Kramer Electronics Music Mixer 102 mx User Manual
KRAMER ELECTRONICS LTD.  
USER MANUAL  
MODEL:  
102MX  
2 Channel Audio Mixer  
P/N: 2900-901020 Rev 2  
 
Contents  
1
Introduction  
1
2
2.1  
2.2  
Getting Started  
Achieving the Best Performance  
Recycling Kramer Products  
2
2
3
3
Overview  
4
3.1  
Defining the 102MX 2 Channel Audio Mixer  
4
4
Connecting the 102MX  
6
5
Operating the 102MX  
Choosing the Microphone Type  
Using a Microphone  
Using the Talk-Over Function  
Using the Volume Controls  
7
7
7
7
7
5.1  
5.2  
5.3  
5.4  
6
Technical Specifications  
8
Figures  
Figure 1: 102MX 2 Channel Audio Mixer  
Figure 2: Connecting the 102MX 2 Channel Audio Mixer  
5
6
102MX – Contents  
i
 
1
Introduction  
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been  
providing a world of unique, creative, and affordable solutions to the vast range of  
problems that confront video, audio, presentation, and broadcasting professionals  
on a daily basis. In recent years, we have redesigned and upgraded most of our  
line, making the best even better!  
Our 1,000-plus different models now appear in 11 groups that are clearly defined  
by function: GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Routers;  
GROUP 3: Control Systems; GROUP 4: Format/Standards Converters; GROUP 5:  
Range Extenders and Repeaters; GROUP 6: Specialty AV; GROUP 7: Scan  
Converters and Scalers; GROUP 8: Cables and Connectors; GROUP 9: Room  
Connectivity; GROUP 10: Accessories and Rack Adapters and GROUP 11: Sierra.  
Congratulations on purchasing your Kramer 102MX 2 Channel Audio Mixer, which  
is ideal for the following typical applications:  
•
•
Small audio studio applications  
Presentation applications for microphone/line mixing simultaneously  
102MX - Introduction  
1
 
 
2
Getting Started  
We recommend that you:  
•
Unpack the equipment carefully and save the original box and packaging  
materials for possible future shipment  
•
•
Review the contents of this user manual  
Use Kramer high-performance, high-resolution cables  
Go to http://www.kramerelectronics.com to check for up-to-date  
user manuals, application programs, and to check if firmware  
upgrades are available (where appropriate).  
i
2.1  
Achieving the Best Performance  
To achieve the best performance:  
•
Use only good quality connection cables to avoid interference, deterioration  
in signal quality due to poor matching, and elevated noise levels (often  
associated with low quality cables)  
•
•
Do not secure the cables in tight bundles or roll the slack into tight coils  
Avoid interference from neighboring electrical appliances that may adversely  
influence signal quality  
•
Position your Kramer 102MX away from moisture, excessive sunlight and  
dust  
Caution:  
No operator serviceable parts inside the unit  
!
Warning: Use only the Kramer Electronics input power wall  
adapter that is provided with the unit  
Warning: Disconnect the power and unplug the unit from the wall  
before installing  
2
102MX - Getting Started  
 
   
2.2  
Recycling Kramer Products  
The Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC  
aims to reduce the amount of WEEE sent for disposal to landfill or incineration by  
requiring it to be collected and recycled. To comply with the WEEE Directive,  
Kramer Electronics has made arrangements with the European Advanced  
Recycling Network (EARN) and will cover any costs of treatment, recycling and  
recovery of waste Kramer Electronics branded equipment on arrival at the EARN  
facility. For details of Kramer’s recycling arrangements in your particular country  
go to our recycling pages at http://www.kramerelectronics.com/support/recycling/.  
102MX - Getting Started  
3
 
 
3
Overview  
The 102MX is a high−performance 2 channel stereo audio mixer for line level and  
mic level audio signals. It mixes one line level input with either a microphone or a  
second line level input and produces a mixed audio output signal.  
The 102MX features:  
•
•
A selectable microphone input – dynamic or condenser  
A user-enabled talk-over function that mutes the line input when the mic  
detects sound  
•
•
•
Three volume controls – Mic/Line Level, Line 2 Level, Master Level  
A 12V DC power supply, included  
3 units can be rack mounted side−by−side in a 1U rack space with the  
optional RK−3T rack adapter  
3.1  
Defining the 102MX 2 Channel Audio Mixer  
This section defines the 102MX.  
4
102MX - Overview  
 
