Sennheiser IS 150 Instructions For Use Manual page 22

Safety instructions
Use the transmitter only with the supplied Sennheiser plug-in mains unit.
Always disconnect the mains connector when you wish to change
connections or move the device to a different place.
Never open electronic devices! This must only be done by authorised
personnel and is all the more important for current-carrying units.
Keep the system away from central heating radiators and electric heaters.
Never expose it to direct sunlight.
Use the system in dry rooms only.
Use a damp cloth for cleaning the system. Do not use any solvents.
Technical data
Modulation
Carrier frequencies
Audio frequency response
THD
Signal-to-noise ratio
Receiver
Operating time with one BA 151accuplug approx. 6 h
Weight with / without BA 151 accuplug
Max. SPL
Transmitter
Power consumption
Power supply plug-in mains unit:
European version
USA version
UK version
Weight
Accessories
BA 151 accuplug
RI 150 receiver
RI 300 receiver
Replacement ear-cushions, black (firmer version)
Replacement ear-cushions, transparent (softer version)
MKE 100 TV microphone (for TI 150 only)
22
IS 150
FM, mono
2.3 MHz
18–18,000 Hz
1 %
typ. 70 dB
RI 150
45 g / 35 g
110 dBA
TI 150
approx. 7 VA
NG 12-DC
NG 12-120
NG 12-UK
approx. 170 g
IS 300
FM, stereo
2.3 MHz / 2.8 MHz
18–18,000 Hz
1 %
typ. 64 dB
RI 300
approx. 5 h
45 g / 35 g
110 dBA
TI 300
approx. 7 VA
NT 20
NT 20-120
NT 20-UK
approx. 180 g
Cat. no. 04146
Cat. no. 04383
Cat. no. 04378
Cat. no. 37080
Cat. no. 40949
Cat. no. 03354