evolution wireless In Ear Monitoring
w In Ear Monitoring (IEM)
• Preconfigured, ready-to-use system
• Extremely reliable UHF transmission
• Enormous flexibility due to 1,280 tunable UHF frequencies
• Transmitter and receiver with rugged metal housings
• HDX noise reduction for crystal-clear sound
• User-friendly, menu-assisted operation via LC display
• Low-battery warning
• Extensive range of accessories ensure suitability for a wide variety of applications
• Suitable for multi-channel applications
evolution wireless IEM System – Products
SR 300 IEM stereo transmitter
• 8 frequency presets for direct channel selection
• Stereo/mono selector switch
• Headphone output for monitoring purposes
EK 300 IEM stereo receiver
• 8 frequency presets for direct channel selection
• Safety mode (switchable) protects against level peaks
• FOCUS function for individual audio mix
IE 1 stereo in-ear headphones
• With ear-moulds
evolution wireless In Ear Monitoring
The evolution wireless IEM system consists of three main components: At the heart of
the system is the SR 300 IEM stereo rackmountable transmitter. The rugged EK 300 IEM
stereo pocket receiver has been specially designed for rough stage use – its modern
controls, adapted to live stage work, ensure a straight-forward, intuitive operation.
Both transmitter and receiver feature a special “lock mode” function to prevent
operating errors. With in-ear headphones connected to the receiver, the musician
and/or sound engineer can listen to the stereo audio signal received. Transmitter and
receiver of the evolution wireless IEM system feature 8 frequency presets for direct
channel selection. For multi-channel applications with two to four monitoring links,
Sennheiser offers the AC 1 antenna combiner. Another brilliant feature of evolution
wireless IEM is the receiver’s FOCUS function, enabling artists to select their very
own balance between their voice/instrument and the band. When transmitting such a
custom mix, the usual stereo signal is changed to a dual mono signal. The receiver is
also fitted with a special safety mode which restricts the in-ear volume to safe levels –
if higher volume levels should be required, the safety mode can be switched off.
Carrying case for complete systems
CC 1
Cat. No. 04797
Antenna combiner
AC 1
Cat. No. 04791
Antenna mount
AM 1
Cat. No. 04793
19” rack adaptor
GA 1
Cat. No. 04792
For the complete range of accessories available, please refer to the chapter “Accessories”, page 193 f.
evolution wireless In Ear Monitoring
Technical Data
Frequency ranges
Tunable frequencies
System –
Technical Data
EK 300 IEM
wideband FM stereo,
Receiver type
pocket receiver
Receiver principle
A: 518–550, B: 630–662,
Antenna input
C: 740–772, D: 790–822,
AF outputs
E: 838–870 MHz
Max. output level
Headphone output
3.5 mm jack socket
(> 100 mW at 32 Ω)
Frequency presets
Switching bandwidth
32 MHz
Level adjustment
Peak deviation
± 48 kHz
Power supply
9 V PP3 alkaline battery
(pilot tone dev. ± 5 kHz)
(IEC 6 LR 61)
Compander system
Operating time
> 4–6 h
AF frequency response
50–15,000 Hz
110 x 65 x 22 mm
Signal-to-noise ratio
> 100 dB (A)
approx. 255g
THD (1 kHz)
< 0.9 %
Dimensions system case
380 x 370 x 70 mm
Weight system case
approx. 3 kg
In compliance with
ETS 300422, ETS 300445,
Technical Data
SR 300 IEM
Transmitter type
mains transmitter
RF output power
> 20 mW
Max. input voltage
balanced: + 10 dBu
Headphone output
1/ ” (6.3 mm) jack socket,
Level adjustment
0–15 dB
Power supply
10.5–16 V DC
212 x 145 x 38 mm
approx. 1100g