The SR IEM G4 Stereo Transmitter from Sennheiser is an addition to their evolution series of wireless systems. It features wideband FM stereo modulation and can be used when paired with a companion receiver as part of a wireless RF monitoring system for live stage, theater, and rehearsal applications.
The stereo transmitter is equipped with 1680 frequencies tunable in 25 kHz steps and has 20 fixed frequency banks, with up to 16 compatible frequency presets and 6 user banks with up to 16 user-programmable frequencies. The receiver's menu-driven backlit OLED display shows current frequency, frequency bank and channel number, metering of AF level, transmission status, equalizer settings, lock status, and input sensitivity. An auto-lock feature is provided to prevent settings from being accidentally altered.
Additionally, associated receivers can be synchronized with the transmitter via an integrated infrared interface. This transmitter is built with two electronically balanced XLR/1/4" combo sockets, a 1/4" headphone output with headphone volume control, an Ethernet port (RJ-45 for remote network-based monitoring), and a 50 Ohm BNC-type antenna input. Finally, it has a rugged metal housing and includes a 12 V power supply and a GA 3 rackmount kit.
Sennheiser SR IEM G4-A Specs
| Modulation | Wideband FM stereo (MPX pilot tone) |
| Frequency Band | A1: 470 to 516 MHz |
| Receiving Frequency | Maximum 1680 receiving frequencies, adjustable in 25 kHz steps 20 frequency banks, each with up to 16 factory-preset channels, no intermodulation 6 frequency banks with up to 16 programmable channels |
| Switching Bandwidth | up to 42 MHz |
| Nominal/Peak Deviation | ±24 kHz / ±48 kHz |
| MPX Pilot Tone | 19 kHz/ ±5 kHz (frequency/deviation) |
| Frequency Stability | ±10 ppm |
| Antenna Output | BNC socket, 50 Ohms |
| RF Output Power | @ 50 Ohms Switchable: Low: Typical 10 mW Standard: Typical 30 mW High: Typical 50 mW |
| Compander | Sennheiser HDX |
| AF Frequency Response | 25 Hz to 15 kHz |
| AF Input | Electronically Balanced 2 x XLR-1/4" / 6.3 mm balanced combo jack Balanced AF in L +Mono Balanced AF in R |
| Maximum Input Level | +22 dBu |
| Total Harmonic Distortion (THD) | ≤ 0.9 % |
| Signal to Noise Ratio | Approximately >90 dB (nominal load and peak deviation) |
| AF Output | 1/4" / 6.3 mm stereo jack socket balanced Loop out balanced L, loop out balanced R |
| Temperature Range | 14 to 131°F / -10 to 55°C |
| Power Supply | 12 VDC |
| Current Consumption | Maximum 350 mA |
| Dimensions (W x L x H) | 8.0 x 8.3 x 1.7" / 202 x 212 x 43 mm |
| Weight | 2.2 lb / 980 g |
| Package Weight | 5.665 lb |
| Box Dimensions (LxWxH) | 16 x 12.7 x 3.3" |
