AKG Acoustics WMS61, WMS81 manual PT81 bodypack transmitter

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Specifications

PT81 bodypack transmitter:

Audio bandwidth:

50 Hz to 20 kHz

Modulation method:

FM

Radiated RF power:

10 mW

Frequency stability:

±10 ppm

Antenna:

Flexible, quarter-wave wire

Rated deviation:

±30 kHz

Signal-to-noise ratio:

Typical 50 dB (A weighted)

Input impedance:

220 kohms, 600 pF

Audio input:

Mini 3-pin XLR; 1400 mV for

 

rated deviation at 1 kHz

Phantom powering:

Pin 3: 6 V/6k8 ohms

Current consumption:

170 mA/2.4 V

Power requirement:

2 AA 1.5V batteries

Battery life:

>8 hours

Dimensions:

3.62 x 2.56 x 0.79 in.

 

(92 x 65 x 20 mm)

Net weight:

3.04 oz. (76 g) without batteries

HT81 handheld transmitter:

Type, bandwidth and polar pattern:

 

See individual microphone

 

specification sheets

Modulation type:

FM

RF radiated power:

10 mW

Rated deviation:

±30 kHz

Signal-to-noise ratio:

Typical 50 dB (A-weighted)

Current consumption:

<150 mA/2.4 V

Power requirement:

2 AA size 1.5V batteries

Battery life:

>10 hours

Dimensions:

1.4 x 9.4 in dia. (36 mm x 240 mm)

Net weight:

9.8 oz. (245 g)

SR81 receiver:

Receiver type:

Diversity

Antenna inputs:

2 x 50-ohm BNC sockets

Modulation type:

FM

Input sensitivity:

Typical -95 dBm

Squelch threshold:

Automatic, using pilot tone (32.678 kHz)

Audio bandwidth:

50 to 20 kHz

THD at 1 kHz:

<0.4% at rated deviation

Signal-to-noise

Typical 100 dB (A-weighted)

Audio output:

Balanced XLR-M, mic/line level

 

switchable, typical 30 dB unbalanced:

 

1.4” jack: 0 dBm XLR: 6 dBm

Current consumption:

220 mA typical

Power requirement:

11 to 15 V dc or ac from

 

external power supply

Dimensions:

8.27 x 6.7 x 1.65 in.

 

(210 x 170 x 42 mm)

Net weight:

18.8 oz. (470 g)

Accessories:

PS81:

Active, wideband antenna splitter for

 

connecting up to 4 SR81 units or 3

 

SR81 units and one additional PS.

RA81B:

External receiver antenna with

 

integrated booster, powered via cable

 

from the PS61 antenna splitter.

PSU01:

Central power supply unit for PS61 and

 

PS81 splitters.

SRA-1:

External directional antenna

CCS-1:

Color code indicators for easy channel

 

recognition.

Hard Case CH60:

For carrying a single complete system

UAM1:

Universal antenna mount for moving

 

the antennas for 1 receiver to the front

 

of the rack.

AKG Acoustics, U.S. • 1449 Donelson Pike • Nashville • TN 37217 • Tel: (615) 360-0499 • Fax: (615) 360-0275

Visit our Web Site at www.akgusa.com

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Contents Wireless Microphone Systems Review of Technical Fundamentals IntroductionOperation of the diversity receiver Page Basic System Description Page Page Trying Out the System a Typical Setup Comments on Multi-Channel Operation Using Handheld TransmittersUsing the Optional PR 81 Portable Receiver General UsageSpecifications PT81 bodypack transmitter

WMS61, WMS81 specifications

AKG Acoustics has been a leading name in professional audio equipment for decades, renowned for its innovative designs and superior sound quality. The WMS81 and WMS61 are two notable products in their wireless microphone systems, designed to meet the demanding needs of live performances, presentations, and broadcasting. Both systems offer exceptional performance, ease of use, and advanced technology, making them ideal choices for musicians, public speakers, and audio professionals.

The AKG WMS81 is notable for its precision and reliability. One of its main features is its advanced frequency management technology, which ensures a stable connection by automatically scanning for the clearest frequencies. This minimizes the risk of interference during live performances. The WMS81 also includes a high-quality handheld transmitter with an AKG D5 microphone capsule, known for its excellent feedback rejection and vocal clarity. This makes it particularly suitable for dynamic performances where clarity and volume are essential. Additionally, the WMS81 offers a wide frequency response, ensuring that every nuance of the performance is captured.

On the other hand, the AKG WMS61 is a versatile system that provides excellent sound quality and flexibility. It features a compact bodypack transmitter designed for use with lavalier or headworn microphones, providing hands-free operation that is perfect for presentations or theater performances. The WMS61 includes a diverse selection of frequency channels, enabling users to operate multiple systems simultaneously without interference. Its sturdy construction ensures durability, which is essential for the rigors of touring and frequent use.

Both systems utilize AKG's renowned audio technologies, including their high-frequency response and low distortion characteristics. Another key feature of these systems is the automatic frequency selection capability, allowing users to easily find the best available channel in crowded RF environments. They also both come equipped with an efficient battery management system, offering extended operational time to ensure reliability during long events.

In summary, the AKG WMS81 and WMS61 wireless microphone systems are excellent choices for anyone looking for high-quality audio performance in a wireless format. Their robust features, advanced technologies, and user-friendly designs make them suitable for a wide range of applications, from live performances to corporate events. With AKG's commitment to innovation and quality, both systems promise to deliver exceptional sound and reliability for audio professionals and enthusiasts alike.