Rolls MS20c User manual

OWNERS MANUAL
MS20
c
Splitter
Combiner
Isolator
Rolls Corporation
Salt Lake City, UT
4/06
MS20b
Splitter Combiner Isolator
• Splits balanced XLR input, or 1/8" input to two balanced XLR
outputs
• Combines two balanced XLR signals to one XLR output.
NOTE: Will only pass phantom power to one microphone.
• One signal is transformer isolated from the other.
• Ground Lift switch for noise elimination
• The MS20c 1/8" (3.5mm) Input is a balanced TRS input.
This Input, however, may
be connected to an unbalanced signal source (Tip-Sleeve) such as a mixer output or
line-level instrument output, and the MS20c balanced outputs connected to a snake
or mixer's balanced input. NOTE: The
Ring of the 1/8" jack MUST be connected to
the Sleeve, and the
bottom XLR Output jack will have it's pin 3 grounded.
• The 1/8" jack may also be used as an unbalanced
output
output
. Connect a balanced signal
to the top XLR Input, the 1/8" jack may be connected via a Tip-Sleeve jack to an
unbalanced input.
• By referring to the diagram on the top of the MS20c, you can identify the signal
and grounding paths for all the jacks.
MS20c 1/8" (3.5mm) jack

Thank you for your purchase of the MS20c Splitter, Combiner, and bal-
anced signal Isolator.
This versatile unit will split a single balanced XLR signal into two isolated
signals, combine two balanced XLR signals, along with a 1/8" (3.5mm)
TRS signal together into a single output, or simply isolate a balanced line
for buzz or hum elimination.
INSPECTION
1. Unpack and Inspect the MS20c package
Your MS20c was carefully packed at the factory in a protective carton.
Nonetheless, be sure to examine the unit and the carton for any signs
of damage that may have occurred during shipping. If obvious physical
damage is noticed, contact the carrier immediately to make a damage
claim. We suggest saving the shipping carton and packing materials for
safely transporting the unit in the future.
2. For warranty information, visit our website at
www.rolls.com
, and
click on the REGISTER YOUR WARRANTY HERE text. If you are un-
able to register online, please complete the Warranty Registration Card
and return it to the factory.
DESCRIPTION
INPUT: 2 Female XLR jacks, and 1 1/8" (3.5mm) TRS jack for connection
to the microphone or other signals to be split/combined.
IMPORTANT NOTICE: THE 1/8" JACK IS
NOT
A STEREO INPUT, IT
IS A BALANCED INPUT. PLUGGING A STEREO SIGNAL INTO THIS
JACK WILL RESULT IN A DIMINISHED OUTPUT LEVEL.
OUTPUT: 2 Male XLR jacks for connection to a mixing console or signal
processing devices.
GROUND LIFT: Switch when in "GROUND" position, indicates that pins
1 of the INPUT and OUTPUT jacks are connected. In the "LIFT" position,
the ground pins have been separated.
OPERATION
Shown below are some examples of how to connect your MS20c.
SPECIFICATIONS
Input Impedance: XLR: 600
Ω
1/8
" (3.5mm)
: 10K
Ω
Output Impedance: 600
Ω
Frequency Response: 35 Hz - 20 kHz
Max Level: +26 dBm
Dimensions: 3 x 2.25 x 1.2 inches
Weight: 10 Ounces
Here the MS20c is
connected as a mic
combiner.
NOTE: PHANTOM
POWER IS PASSED TO
ONLY ONE
MICROPHONE.
To transformer isolate a balanced signal, connect the cable with
the signal to be isolated to the INPUT, and the mixer or next de-
vice to the OUTPUT.
Here is an example of the
Here is an example of the
MS20c connected as a mic
MS20c connected as a mic
splitter.
splitter.