M A D E I N C H I N A
Due to continuous product development, please ensure that you have downloaded
the latest instruction manual for this product from the Kam website at www.kam.co.uk
M A N U A L V E R S I O N 1 . 0
0 1 / 0 6 / 1 2
For the latest updates and information on the entire Kam range visit:
www.kam.co.uk
Kam products are manufactured by: Lamba plc, Unit 1, Southfields Road, Dunstable, Bedfordshire, United Kingdom LU6 3EJ
Telephone: (+44) (0)1582 690600 • Fax: (+44) (0)1582 690400 • Email: mail@lambaplc.com • Web: www.lambaplc.com
Due to continuous product development, specifications and appearance are subject to change. © Copyright Lamba plc 2012. E&OE.
KWM1935/KWM1940
UHF wireless microphone systems
Thank you for purchasing this Kam product, we are sure that it will serve you for many years to come.
To optimise the performance of this product, please read these operating instructions carefully to familiarise
yourself with the basic operations of this unit. Please retain them for future reference.This unit has been tested at
the factory before being shipped to you.
To prevent or reduce the risk of electrical shock or fire, do not expose the unit to rain or moisture. To prevent a fire
hazard, do not expose the unit to any naked flame sources. Unplug this apparatus during lightning storms or if it is
unlikely to be used for long periods of time.
When installing the unit, please ensure you leave enough space around the unit for ventilation. Slots and openings
in the unit are provided for ventilation to ensure reliable operation of the product and to protect it from overheating.
To prevent fire hazard, the openings should never be blocked or covered.
If the unit is powered by the mains, always handle the power cable by the plug. Never pull out the plug by pulling
on the cable. Never touch the power cable when your hands are wet as this could cause an electric shock. Do not
tie a knot in the cable. The power cable should be placed such that it is not likely to be stepped on. A damaged
power cable can cause a fire or give you an electrical shock. Checkthe power cord periodicaly, if you ever find that
it is damaged, replace it before using the unit again. Contact your retailer for a replacement.
The voltage of the available power supply differs according to country or region. Be sure that the power supply
voltage of the area where this unit is to be used meets the required written on the unit.
The lightning flash symbol inside a triangle is to alert the user to the presence high voltage within the
unit’s enclosure that may be of sufficient power to constitute a risk of electrical shock to persons.
Caution: to prevent the risk of electric shock, do not attempt to open the unit. No user-serviceable parts
inside. Refer all servicing to qualified service personnel.
The exclamation mark inside a triangle is intended to alert the user to the presence of important operating
and maintenance instructions in the literature accompanying the appliance.
Select the installation location of your unit carefully. Avoid placing it in direct sunlight or locations subject to
vibration and excessive dust. Do not use the unit where there are extremes in temperature (below 41ºF / 5ºC or
exceeding 95ºF / 35ºC).
Unpacking and safety Please unpack your new product carefully. Your new product should reach you in perfect
condition. Please check that no damage has occurred during transit. If any damage is found, do not operate your
unit. Please contact the retailer you purchased it from immediately. If there is any damage to the mains cable do
not use the device. Always disconnect the unit from the mains supply when carrying out any cleaning of the unit.
Manufacturer declarations
In compliance with the following requirements: RoHS Directive (2002/95/EU) and WEEE Directive (2002/96/EU).
If this product is ever no longer functional please take it to a recycling plant for environmentally friendly disposal.
CE declaration of conformity
R&TTE Directive (1999/5/EU), EMC Directive (2004/108/EU), Low Voltage Directive (2006/95/EU).
The declarations are available on application from certif[email protected]om
Before putting the devices into operation, please observe the respective country-specific regulations.
KWM1935 - front panel
1. Power switch
2. Channel selector panel (see below for channel selection instructions)
3. Power status LED
4. RF signal indicator led - lights when the receiver is receiving a signal from the transmitter.
5. Volume control
KWM1935 - rear panel
6. Power inlet
7. Squelch sensitivity adjust. The squelch circuit automatically mutes the audio signal if momentary signal loss
occurs.
