PRODUCT SPECIFICATION 1/7

evolution wireless G4
ew IEM G4 | Wireless Monitor Set

Full control over your performance – your direct link, everywhere, everyday. The G4 In-Ear Monitoring Sets make your gig
an extraordinary experience – not just for your audience, but also for you.
Robust bodypack receiver and reliable in-ear monitoring IE 4 headphones delivering clarity along the whole frequency
spectrum for daily use on stage.

FEATURES DELIVERY INCLUDES

• Engineered for professional live sound: • SR IEM G4 stereo transmitter
Rugged all-in-one wireless monitoring system for in-ear • EK IEM G4 stereo receiver
applications.
• IE 4 earphones
• Robust bodypack receiver and reliable in-ear monito-
• 2 AA batteries
ring IE 4 headphones delivering clarity along the whole
frequency spectrum for daily use on stage • rod antenna
• Half-rack stereo transmitter in a full-metal housing with • GA 3 rackmount set
OLED display for full control • quick guide
• Easy and flexible wireless synchronization between • safety guide
transmitter and receiver via infrared • manufacturer declaration sheet
• Compatible with Sennheiser WSM control software for
flexible frequency allocation
• Up to 16 compatible channels
• Up to 42 MHz bandwidth with 1680 selectable frequen-
cies, fully tunable in a stable UHF range
• Transmission Range: up to 100 meters / 300 feet
• High RF output power (up to 30 mW) depending on
country regulations
 PRODUCT SPECIFICATION 2/7

evolution wireless G4
ew IEM G4 | Wireless Monitor Set

SPECIFICATIONS

SR IEM G4 RF output power at 50 Ω switchable:

Low: typ. 10 mW
RF characteristics Standard: typ. 30 mW
Modulation Wideband FM stereo High: typ. 50 mW
(MPX pilot tone)
Frequency ranges A1: 470 - 516 MHz AF characteristics
A: 516 - 558 MHz Compander system Sennheiser HDX
AS: 520 - 558 MHz AF frequency response 25 Hz to 15 kHz
G: 566 - 608 MHz
GB: 606 - 648 MHz AF input 2x XLR-3/¼" (6.3 mm) jack
B: 626 - 668 MHz BAL AF IN L (I) + MONO/ combo socket, electroni-
C: 734 - 776 MHz BAL AF IN R (II) cally balanced
D: 780 - 822 MHz Max. input level +22 dBu
E: 823 - 865 MHz
Total harmonic distortion <0.9 %
Transmitting frequencies Max. 1680 frequencies, (THD)
adjustable in 25 kHz steps
Signal-to-noise ratio (at >90 dB
nominal load and peak
20 frequency banks, each
deviation)
with up to 16 factory-preset
channels, no intermodula- AF output ¼" (6.3 mm) stereo jack
tion LOOP OUT BAL L (I)/ socket,
LOOP OUT BAL R (II) balanced
6 frequency banks with
up to 16 programmable Overall device
channels
Temperature range -10 °C to +55 °C
Switching bandwidth up to 42 MHz
Power supply 12 V DC
Nominal/peak deviation ±24 kHz / ±48 kHz
Current consumption max. 350 mA
MPX pilot tone 19 kHz/±5 kHz
(frequency/deviation) Dimensions Approx. 202 x 212 x 43 mm

Frequency stability ±10 ppm Weight Approx. 980 g

Antenna output BNC socket, 50 Ω

CONNECTIONS
 PRODUCT SPECIFICATION 3/7

evolution wireless G4
ew IEM G4 | Wireless Monitor Set

SPECIFICATIONS

EK IEM G4
AF characteristics
RF characteristics Compander system Sennheiser HDX
Modulation Wideband FM Signal-to-noise ratio (1 mV, approx. 90 dBA
Frequency ranges A1: 470 - 516 MHz peak deviation)
A: 516 - 558 MHz Total harmonic distortion ≤ 0.9 %
AS: 520 - 558 MHz (THD)
G: 566 - 608 MHz
GB: 606 - 648 MHz Output power at 2.4 V, 2 x 100 mW at 32 Ω
B: 626 - 668 MHz 5 % THD, nominal deviation
C: 734 - 776 MHz High Boost +8 dB at 80 kHz
D: 780 - 822 MHz
Limiter –18 dB to –6 dB,
E: 823 - 865 MHz
adjustable in steps of 6 dB,
Receiving frequencies Max. 1680 frequencies, can be switched off
adjustable in 25 kHz steps
Overall device
20 frequency banks, each
with up to 16 factory-preset Temperature range -10 °C to +55 °C
channels, no intermodula- Power supply 2 AA batteries, 1.5 V or
tion BA 2015 accupack

