Sennheiser Ew 100 G4-945-S-A1

Evolution Wireless G4: The 4th Generation Built for the Field

The Sennheiser ew 100 G4 is part of the "evolution wireless" line, a range that has become a benchmark for users who want to switch to professional wireless microphones without unnecessary complexity. This fourth generation (G4) emphasizes robustness, UHF stability, and rapid deployment, while maintaining a clear user interface on the receiver's LCD screen.

Within the range, this Vocal Set ew 100 G4-945 aims for an ideal balance: advanced enough to handle demanding environments (studio, stage, events), yet quick to configure when balancing, interventions, and stage changes need to follow one another.

For Which Voices and Uses?

Designed for professional live sound, this system targets singers, presenters, lecturers, and technical teams seeking an intelligible voice, well-centered in the mix, with excellent resistance to feedback (Larsen). The supercardioid directivity helps limit pickup from monitors and rear sources, facilitating stage work and improving voice clarity in the room.

With a range advertised up to 100 m (depending on environment) and a stable UHF band, it performs well on tour, outdoors, in conference rooms, amphitheaters, or events where radio reliability is a prerequisite.

What Sets the ew 100 G4-945 Apart

The e 945 Capsule: Presence, Articulation, and Control

The set relies on the MMD 945-1 capsule (from the e 945 family) known for its clarity and precise vocal reproduction. Its specified frequency response of 80 Hz to 18 kHz maintains a solid foundation while enhancing intelligibility. The supercardioid pattern helps keep the voice upfront, even when the stage is noisy or monitors are loud.

True Diversity Receiver and Metal Chassis: A Solid Base for the Stage

The EM 100 G4 half-rack receiver is based on True Diversity technology and housed in a fully metal case. The goal is simple: secure reception and offer direct control of essential parameters via an intuitive LCD screen, particularly useful for quick adjustments during stage changes.

Fast Workflow: IR Sync and Multichannel Management

Infrared synchronization between transmitter and receiver speeds up setup. For multi-system configurations, the linking function allows quick frequency assignment for up to 12 receivers, while supporting up to 20 compatible channels. A real time saver when multiple speakers follow one another or when a frequency plan must be implemented without losing track of the event.

Controlled Dynamics and Integrated Equalization

The Sennheiser HDX compressor-expander contributes to stable and clean transmission, with a high specified signal-to-noise ratio. For quick adaptation to context, several equalizer presets are available (flat, low cut, low cut + high boost, high boost) to adjust the voice to the room, microphone placement, and timbre type without complicating the setup.

Technical specifications

Category	Complete system	Capsule	dynamic
Directivity	supercardioid

Range A1	470 - 516 MHz	Silent tuning	5 dB µV average; 15 dB µV high; 25 dB µV
Principle	True Diversity technology	Frequencies	up to 1680 frequencies, 25 kHz increments
Compressor-expander	Sennheiser HDX	Frequency banks	20 banks with 12 preset channels (intermodulation-free) + 1 bank with up to 12 programmable channels
Total harmonic distortion	less than or equal to 0.9%	Equalizer	Preset 1 flat; Preset 2 low cut filter (-3 dB at 180 Hz); Preset 3 Low Cut/High Boost (-3 dB at 180 Hz, +6 dB at 10 kHz); Preset 4 High Boost (+6 dB at 10 kHz)
Signal-to-noise ratio	greater than or equal to 110 dBA	Temperature range	-10 degC to +55 degC
Switchable bandwidth	up to 42 MHz	RF output power	max. 30 mW
Maximum frequency deviation	+/-48 kHz	Battery life	typically 8 hours
Nominal frequency deviation	+/-24 kHz	Consumption (nominal voltage)	typically 180 mA
Modulation	wideband FM	Input impedance	40 kΩ
Audio outputs	6.35 mm Jack (unbalanced) +12 dBu; XLR (balanced) +18 dBu	Maximum input voltage	3 Vrms
Antenna connectors	2 BNC sockets	Power on	3 V battery / 2.4 V rechargeable battery
Power supply	12 V DC	Transmission frequency	up to 1680 frequencies, 25 kHz increments; 20 banks with 12 preset channels (intermodulation-free) + 1 bank with up to 12 programmable channels
Consumption	300 mA	Audio frequency response	80 - 18000 Hz
Adjacent channel selectivity	generally >= 65 dB	Frequency stability	+/-15 ppm
Intermodulation attenuation	generally >= 65 dB	Dimensions	approx. diameter 50 x 265 mm
Blocking	>= 70 dB	Weight	approx. 450 g (with batteries)
RF sensitivity	less than 2.5 µV at 52 dBA effective S/N