8. Unbalanced audio output
9. Balanced XLR audio output
KWM1940 – front panel
1. Power switch
2. Channel selector panel (see below for channel selection instructions)
3. Power status LED
4. Channel A RF signal indicator LED – lights when the receiver is receiving a signal from the transmitter.
5. Channel B RF signal indicator LED – lights when the receiver is receiving a signal from the transmitter.
6. Mic A volume control
7. Mic B volume control
KWM1940 – rear panel
8. Power inlet
9. Channel A squelch sensitivity adjust. the squelch circuit automatically mutes the audio signal if momentary
signal loss occurs.
10. Channel B squelch sensitivity adjust.
11. Unbalanced combined audio output - outputs the combined audio signal from both microphones.
12. Channel A balanced XLR audio output.
13. Channel B balanced XLR audio output.
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Microphone transmitter(s)
Power on / off / standby switch
Low battery indicator LED - when continuously lit you have approximately one hour left of useful operation. Ideally
change the battery when lit.
Battery cover & AAA alkaline batteries - provide power to the microphone transmitter. Typical battery life is 20
hours. IMPORTANT: use alkaline batteries only, carbon-zinc and zinc-chloride batteries will not provide adequate
power and are not recommended.
Channel select switch panel - remove this cover to access the channel selection dip switches (see below for
channel selection instructions).
Using the KWM1935 wireless receiver
1. Connect output to your mixer/amplifier, using either a balanced XLR cable or an unbalanced, single conductor
1/4 inch jack plug cable.
2. Connect the AC adapter to the receiver and plug into an appropriate power outlet.
Using the KWM1940 wireless receiver
1. Connect outputs for channel A & B to your mixer/amplifier, either two balanced XLR cables for dual output or
a single unbalanced 1/4 inch jack plug cable for mixed output of both channels.
2. Connect the AC adapter to the receiver and plug into an appropriate power outlet.
Using the wireless microphone transmitter(s)
1. Slide the mic ON/OFF/STANDBY switch to the ON position.
2. Check the signal indicator is lit on your receiver to see if the radio signal is being received.
3. If the signal indicator is lit, begin singing or speaking.
4. During the performance, slide the ON/OFF/STANDBY switch to the STANDBY position when the mic is not
being used.
5. When the performance is over, slide the ON/OFF/STANDBY switch to the OFF position to conserve battery
power.
Setting the frequency selection system
It is important to ensure that the transmitter(s) and receiver are set to operate using the same basic frequency.
There are 16 channels available and each channel has a specific frequency factory assigned to it. Both the
KWM1935 & KWM1940 use the same 16 frequencies. The table below shows the 16 different channels, the
frequencies assigned to those channels and the various DIP switch settings used to choose a particular channel.
Set the transmitter channel
1. Open the channel select switch panel.
2. Choose a channel you wish to use.
3. Set the DIP switch according to the channel/frequency table.
When using the KWM1940 you will need to choose and set different channels for each transmitter when using both
microphones.
Set the receiver channel
KWM1935
1. Open the channel select switch panel.
2. Choose a channel you wish to use.
3. Set the DIP switch according to the channel/frequency table.
KWM1940
1. Open the channel select switch panel.
2. Choose the channels you wish to use.
3. Set the DIP switches for channels A & B according to the channel/frequency table.
Channel/frequency table
Channel 1
863.00MHz
Channel 2
863.40MHz
1 2 3 4
1 2 3 4
Channel 3
863.80MHz
Channel 4
864.20MHz
1 2 3 4
1 2 3 4
Channel 5
864.60MHz
Channel 6
863.20MHz
1 2 3 4
1 2 3 4
Channel 7
863.60MHz
Channel 8
864.00MHz
1 2 3 4
1 2 3 4
Channel 9
864.40MHz
Channel 10
864.80MHz
1 2 3 4
1 2 3 4
Channel 11
863.10MHz
Channel 12
863.30MHz
1 2 3 4
1 2 3 4
Channel 13
863.50MHz
Channel 14
863.70MHz
1 2 3 4
1 2 3 4
Channel 15
864.90MHz
Channel 16
865.00MHz
1 2 3 4
1 2 3 4
NOTE - when using two microphones with the KWM1940 it is important to select two frequencies which are more
than 0.5Mhz apart to avoid interference between the two transmitters.
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