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Stage 412: Quad Handheld Wireless System

1.  Status Indicator - This LED displays the 

operation mode: 
 

GREEN

Normal Operation

RED

Mute

Flashing GREEN

Low Battery

2.  Power/Mute Switch - Press and hold to turn the 

unit on or off. Press and release to mute or 
unmute the transmitter. 

3.  Battery Cover - Unscrew the battery cover 

and slide down to open the VH12 battery 
compartment.

4.  Battery Holder - Open the battery holder by 

pressing the tab and lifting the cover. Insert 
two standard AA (LR6) batteries here, being 
sure to observe the plus and minus polarity 
markings shown.  
WARNING: Do not insert the batteries 
backwards; doing so can cause severe damage 
to the VH12 and will void your warranty.

5.  Input GAIN Control - This control adjusts the 

transmitter input sensitivity. For optimal 
performance, using the included screwdriver, 
set the input GAIN control to where you see 
the VH12 PEAK indicator start to light under 
high levels, then turn down until the PEAK 
light stops lighting. 

6.  IR Lens - This window is used to capture the 

infrared signal sent from the VH12 during 
the IR SET to channelize the transmitter. The 
battery cover must be open and the IR Lens 
facing towards the receiver to load the selected 
channel. 

7.  Plastic Screwdriver - Designed for use in 

adjusting the VH12 input GAIN control (See 
#5 

Input GAIN Control).

VH12 Transmitter Controls and Features

Summary of Contents for STAGE 412

Page 1: ...OWNER S MANUAL ...

Page 2: ...Copyright 2018 Samson Technologies Corp v1 Samson Technologies Corp 278 B Duffy Ave Hicksville NY 11801 www samsontech com ...

Page 3: ...s in the literature accompanying the appliance ATTENTION RISQUE DE CHOC ÉLECTRONIQUE NE PAS OUVRIR If you want to dispose this product do not mix it with general household waste There is a separate collection system for used electronic products in accordance with legislation that requires proper treatment recovery and recycling Private household in the 28 member states of the EU in Switzerland and...

Page 4: ...n a circuit different from that to which the receiver is connected Consult the dealer or an experienced Radio TV technician for help The device has been evaluated to meet general RF exposure requirement To maintain compliance with FCC s RF exposure guidelines this equipment should be installed and operated with a minimum distance of 20cm between the radiator and your body The manufacturer is not r...

Page 5: ...es specified by the manufacturer 12 Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over 13 Unplug the apparatus during lightening storms or when unused for long periods of time 14 Refer all servicing to qualified personnel Service is req...

Page 6: ...re to check out our website www samsontech com for complete information about our full product line We recommend that you record your serial number in the space provided below for future reference Serial number _______________________________ Date of purchase ____________________________ If you have any questions or comments regarding the Stage 412 Wireless System or any other products from Samson...

Page 7: ... Volume Controls This knob sets the level of the audio signal being output through the corresponding receiver output jack on the rear panel Reference level is obtained when the knob is turned fully clockwise to its 10 setting 6 AF Indicators Lights green when the corresponding VH12 transmitter is powered on and there is an audio signal present and detected by the receiver The indicator lights red ...

Page 8: ...ll void your warranty 3 Unbalanced Outputs Use the unbalanced 1 4 jacks to connect the individual SR412 receivers to the line level inputs of a mixer amplifier or other audio equipment 4 CHANNELS A B Mixed Output This balanced low impedance XLR jack carries a mix of both the Channel A and Channel B receivers 5 CHANNELS C D Mixed Output This balanced low impedance XLR jack carries a mix of both the...

Page 9: ... not insert the batteries backwards doing so can cause severe damage to the VH12 and will void your warranty 5 Input GAIN Control This control adjusts the transmitter input sensitivity For optimal performance using the included screwdriver set the input GAIN control to where you see the VH12 PEAK indicator start to light under high levels then turn down until the PEAK light stops lighting 6 IR Len...

Page 10: ...en the receiver and transmitter so that the person using or wearing the transmitter can see the receiver With the SR412 powered off connect the included power adapter Turn the SR412 on momentarily to confirm that the unit is receiving power You ll see the LED displays light up Then turn the SR412 power off With your amplifier or mixer off and volume control all the way down connect the SR412 recei...

Page 11: ...ttery compartment open Turn on the power to the transmitter by pressing and holding Power switch the indicator LED will light green Press the CH A SELECT button on the front of the SR412 to choose an available channel for the CH A receiver The channel number will increase by one digit from 1 6 Once the last channel has been reached the count will cycle back to 1 ...

Page 12: ...R412 receiver Repeat these steps for the remaining transmitters and receivers The four receivers available frequency channels do not overlap so you can set the four receivers to the same channel number Turn on your connected amplifier or mixer but keep the volume all the way down Set the Volume knob on the SR412 fully clockwise to its 10 setting This is unity gain Speak or sing into the microphone...

Page 13: ...ynamic Range 100 dB Maximum Output 1 37 V Sensitivity 100 dBm 30 dB SINAD Output Connectors Two 1 4 6 3 mm unbalanced Three XLR balanced Audio Output Levels 12dB Power Supply 100 240V 50 60Hz 0 4A Output DC 15V 800mA Dimensions 16 92 x 6 7 x 1 57 430 mm x 170 mm x 40 mm Net Weight 3 08 lb 1 4 kg VH12 Transmitter Specifications RF Power Output 10mW Microphone Element Q6 Dynamic Typical Battery Life...

Page 14: ...me frequency To combat this there are several kinds of squelch circuits used by wireless systems The most basic kind called carrier squelch simply sets an RF signal threshold when signals drop below this threshold the audio output is muted Another more advanced design called noise squelch carries out an automatic comparison of the incoming RF signal to a reference voltage generally 200 kHz or high...

Page 15: ...e another Check the receiver and audio input device level controls Distorted Audio Check the receiver output level and audio input device level Check the VH12 s batteries and replace if low Another transmitter may be broadcasting on the same channel Turn off transmitter that may be causing interference Audio Dropout The transmitter may be too far away from the receiver Move closer to the receiver ...

Page 16: ...Samson Technologies 278 B Duffy Ave Hicksville NY 11801 Phone 1 800 3 SAMSON www samsontech com ...

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