   
Figure 1: 102MX 2 Channel Audio Mixer  
#
Feature  
Function  
1
LINE OUT (L, R) RCA Connectors  
Connect to the right and left channels of a line  
level stereo audio acceptor  
2
LINE 2 IN (L, R) RCA Connectors  
Connect to the right and left channels of a line  
level stereo audio source  
3
4
TALK OVER Button  
Press to activate the talk-over function  
MIC SELECT Button  
Press to select the Input 1 mic level signal,  
release to select Input 1 line level signal  
5
COND. MIC Button  
Press for a powered condenser mic, release for  
an unpowered dynamic mic  
6
7
8
9
MIC/LINE 1 IN 6mm Socket  
MASTER LEVEL Knob  
LINE 2 LEVEL Knob  
Connects to a mic or line level source  
Controls the mixed signal output level  
Controls the line 2 input level  
MIC/LINE1 LEVEL Knob  
Controls the mic/line 1 input level and talk-over  
sensitivity  
10 ON LED  
Illuminates when the unit is ON  
11 12V DC Connector  
Connects to the 12V DC power supply  
102MX - Overview  
5
 
 
4
Connecting the 102MX  
Always switch off the power to each device before connecting it to your  
102MX. After connecting your 102MX, connect its power and then  
i
switch on the power to each device.  
To connect the 102MX as illustrated in the example in Figure 2:  
1. Connect a mic or line source to Mic/Line IN 1.  
2. Connect a stereo audio source to Line 2 IN (such as a stereo audio player).  
3. Connect Line OUT to a stereo audio acceptor (such as a stereo audio  
recorder).  
4. Connect the 12V DC power supply to the 102MX 12V DC socket and plug  
the power supply into the mains electricity. The ON LED lights.  
The power supply is not shown in Figure 2.  
i
Figure 2: Connecting the 102MX 2 Channel Audio Mixer  
6
102MX - Connecting the 102MX  
 
   
5
Operating the 102MX  
This section explains how to operate the 102MX.  
5.1  
Choosing the Microphone Type  
•
When using a powered condenser microphone, press in the COND MIC.  
button  
•
When using an unpowered dynamic mic, release the COND MIC. button  
5.2  
5.3  
Using a Microphone  
•
If you are using a microphone on MIC/LINE 1 IN, press in the MIC SELECT  
button to select the mic input  
Using the Talk-Over Function  
•
To use the talk-over function, press in the TALK OVER button  
The 102MX automatically inserts the mic signal and fades the source of  
LINE 2 IN. The unit becomes a fader instead of a mixer  
5.4  
Using the Volume Controls  
•
•
•
Adjust the volume of the mic or line 1 input with the MIC/LINE 1 LEVEL knob  
Adjust the volume of the line 2 input with the LINE 2 LEVEL knob  
Adjust the volume of the mixed output with the MASTER LEVEL knob  
102MX - Operating the 102MX  
7
 
         
6
Technical Specifications  
INPUTS:  
Mic/line 1: 10mV/1.6kΩ, 1Vpp/10kΩ, on 6.5mm phone  
connector; Line 2: 1Vpp/10kΩ, stereo on RCA connectors  
OUTPUTS:  
Line level, stereo, up to 5.6Vpp/150Ω on RCA connectors  
BANDWIDTH (-3dB):  
GAIN RANGE:  
DIFF. PHASE:  
S/N RATIO:  
100kHz  
−12dB to 68.5dB (mic); −12dB to +8.8dB (line)  
0.05Deg.  
69dB  
CONTROL:  
Mic/line 1 level, line 2 level, master level rotary controls,  
condenser/dynamic mic, line/mic, talkover selection switches  
AUDIO THD+NOISE:  
2nd HARMONIC:  
0.018%  
0.002%  
POWER CONSUMPTION:  
12V DC, 40mA  
0° to +40°C (32° to 104°F)  
OPERATING  
TEMPERATURE:  
STORAGE TEMPERATURE:  
HUMIDITY:  
-40° to +70°C (-40° to 158°F)  
10% to 90%, RHL non-condensing  
12cm x 7.5cm x 2.5cm (4.7” x 2.95” x 0.98”) W, D, H.  
0.25kg (0.55lbs) approx.  
DIMENSIONS:  
WEIGHT:  
ACCESSORIES:  
OPTIONS:  
Power supply, mounting bracket  
RK−3T 19” rack adapter  
Specifications are subject to change without notice at http://www.kramerelectronics.com  
8
102MX - Technical Specifications  
 
 
 
For the latest information on our 102MX and a list of Kramer distributors,  
visit our Web site where updates to this user manual may be found.  
We welcome your questions, comments, and feedback.  
Web site: www.kramerelectronics.com  
E-mail: [email protected]  
SAFETY WARNING  
Disconnect the unit from the power  
supply before opening and servicing  
!
P/N:  
Rev:  
2900-901020  
2
 

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