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 interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

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

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AKG Acoustics manual FCC Statement, Introduction, Precautions, WMS 61 and WMS 81 Systems, Receiver
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WMS 61, WMS 81 specifications

AKG Acoustics is renowned for its excellence in audio equipment, and their wireless microphone systems, particularly the WMS 81 and WMS 61, are prime examples of their commitment to quality and innovation. Both models offer a range of features designed to meet the needs of performers and audio professionals alike.

The AKG WMS 81 is a high-end wireless microphone system that excels in versatility and sound quality. It operates in the UHF frequency range, ensuring minimal interference and reliable signal transmission over long distances. One of its standout features is the adaptive diversity receiver, which helps eliminate dropouts and ensures a clear, consistent sound. The WMS 81 also incorporates automatic frequency selection, allowing for quick setup and optimal performance in any environment.

An important characteristic of the WMS 81 is its exceptional audio quality. The system utilizes advanced audio processing technologies, which include high-frequency response and low noise levels. This results in clearer and more articulate sound reproduction, whether for live performances or professional presentations. The microphone capsules are designed to capture a wide dynamic range, making them suitable for vocalists and instrumentalists alike.

On the other hand, the AKG WMS 61 is designed with simplicity and reliability in focus. It offers a more cost-effective solution while still incorporating quality features. Like the WMS 81, it operates in the UHF range and supports automatic frequency pairing, simplifying the setup process. The WMS 61 is known for its lightweight and ergonomic design, making it comfortable for extended use.

In terms of power management, both systems come equipped with innovative battery life indicators. The WMS 61 features a robust rechargeable battery option, ensuring extended performance without the need for frequent replacements. The WMS 81 can accommodate various power options, including alkaline and rechargeable batteries.

Both models also feature a robust metal chassis, ensuring durability in challenging environments, from stages to corporate events. The user-friendly interface provides easy access to essential controls, enabling users to navigate settings effectively.

In summary, the AKG WMS 81 and WMS 61 wireless microphone systems represent a significant advancement in audio technology, combining exceptional sound quality, efficient frequency management, and robust design. Whether you're a professional performer or a corporate presenter, these systems offer reliable solutions that enhance the overall audio experience. With AKG's commitment to quality, both models are sure to meet the demands of any audio environment.
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