Rolls Music Mixer PM350B User Guide

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  
 
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
 
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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