1. Introduction
Thank you for selecting a wireless microphone system from AKG.
The WMS 61 and WMS 81 systems are functionally identical.
They provide the same controls and their only difference is the
frequency range. The WMS 61 operates in the VHF range from
138 MHz to 250 MHz, the WMS 81 in the UHF range from
710 MHz to 869 MHz.
Please take a few minutes to read through this Manual. It contains
essential information on how to make optimum use of your equip-
ment. All instructions contained in the Manual refer to both the
WMS 61 and WMS 81 except wehre otherwise noted. All
illustrations show the respective WMS 81 models. Have fun!
2. Precautions
2.1.Spill no liquids on the equipment and do not drop any objects
through the ventilation slots in the equipment.
2.2.Do not place the equipment near heat sources such as radia-
tors, heating ducts, or amplifiers, etc. and do not expose it to
direct sunlight, excessive dust, moisture, rain, mechanical
vibrations, or shock.
2.3.Be sure to dispose of used batteries as required by local
waste disposal rules. Never throw batteries into a fire (risk of
explosion).
3. The WMS 61 and WMS 81 Systems
The WMS 61 and WMS 81 are available in two different con-
figurations:
3.1. Handheld System
1 SR 61 or SR 81 Receiver
1 AC power adapter for 12 VDC/300 mA
1 RMU 60 19” rack mounting kit for 1 or 2 receivers including
one blank panel
1 screwdriver
1 HT 61 or HT 81 Handheld Transmitter
2 AA size 1.5 V dry batteries
1 SA 43 stand adapter
1 adjustable protective ring for controls
3.2. Bodypack System
1 SR 61 or SR 81 Receiver
1 AC power adapter for 12 VDC/300 mA
1 RMU 60 19” rack mounting kit for 1 or 2 receivers including
one blank panel
1 screwdriver
1 PT 61 or PT 81 Bodypack Transmitter
1 belt clip
2 AA size 1.5 V dry batteries
Check that the package contains all the parts listed above for your
system. If anything is missing, please contact your AKG dealer.
3.3. Optional Accessories
PS 61 Power Splitter
for remote antennas and up to four
SR 61 receivers
RA 61 B Booster Antenna
for WMS 61 multichannel
systems
PS 81 Power Splitter
for remote antennas and up to four
SR 81 receivers
RA 81 B Booster Antenna
for WMS 81 multichannel
systems
PSU 01 Central Power Supply Unit
for up to three
power splitters for setting up WMS 61 or WMS 81 multi-
channel systems with up to ten channels
CH 60
plastic carrying case for one complete WMS 61 or
WMS 81 system.
Color Coding Kit
: Set of rings (for the HT 61/HT 81) and
platelets (for ST 61/SR 81 and PT 61/PT 81) in various colors
for identifying the individual channels of a multichannel system.
4. Receiver
The SR 61 is a stationary True Microcontrolled Diversity receiver
for use with WMS 61 transmitters. The SR 61 operates in a sub-
band up to 4 MHz wide of the 138 MHz to 250 MHz VHF
carrier frequency range. The SR 61 can be switched to a maxi-
mum of 15 different carrier frequencies depending on local fre-
quency allocations.
The SR 81 is identical to the SR 61 except that it operates in the
710 MHz to 869 MHz UHF range
FCC Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Parts 74, 15, and 90 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equip-
ment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular instal-
lation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equip-
ment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Shielded cables and I/O cords must be used for this equipment to comply with the relevant FCC regulations.
Changes or modifications not expressly approved in writing by AKG Acoustics may void the user’s authority to operate this equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harm-
ful interf e rence, and (2) this device must accept any interf e rence received, including interf e rence that may cause undesired operation.
