SR IEM G4
RF characteristics
Modulation Wideband FM stereo (MPX pilot tone)
Frequency ranges
A1: 470 – 516 MHz
A: 516 – 558 MHz
AS: 520 – 558 MHz
G: 566 – 608 MHz
GB: 606 – 648 MHz
B: 626 – 668 MHz
C: 734 – 776 MHz
D: 780 – 822 MHz
E: 823 – 865 MHz
Receiving frequencies Max. 1680 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 (frequency/deviation) 19 kHz/±5 kHz
Frequency stability ±10 ppm
Antenna output BNC socket, 50 Ω RF output power at 50 Ω switchable:
Low: typ. 10 mW
Standard: typ. 30 mW
High: typ. 50 mW

AF characteristics
Compander system Sennheiser HDX
AF frequency response 25 Hz to 15 kHz
AF input BAL AF IN L (I) + MONO/ BAL AF IN R (II)
2x XLR-3/1⁄4″ (6.3 mm) jack combo socket, electronically balanced
Max. input level +22 dBu
Total harmonic distortion (THD) <0.9 %
Signal-to-noise ratio (at nominal load and peak deviation) >90 dB
AF output LOOP OUT BAL L (I)/ LOOP OUT BAL R (II)
1⁄4″ (6.3 mm) stereo jack socket, balanced

Overall device
Temperature range -10 °C to +55 °C
Power supply 12 V DC
Current consumption max. 350 mA
Dimensions Approx. 202 x 212 x 43 mm
Weight Approx. 980 g

EK IEM G4

RF characteristics
Modulation Wideband FM
Frequency ranges A1: 470 – 516 MHz
A: 516 – 558 MHz
AS: 520 – 558 MHz
G: 566 – 608 MHz
GB: 606 – 648 MHz
B: 626 – 668 MHz
C: 734 – 776 MHz
D: 780 – 822 MHz
E: 823 – 865 MHz
Receiving frequencies Max. 1680 frequencies, adjustable in 25 kHz steps
20 frequency banks, eachwith 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
Receiver principle Adaptive diversity
Sensitivity (with HDX, peak deviation) < 4 μV, typ. 1.6 μV for 52 dBA rms S/N
Adjacent channel selection Typically ≥ 65 dB
Intermodulation attenuation
Typically ≥ 70 dB
Blocking ≥ 80 dB
Squelch 5 to 25 dBμv
adjustable in steps of 2 dB
Pilot tone squelch Can be switched off

AF characteristics
Compander system Sennheiser HDX
Signal-to-noise ratio (1 mV, peak deviation) approx. 90 dBA
Total harmonic distortion (THD) ≤ 0.9 %
Output power at 2.4 V,5 % THD, nominal deviation 2 x 100 mW at 32 Ω
High Boost +8 dB at 80 kHz
Limiter –18 dB to –6 dB, adjustable in steps of 6 dB, can be switched off

Overall device
Temperature range -10 °C to +55 °C
Power supply 2 AA batteries, 1.5 V or BA 2015 accupack
Nominal voltage 3 V battery / 2.4 V rechargeable battery
Current consumption at nominal voltage: approx. 140 mA
with transmitter switched off: ≤ 25 μA
Operating time approx. 4 to 6 hours (depending on volume level)
Dimensions Approx. 82 x 64 x 24 mm
Weight (incl. batteries) approx. 125 g