6 frequency banks with Nominal voltage 3 V battery /

up to 16 programmable 2.4 V rechargeable battery
channels Current consumption at nominal voltage:
Switching bandwidth up to 42 MHz approx. 140 mA
with transmitter switched
Nominal/peak deviation ±24 kHz / ±48 kHz off: ≤ 25 µA
Receiver principle Adaptive diversity Operating time approx. 4 to 6 hours
Sensitivity (with HDX, peak < 4 μV, typ. 1.6 μV (depending on volume
deviation) for 52 dBA rms S/N level)
Adjacent channel selection Typically ≥ 65 dB Dimensions Approx. 82 x 64 x 24 mm
Intermodulation attenua- Typically ≥ 70 dB Weight (incl. batteries) approx. 125 g
tion
Blocking ≥ 80 dB
Squelch 5 to 25 dBµV,
adjustable in steps of 2 dB
Pilot tone squelch Can be switched off
 PRODUCT SPECIFICATION 4/7

evolution wireless G4
ew IEM G4 | Wireless Monitor Set

DIMENSIONS

SR IEM G4 212.1
8.35
1.61
43.2

41
1.7

6,35mm Klinke, stereo

6,35 plug, stereo XLR 3 oder 6,35mm Klinke, stereo
XLR 3 or 6,35mm plug, stereo
DC Power-Jack 6,35mm Klinke, stereo symmetrisch
6,35mm plug, stereo symmetrical
Zugentlastung BNC
Cable Grip RJ 45
1.14
29

23.7
0.93
9.7 15.3
12.2
15.45

0.48

14.35
15.2
0.61

0.56
0.38 0.6
0.6

28.7 50.8
1.13 2
47.6 92.3
1.87 3.63
66.7
2.63
90.6
3.57

20.7
0.81
13.4
0.53

15.1
12.8

0.59
0.5

168
6.61
 PRODUCT SPECIFICATION 5/7

evolution wireless G4
ew IEM G4 | Wireless Monitor Set

DIMENSIONS

EK IEM G4
4.72
max. 120
84.3
3.32

3,5mm Klinke
3,5mm plug

10 OFF
1.22
31

6 4

65.3
2.57
 PRODUCT SPECIFICATION 6/7

evolution wireless G4
ew IEM G4 | Wireless Monitor Set

PRODUCT VARIANTS

Made in Germany Assembled in USA

ew IEM G4-A1 470 - 516 MHz Art. no. 507828 ew IEM G4-A1 470 - 516 MHz Art. no. 508167
ew IEM G4-A 516 - 558 MHz Art. no. 507829 ew IEM G4-A 516 - 558 MHz Art. no. 508168
ew IEM G4-GB 606 - 648 MHz Art. no. 507830 ew IEM G4-AS 520 - 558 MHz Art. no. 508169
ew IEM G4-G 566 - 608 MHz Art. no. 507831 ew IEM G4-G 566 - 608 MHz Art. no. 508170
ew IEM G4-B 626 - 668 MHz Art. no. 507832 ew IEM G4-B 626 - 668 MHz Art. no. 508171
ew IEM G4-C 734 - 776 MHz Art. no. 507833 ew IEM G4-C 734 - 776 MHz Art. no. 508172
ew IEM G4-E 823 - 865 MHz Art. no. 507834 ew IEM G4-D 780 - 822 MHz Art. no. 508173
ew IEM G4-TH 794 - 806 MHz Art. no. 508583

ARCHITECT‘S SPECIFICATION
A wireless RF monitoring system consisting of a stereo rack-mount transmitter and a compact monitoring receiver.
The transmitter shall operate within nine UHF frequency ranges, with a switching bandwidth of up to 42 MHz: 470 –
516 MHz, 516 – 558 MHz, 520 – 558 MHz, 626 – 668 MHz, 734 – 776 MHz, 780 – 822 MHz, 823 – 865 MHz, 566 – 608 MHz,
606 – 648 MHz; transmitting frequencies shall be 1,680 per range and hall be tunable in 25 kHz steps. The transmitter
shall feature 20 fixed frequency banks with up to 16 compatible frequency presets and 6 user banks with up to 16 user
programmable frequencies.
The transmitter shall be menu-driven with a backlit OLED display showing the current frequency, frequency bank and
channel number, metering of AF level, transmission status, transmission power, equalizer setting, input sensitivity, and
lock status. An auto-lock feature shall be provided to prevent settings from being accidentally altered.
The parameters of associated receivers shall be configurable in the transmitter menu and synchronized with the receivers
via an integrated infrared interface.
Frequency stability shall be ±10 ppm. RF output power at 50 Ω shall be switchable between 10 mW (low), 30 mW (stan-
dard) and 50 mW (high).
The stereo audio input shall utilize two discrete (left/right) electronically balanced ¼“ (6.3 mm) jack/XLR-3F combo
sockets; the audio output shall utilize a balanced ¼“ (6.3 mm) jack socket; an audio loop output shall be provided utilizing
two balanced ¼“ (6.3 mm) jack sockets. A headphone output with headphone volume control shall be provided and shall
utilize a ¼“ (6.3 mm) stereo jack socket. The transmitter shall have an Ethernet port (RJ-45) for remote network-based
monitoring and control using the Sennheiser Wireless System Manager software. One 50 Ω BNC-type input socket shall
be provided for connecting the antenna.
Nominal/peak deviation shall be ±24 kHz/±48 kHz. The transmitter shall incorporate the Sennheiser HDX compander
system and shall include a 19-kHz MPX pilot tone with a ±5 kHz deviation. The audio frequency response shall range from
25 –15,000 Hz. Maximum input level shall be +22 dBu. Total harmonic distortion (THD) at 1 mV and nominal deviation shall
be < 0.9 %. Signal-to-noise ratio at nominal load and peak deviation shall be > 90 dB.
The transmitter shall operate on 12 V power supplied from the NT 2-3 mains unit (for 100 – 240 V AC, 50/60 Hz). Power
consumption shall be 350 mA. The transmitter shall have a rugged metal housing; dimensions shall be approximately 202
x 212 x 43 mm (7.95“ x 8.35“ x 1.69“). Weight shall be approximately 980 grams (2.16 lbs). Operating temperature shall
range from −10 °C to +55 °C (+14 °F to +131 °F).
The transmitter shall be the Sennheiser SR IEM G4.
 PRODUCT SPECIFICATION 7/7

