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Opus 681 Set, 506-530 MHz

Opus 681 Set

Available at authorized resellers
Article Number: 700649

Vocalset, comprises of NE 600 S receiver and handheld transmitter SEM 681 (electret condenser, cardioid)

The SEM 681 condenser handheld transmitter features studio quality for stage applications. The interchangeable EM 981 microphone head ensures an excellent sound with a warm bass, balanced mids and transparent highs. Also suitable for miking speech in permanent installations.


  • NE 600 S true diversity receiver
  • SEM 681 handheld transmitter
  • Batteries
  • Rack mount material
  • Soft case

The Opus 600 wireless system is recommended for stage performances and small installations (hotels, sports halls, churches etc.). It meets all technology and transmission quality requirements while still being very reasonably priced.

The Opus 600 wireless system is equipped with the automatic frequency setting function, has 16 pre-programmed UHF frequency settings and can be operated with up to 16 channels per frequency range (depending on environment and specific national regulations), simultaneously and with no interference. The latest true-diversity technology, pilot signal detection and adjustable squelch ensure reliable transmission and noise-free reception.


  • 1-channel true diversity receiver (UHF)
  • Rugged 9.5" metal housing
  • 16 pre-programmed UHF frequencies
  • AutoScan/ACT-function
  • PLL-synthesised technology
  • Adjustable Squelch This function allows you to make fine adjustments to the squelch. This is mostly necessary when several wireless systems are used simultaneously and there is interference on individual channels. In principle, the adjustment of the squelch affects the sensitivity; this also has a direct effect on the range of the system. Interference is eliminated by reducing the sensitivity of the channel affected by interference until only the main signal is being is received.
  • Pilot tone recognition
  • Removable antennas (TNC), antenna sockets with power supply (+8 V) for remote antenna amplifiers
  • Audio ouputs: 1 AF "Audio frequency" is a technical term for frequencies in the range of audible sound waves, i.e. frequencies from 20 to 20,000 Hz. In the context of wireless systems, you can simply refer to the audio signal.ouput (3-pin XLR male, balanced) and 1 AF "Audio frequency" is a technical term for frequencies in the range of audible sound waves, i.e. frequencies from 20 to 20,000 Hz. In the context of wireless systems, you can simply refer to the audio signal.output (6,35 mm jack, unbalanced), with MIC/LINE level switch Pocket transmitters: Switching between the Mic/Line levels makes it possible to use a pocket transmitter in a versatile manner. Using the switch, both neckworn and lavaliere microphones as well instruments such as electric guitars can be used.


  • Modular design with interchangeable microphone capsules
  • On/Off switch
  • Power on LED
  • Plastic housing
  • ACT function (Automatic Channel Targeting) for automatic frequency setting
  • Integrated antenna
  • Powered by two AA-batteries (1.5 V)


  • Silver grill
  • Electret condenser microphone capsule
  • Cardioid
  • Built-in metal gaze pop shield without any foam material
  • High SPL capability
  • Switchable low-cut filter to compensate the close-miking effect
  • Frequency response 50 - 18,000 Hz

Please refer to country regulations before using.

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beyerdynamic GmbH & Co. KG
Theresienstr. 8
74072 Heilbronn - Germany

Questions regarding Orders, Payment & Delivery

Phone: +49 7131 617-444

Product Advice

Phone: +49 7131 617-440

Contact us per e-mail:

proaudio @beyerdynamic .com

technical data

Price category   Mid-level
Transducer typeThe transducer system is designed as a dynamic moving coil microphone, as a ribbon microphone or as a condenser microphone.   Electret condenser
Polar patternThe polar pattern is the preferred pick-up direction of the microphone. According to the shape of the corresponding measurement plot, there are omni-directional, cardioid, super-cardioid or hyper-cardioid as well as figure-of-eight patterns. microphone   Cardioid
Microphone frequency responseRange of frequencies transmitted by the microphone from low to extremely high sounds (low to high frequencies).   50-18,000 Hz
Net weight without packaging   2356 g

Spec Sheet


Spec Sheet

User Manual

Info material

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