PM350b
Personal Monitor
Mixer Plus
LINE
INPUT
MIC
THRU
MIC
INPUT
INST.
IN
LEFT
OUT
RIGHT
OUT
P
ERSONAL
mono
stereo
M
ONITOR
PM350b
DC IN
12 VDC
M
IXER PLUS
+
-
HEADPHONE
OUTPUTS
LINE
LEVEL
MIC
LEVEL
INST.
LEVEL
PWR
Owners Manual
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DESCRIPTION
SCHEMATIC
LINE INPUT: 1/4" TRS stereo jack for connection to a line level source such as a
mixer monitor/auxiliary output, cassette player output, CD player output etc.
ground lift: Header jumper for disconnecting chassis ground from pin 1 of the Mic
Input and Mic Thru.
MIC THRU: XLR jack paralleled (hard-wired) to the MIC INPUT jack for pass-through
to a mixer or other microphone level input device.
MIC INPUT: XLR balanced jack for connection to a condenser or dynamic micro-
phone.
INSTRUMENT INPUT: 1/4" TRS stereo jack for connection to an instrument or line
level signal such as a guitar processor, keyboard, or instrument preamp output.
MONO/STEREO JUMPER: Selects whether the INST. INPUT jack is mono or stereo.
LEFT/RIGHT OUTPUTs: Electronically balanced 1/4" TRS outputs of the Instrument
Input.
ground lift: Header jumper for disconnecting chassis ground from the 1/4" TRS
instrument output jacks.
MONO/STEREO JUMPER (Located below the LINE INPUT): Selects whether the
LINE INPUT jack is mono or stereo. NOTE: When in MONO mode, the ring of the jack
may be used to "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 for connection to
stereo headphones or earphones.
LINE LEVEL: Adjusts the level of signal from the LINE INPUT to the headphone mix.
MIC LEVEL: Adjusts the level of signal from the MIC INPUT to the headphone mix.
INST. LEVEL: Adjusts the level of signal from the INST. INPUT to the headphone mix.
LINE
INPUT
MIC
THRU
MIC
INPUT
INST.
IN
LEFT
OUT
RIGHT
OUT
P
ERSONAL
mono
stereo
M
ONITOR
PM350b
DC IN
12 VDC
M
IXER PLUS
+
-
HEADPHONE
OUTPUTS
LINE
LEVEL
MIC
LEVEL
INST.
LEVEL
PWR
5
2
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OPERATION
CONNECTION
Make sure the Rolls PS27 12VDC power supply is connected to an active AC
outlet, and all audio connections are in place.
The diagram below shows an example of how to connect the PM350b 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 you're sending a stereo signal to this jack, select
the STEREO setting of the Mono/Stereo jumper. If the plug is Tip-Sleeve
mono, select the MONO setting of the Mono/Stereo jumper.The MONO
setting is also the proper selection if you are phantom powering the PM350b.
LINE
INPUT
MIC
THRU
• Setting the Mono/Stereo jumpers;
If the input to the LINE INPUT or INSTRUMENT
INPUT is a Tip-Ring-Sleeve stereo signal, set the
Mono/Stereo jumper for stereo operation as shown
here.
• 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 mixer which connects to the MIC THRU
jack. This jack will pass the phantom power from a mixer on to the micro-
phone.
• Connect the MIC THRU jack to the mixer or snake as necessary.
• The INSTRUMENT INPUT connects to a guitar preamp output, keyboard, or
any stereo or mono instrument level signal. Again, selecte stereo or mono.
• The INSTRUMENT OUTPUTs are electronically isolated and converts the
high impedance INSTRUMENT INPUT signal to low impedance so it can be
sent down a balanced line.These signals may then be plugged into an XLR
input on a mixer or snake by using a 1/4" TRS to XLR cable. Note that the
level of this signal may be too high for a mixer's microphone input - you may
experience distortion. In this
If the signal to the LINE INPUT or INSTRUMENT
INPUT is Tip-Sleeve mono, move the jumper to
connect the "mono" pins.
NOTE: If the LINE INPUT mono/stereo jumper is
missing, only one side of the headphones/earphones
will work.
MONO
STEREO
HEADPHONE
OUTPUTS
• Phantom Powering the PM350b
A very useful feature of the PM350b 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.
event, turn down the instrument
connected to the PM350 IN-
ROLLS WILL NOT BE HELD RESPONSIBLE FOR
DAMAGE DONE TO THE PM350 AS A RESULT OF
IMPROPER USE OF THIS
STRUMENT INPUT, pad the
input to the mixer's mic input, or
trim down the mic
FEATURE. IF YOU ARE NOT
input.
LINE
INPUT
SURE HOW TO DO THIS
MIC
THRU
MIC
INPUT
INST.
INPUT
CORRECTLY, CONTACT A
QUALIFIED SERVICE TECH-
NICIAN.
Connect your head-
phones or earphones
to the proper Head-
phone Output.
LINE
INPUT
MIC
THRU
MIC
INPUT
INST.
IN
LEFT
OUT
RIGHT
OUT
NOTE:This unit cannot be
powered by standard 48 Volt
Phantom Power supplied by
mixers, phantom power adapters etc.The current (amperes) is insufficient to
power the PM350b. Also, any voltage greater than 16 VDC will damage the unit.
P
ERSONAL
mono
stereo
M
ONITOR
PM350b
DC IN
MIXER PLUS
GROUND LIFT
12 VDC
+
-
The Mic Input and Mic Thru have a ground lift jumper provided to lift the XLR
pin 1 from chassis ground. The 1/4" TRS Instrument Outputs also have this
feature. If you experience a "hum" on the microphone or instrument outputs,
lifting the ground may elliminate the problem.To lift the ground, use a pair of
needle-nose pliers and carefully remove the header jumper. Replace the
jumper on the two pins labled "lift".
HEADPHONE
OUTPUTS
LINE
LEVEL
MIC
LEVEL
INST.
LEVEL
PWR
3
4
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