MSX48 Owner's Manual v 1.1 CE ©2007 ARX® MSX48 Owner's Manual v 1.1 CE ©2007
ARX®
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Introduction
Thank you for choosing this MSX48 Active Microphone/Line Splitter. As with all ARX
equipment, it has undergone extensive factory calibration and ‘burn in’ before shipping.
To ensure continued trouble free use, please familiarise yourself with the contents of this
manual before using the MSX48.
About the MSX48
The ARX MSX 48 Transformer isolated Microphone/Line Splitter has been developed to
deliver the performance required by the increasing complexity of today’s standards of
audio production.
The MSX 48 is a totally passive device requiring no power, and consists of Sixteen
channels of transformer isolated ultra low noise Microphone/Line Splitter. Each of these
channels has a direct looped Main/FOH feed, as well as a transformer isolated Monitor
split on the front panel.
On the rear panel is an Auxiliary transformer isolated split ideal for use with a remote
recording truck or TV feed. Duplicates of the Monitor and Aux splits are also provided on
two sets of dual 25 pin D sub connectors on the rear panel, wired to Tascam wiring
protocol.
Numbered marker panels on the front and rear provide a space where individual channel
connections can be noted.
The all-steel chassis of the MSX 48 provides strong interference resistant shielding.
Internally, state-of-the-art transformers deliver superb audio quality and total galvanic
isolation.
The MXS 48 is the easy answer to multi channel signal splitting requirements.
Connecting the MSX48
The original signal from the microphone is connected into the Input connector on the
frontpanel of the chosen channel. From there it can go any or all of the following:
1: To the main Front of House console out of the Main connector on the front panel
2: To the Monitor console (or a second Main console) out of the Monitor connector on the front
panel
3: To the rear panel split, for connection to remote trucks, OB vans, recording feeds, press
feeds, etc. The Monitor and Auxiliary feeds are fitted with isolating transformers for complete
signal and galvanic isolation.
The Input connector is hard wired to the Main output connector, so that Phantom power
can be passed through to condenser microphones, DI boxes, and similar items.
Naturally, normal care should be observed when making Phantom powered connections.
To avoid the risk of sudden large noises when plugging in, the console and system levels
should be pulled down.
Duplicates of the Monitor and Aux splits are also provided on two sets of dual 25 pin D
sub connectors on the rear panel, wired to Tascam wiring protocol. Connections should
be made to either the individual XLR connectors or the D sub connector - not both
There is no power to switch on or settings to adjust. The MSX48 is a true Plug and Play
device; simply make the correct connections and it will work.
It really is as straightforward as that!
TheMicrophone/LineSplittershallbeasixteenchannelunitinasteelchassiseightinches(200mm)
deepandthreerackunitshigh.
Eachchannelshallhaveitsinputandtwooutputsonthefrontpanelplusanauxiliaryoutputonthe
rear panel. The Input and the Main outputs shall be hard wired to allow Phantom power to pass
through.TheMonitorandAuxiliarychannelsshallbetransformerisolated.DuplicatesoftheMon-
itorandAuxsplitsshallbeprovidedontwosetsofdual25pinDsubconnectorsontherearpanel,
wiredtotheTascamwiringprotocol.
The Input headroom shall be 300 Ohms, and the frequency response shall be 30 Hz to 20 KHz,
±1dB.Insertionlossshallbe0.5dB@ 1 KHz with a 600Ohmsourceandload.
The Output impedance shall be 600 ohms transformer balanced on the Monitor and Auxiliary
outputs of each channel. The maximum Output level shall be +20dB. Total Harmonic Distortion
shallbe0.2%@ 20dBm, 30 Hz to20KHz.AudioGroundsshallnotbeconnected;Pin1shallbe
floating.
AchassisGroundscrew terminal shall beprovidedonthe rear panel.
TheTransformerBalanced Microphone/LineSplittershall be the ARXMSX48.
Architectural Specifications