evolution wireless G4
ew IEM G4 | Wireless Monitor Set

The receiver shall operate within nine UHF frequency ranges, with a switching bandwidth of up to 42 MHz: 470 – 516 MHz,
516 – 558 MHz, 520 – 558 MHz, 626 – 668 MHz, 734 – 776 MHz, 780 – 822 MHz, 823 – 865 MHz, 566 – 608 MHz, 606 –
648 MHz; receiving frequencies shall be 1,680 per range and shall be tunable in 25 kHz steps. The receiver shall feature
20 fixed frequency banks with up to 16 compatible frequency presets and 6 user banks with up to 16 user programmable
frequencies.
The receiver shall be menu-driven with a backlit LC display showing the current frequency, frequency bank and channel
number, metering of RF level, metering of AF level, lock status, battery status, muting function or audio channels, and
pilot tone evaluation. An auto-lock feature shall be provided to prevent settings from being accidentally altered.
The receiver parameters shall either be configurable in the associated transmitter’s menu and synchronized with the
receiver via an integrated infrared interface or shall be programmable in the receiver menu.
The earphone output shall utilize a 3.5 mm stereo jack socket with an output level of 2.4 V with 5 % THD at nominal devia-
tion and an output power of 2x 100 mW at 32 Ω.
Nominal/peak deviation shall be ±24 kHz/±48 kHz. Squelch threshold shall be defeatable (off) or adjustable from 5 -
25 dBμV in steps of 2 dB.
The receiver shall incorporate the Sennheiser HDX compander system and a defeatable pilot tone squelch. Sensitivity
shall be < 4 μV, 1.6 μV (typical) for 52 dBArms S/N with HDX engaged at peak deviation. Adjacent channel rejection shall
be ≥ 65 dB (typical). Intermodulation attenuation shall be ≥ 70 dB (typical); blocking shall be ≥ 80 dB.
Signal-to-noise ratio at 1 mV and peak deviation shall be approx. 90 dB. Total harmonic distortion (THD) shall be ≤ 0.9 %.
The earphone output shall utilize a 3.5 mm stereo jack socket with an output level of 2.4 V with 5 % THD at nominal devia-
tion and an output power of 2x 100 mW at 32 Ω.
The receiver shall include a switchable High Boost and a multi-level limiter. The High Boost shall be +8 dB at 80 kHz.
The limiter shall be adjustable from –18 dB to –6 dB in 6 dB steps or defeatable (off). The receiver shall provide two audio
output modes, stereo or Focus, and an adjustable balance.
Power shall be supplied to the receiver by two 1.5V AA size batteries or by one Sennheiser BA 2015 rechargeable ac-
cupack. Nominal voltage shall be 2.4 V, current consumption shall be typical 140 mA at nominal voltage; ≤ 25 μA when
receiver is switched off. Operating time shall be approximately 4 to 6 hours (depending on volume level). The receiver
shall have a rugged metal housing; dimensions shall be approximately 82 x 64 x 24 mm (3.23“ x 2.52“ x 0.94“). Weight
including the batteries shall be approximately 125 grams (0.28 lbs). Operating temperature shall range from −10 °C to +55
°C (+14 °F to +131 °F).
The receiver shall be the Sennheiser EK IEM G4.

Sennheiser electronic GmbH & Co. KG · Am Labor 1 · 30900 Wedemark · Germany · www.sennheiser.com