereo headphones or earphones.
LINE LEVEL: Adjusts the le v el of signal from the LINE INPUT to the head-
phone mix.
MIC LEVEL: Adjusts the le v el of signal from the MIC INPUT to the headphone
mix.
INST. LEVEL: Adjusts the level of signal from the INST. INPUT to the head-
MONO
STEREO
HEADPHONE
MIC
THRU
PM350
OUTPUTS
NOTE: When in MONO mode, the ring of the jack may be used to
INPUT
LINE
LEVEL
MIC
INST.
INPUT
P
ERSONAL
ONITOR
M
MIXER
MIC
LEVEL
INST.
OUTPUT
-
+
INST.
LEVEL
132
DC IN
12 VDC
PWR
+
-
phone mix.
25

CONNECTION
OPERATION
The diagram below shows an e xample of ho w to connect the PM350 for
proper operation.
• The LINE INPUT connects to either a 1/4" stereo or mono plug. If this plug is
Tip-Ring-Sleeve stereo and y ou're sending a stereo signal to this jac k, select
the STEREO setting of the Mono/Stereo jumper. If the plug is Tip-Sleev e
mono, select the MONO setting of the Mono/Stereo jumper . The MONO
setting is also the proper selection if you are phantom powering the PM350.
• The MIC INPUT connects to either a dynamic or condenser microphone via
a standard XLR cable. If you are using a condenser type mic, you will need to
power it via phantom power from the mix er which connects to the MIC THRU
jack. This jack will pass the phantom power from a mixer on to the microphone.
• Connect the MIC THRU jack to the mixer or snake as necessary.
• The INSTR UMENT INPUT connects to a guitar, guitar preamp output,
keyboard, or any unbalanced instrument lev el signal.
• The INSTRUMENT OUTPUT is transformer isolated and converts the high
impedance INSTRUMENT INPUT signal to low impedance so it can be sent
down a balanced line. This is then plugged into an XLR input on a mixer or
snake. Note that the level of this signal may be to high for a mixer's microphone input - you may e xperience distortion. In this e v ent, turn down the
instrument connected to
the PM350 INSTRUMENT INPUT, pad the
input to the mixer's mic
input, or trim down the
mic input.
Connect your headphones or earphones to
the proper Headphone
Output.
Make sure the Rolls PS27 12VDC power supply is connected to an active AC
outlet, and all audio connections are in place.
• Setting the Mono/Stereo jumper;
If the input to the LINE INPUT is a Tip-Ring-Slee v e
LINE
INPUT
MIC
THRU
stereo signal, set the Mono/Stereo jumper for stereo
operation as shown here. This is the way the unit
comes from the factory.
If the signal to the LINE INPUT is Tip-Slee ve mono,
move the jumper up to connect the upper two pins.
MONO
STEREO
NOTE: If this jumper is missing, only one side of the
headphones/earphones will work.
HEADPHONE
OUTPUTS
• Phantom Pow ering the PM350
A very useful feature of the PM350 is the ability to send
the 12VDC power to the unit via the LINE INPUT ring
connection. Make sure the Mono/Stereo jumper is in the
MONO position. Connect the 12VDC to the Ring of the
TRS plug as shown here.
ROLLS WILL NOT BE HELD RESPONSIBLE FOR
DAMAGE DONE TO THE PM350 AS A RESULT OF
IMPROPER USE OF THIS FEATURE. IF YOU ARE NOT
SURE HOW TO DO THIS
CORRECTLY, CONTACT A
LINE
INPUT
MIC
THRU
MIC
INPUT
INST.
INPUT
QUALIFIED SERVICE TECHNICIAN.
PM350
LEVEL
LINE
MIC
INPUT
P
M
M
IXER
INST.
INST.
INPUT
OUTPUT
ERSONAL
ONITOR
INST.
MIC
LEVEL
LEVEL
DC IN
12 VDC
PWR
+
-
LINE
INPUT
MONO
STEREO
HEADPHONE
OUTPUTS
MIC
THRU
3 4