The EK IEM G4 is the bodypack receiver from Sennheiser’s Evolution G4 in-ear monitoring system, supplied on its own for expanding an existing SR IEM G4 rig or replacing a lost/damaged unit. Adaptive-diversity reception, backlit display, focus/stereo switching, and 3.5 mm headphone output. Band variant: GB, 606-630 MHz (UK CH38). Requires an Ofcom shared PMSE licence in the UK.
CompatibilityPairs with the SR IEM G4 transmitter in the matching GB band. If you are adding this to an existing system, confirm your transmitter is also GB-band and on a free frequency before ordering.
Key Features
Adaptive-diversity UHF bodypack receiver
Focus and stereo listening modes
3.5 mm headphone output with independent level control
Backlit OLED display
One-button sync via IR from matching SR IEM G4 transmitter
UK band GB: 606-630 MHz (UK CH38)
Runs on 2× AA batteries (approx. 4-6 hours)
Audio frequency response 25 Hz-15 kHz
Specifications
| RF carrier range | 606-648 MHz (GB band, includes UK CH38) |
| Switching bandwidth | up to 42 MHz |
| Modulation | Wideband FM stereo (MPX pilot tone) |
| Diversity | Adaptive diversity |
| Compander system | Sennheiser HDX |
| AF frequency response | 25 Hz-15 kHz |
| Signal-to-noise ratio | > 90 dB |
| Headphone output | 3.5 mm stereo jack |
| Power | 2× AA alkaline (or BA 2015 rechargeable) |
| Battery runtime | approx. 4-6 hours |
| Operating temperature | −10 °C to +55 °C |





