LA Audio Electronic Microphone MS1224 User Manual

PRODUCT OVERVIEW  
Main Features:  
12 Channel 1 into 4 (12 into 48) Active Mic Splitter  
Unique Input & Output configuration options  
Unity Gain signal path for ease of set-up  
Drives long cable runs without level loss  
Compact design, 48 channel System in 13U  
Channel Monitoring facility  
Individual input and Output group earth lift switches  
The MS1224 is a 12 channel, 1 into 4 Unity Gain Active Microphone Splitter designed for applications  
where multiple feeds are required from one set of microphones without the signal degradation  
experienced with passive splitting solutions. The Unity Gain design principle combined with excellent line  
driving ability ensures that unity levels are delivered at the end of each feed, even over considerable  
distance, thereby saving time in recalibrating levels.  
Each of the MS1224's channels has four independently buffered, transformer balanced outputs and a fifth  
dedicated parallel Link output. The Link output may be used to provide a direct, non active feed, for  
instance to the FOH console, or it can be used to daisy chain adjacent channels to provide more output  
feeds from a single microphone, for instance for Press Box applications. The inputs are electronically  
balanced with a Pad switch for connection of line level signals. Switchable Phantom Power is provided  
with a Phantom Presence LED.  
The MS1224 incorporates a channel monitoring circuit, which is accessed on the PSU unit. Each channel  
has a Listen button that connects it momentarily both to an LED bargraph and headphone socket on the  
PSU front panel. The headphone monitor circuit incorporates a dynamics enhancement and protection  
system. This controls the dynamics of the signal in a way that amplifies very low background levels whilst  
limiting high signal levels. This enables monitoring of microphone function during set up without the need  
of a vocalist being present on the mic. It also provides user protection against sudden loud signals.  
A unique design feature of the MS1224 is the option to configure the way that Input and Output  
connectors are presented on the front and rear of the unit. As each customer has their own views on this  
we have given the flexibility of presenting the Input and two Outputs on the front and three Outputs on the  
rear, or vice-versa. In addition the Output designated as Link can be positioned either below the Input  
connector, or the top connector of the group of three Outputs. Thereby giving four possible permutations.  
The required configuration can be specified ex-works or simply reconfigured at a later stage.  
A
U
D
I
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In keeping with our policy of continuous improvement LA Audio reserves the right to alter specifications without prior notice.  
Manufactured in the UK by LA Audio, 1 Stable Court, Herriard Park, Hants RG25 2PL.  
British  
Tel: +44 (0)1256 381944 Fax: +44 (0)1256 381906 Web: www.laaudio.co.uk. email: [email protected]  
Originals  
 
ARCHITECTS & ENGINEERS SPECIFICATIONS  
The Microphone Splitter shall be an active Unity Gain design offering 12 channels of 1 into 4 signal splitting. All  
four main feeds shall be fully floating transformer balanced. A dedicated direct Link output shall also be provided.  
Each channel shall incorporate switchable Phantom Power with a Phantom Presence LED, and a Pad switch  
shall provide 20dB of attenuation for Line level compatibility. A monitor switch on each channel shall provide  
monitoring of the input signal via the Power Supply Unit which shall output both an audio signal via a headphones  
socket and visual indication via a 10 segment LED bargraph.  
Access to the Input, Link and four Outputs shall be facilitated on interchangeable front and rear panel XLR  
connectors. The Microphone Splitter shall be expandable by daisy chaining and shall be externally powered by  
PSU's capable of power sharing. The Microphone Splitter shall be the LA Audio MS1224.  
DIMENSIONS  
PHANTOM  
PHANTOM  
PHANTOM  
PHANTOM  
PHANTOM  
PHANTOM  
PHANTOM  
PHANTOM  
PHANTOM  
PHANTOM  
PHANTOM  
PHANTOM  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
48V  
48V  
48V  
48V  
48V  
48V  
48V  
48V  
48V  
48V  
48V  
48V  
PAD  
PAD  
PAD  
PAD  
PAD  
PAD  
PAD  
PAD  
PAD  
PAD  
PAD  
PAD  
0dB  
20dB  
0dB  
20dB  
0dB  
20dB  
0dB  
20dB  
0dB  
20dB  
0dB  
20dB  
0dB  
20dB  
0dB  
20dB  
0dB  
20dB  
0dB  
20dB  
0dB  
20dB  
0dB  
20dB  
LISTEN  
LISTEN  
LISTEN  
LISTEN  
LISTEN  
LISTEN  
LISTEN  
LISTEN  
LISTEN  
LISTEN  
LISTEN  
LISTEN  
1
2
3
4
5
6
7
8
9
10  
11  
12  
Active Mic  
Splitter  
A
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483.0  
GROUNDING  
DC SUPPLIES  
MONITORING  
POWER  
LEVEL  
PHONES  
4
INPUTS  
1A  
OUTPUT A  
1A  
OUTPUT B  
1A  
OUTPUT C  
1A  
6
F
F
F
F
LIFT  
LIFT  
LIFT  
LIFT  
2
8
POWER SUPPLY  
A
U
D
I
O
+48V  
-
+
-60  
-40  
-20  
0dB  
+20  
FUSE  
FUSE  
FUSE  
FUSE  
0
10  
dB  
GROUND  
GROUND  
GROUND  
GROUND  
225.0  
MS1224  
PSU  
133.0  
44.0  
POWER IN  
POWER OUT  
SERIAL NUMBER  
MADE IN THE UK BY LA AUDIO - AN SCV INTERNATIONAL GROUP COMPANY  
442.0  
AVIS  
CAUTION  
RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
INTERVENTION SEULMENT PAR PERSONNEL QUALIFIE  
FUSE:  
230V T100mA  
REFER SERVICING TO QUALIFIED PERSONNEL  
TO REDUCE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE  
THIS UNIT MUST BE EARTHED  
230V  
50Hz 90VA  
MADE IN THE UK BY LA AUDIO  
A
U
D
I
O
In keeping with our policy of continuous improvement LA Audio reserves the right to alter specifications without prior notice.  
Manufactured in the UK by LA Audio, 1 Stable Court, Herriard Park, Hants RG25 2PL.  
British  
Tel: +44 (0)1256 381944 Fax: +44 (0)1256 381906 Web: www.laaudio.co.uk. email: [email protected]  
Originals  
 

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