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Sennheiser AB 4-GW Antenna amplifier 558-626 MHz
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| Type of Product | Antenna amplifiers |
| Connection type | Radio |
| Accessories for microphones | Antennas |
| Connector | other |
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The Sennheiser AB 4-GW is a compact inline antenna booster for evolution wireless G4 systems, providing +10 dB gain to offset signal loss from long cable runs across an 88 MHz tuning bandwidth (558-626 MHz). Featuring BNC connectors, filtered design for RF interference rejection, and full compatibility with G3 systems, it measures 4.9 x 1.0 x 3.2 inches and weighs 0.4 lb, ideal for reliable wireless mic setups in live sound or broadcast.
The Sennheiser AB 4-GW Antenna Booster represents an evolution in RF signal amplification for professional wireless audio, specifically tailored to the expanded switching bandwidth of Sennheiser's ew G4 series (ew 300 G4, ew 500 G4), delivering a consistent +10 dB gain to counteract attenuation from extended coaxial cable runs (up to 100 m RG-58 without degradation). Operating in the GW frequency range (558-626 MHz, 88 MHz bandwidth), its inline module incorporates active bandpass filtering (3 dB cutoff slopes) to suppress out-of-band interference and harmonics, ensuring clean signal distribution in multi-channel environments like theaters, houses of worship, or ENG productions. The rugged, weather-resistant aluminum housing (IP54-rated) houses BNC female input/output connectors (50 Ω impedance, VSWR <1.51), supporting daisy-chaining up to 4 units per antenna line while maintaining phantom power passthrough (9-18 V DC, <50 mA draw). Backward-compatible with legacy ew G3 systems, it enhances RF reliability without recalibration, and its low noise floor (NF <2.5 dB) preserves dynamic range for vocal/instrument mics. At just 4.9 x 1.0 x 3.2 inches (12.4 x 2.6 x 8.2 cm) and 0.4 lb (0.2 kg), the AB 4-GW mounts discreetly via VESA brackets or adhesive, powering via external 12 V adapter (not included) for seamless integration into A/B antenna combiners or remote head systems.
Key Features
- +10 dB active gain with bandpass filtering for extended cable runs (up to 100 m)
- 88 MHz tuning bandwidth (GW 558-626 MHz) optimized for ew G4 systems
- BNC inline connectors Low-loss (0.2 dB/ft at 600 MHz), supports daisy-chaining
- RF interference rejection Suppresses out-of-band noise (>40 dB attenuation)
- Full G3/G4 compatibility Phantom power passthrough, no recalibration needed
- Compact aluminum housing IP54-rated, lightweight for portable or fixed installs
- 1 Compact inline antenna booster
- Frequency Range GW (558-626 MHz, 88 MHz bandwidth)
- Gain +10 dB
- Connectors BNC Female (input/output, 50 Ω)
- Power 9-18 V DC phantom (via BNC), <50 mA
- Noise Figure <2.5 dB
- VSWR <1.51
- Dimensions 4.9 x 1.0 x 3.2" / 12.4 x 2.6 x 8.2 cm
- Weight 0.4 lb / 0.2 kg
- Housing Aluminum (IP54 dust/moisture resistant)
- Operating Temperature -10°C to +50°C
