Technical Data; Operating Tips; Problem Solving Tips - Sennheiser HDI 550 Instructions For Use Manual

TECHNICAL DATA

Modulation
Carrier frequencies
Sound frequency range
THD
S/N ratio
Operating time
Max. sound pressure level
Weight incl. rechargeable
ACCESSORIES
Rechargeable battery plug BA 90 (Cat.No. 03261)
Rechargeable battery charger L 90 for rechargeable battery plug BA 90 (Cat.No. 03262)

OPERATING TIPS

• Before first use the rechargeable battery should be charged for 24 hours !
• Switch off the headphone after use, recharge the rechargeable battery.
• The automatic squelch circuit suppresses hissing noise outside the frequency range.

PROBLEM SOLVING TIPS

Volume turned to maximum
on headphone but no signal
available...
Sound is distorted...
Sound is slightly noisy...
Subject to alterations
FM
2.3 / 2.8 MHz
18 - 24,000 Hz
< 0.8 %
typ. 64 dB (A)
approx. 4 hours per rechargeable battery plug
105 dB
170 g incl. rechargeable battery plug
Signal is missing. Check connection to
transmitter. If volume can be adjusted at
the headphone socket, adjust volume
upward until transmitter is activated.
Receiver may not be operable.
Receiver may not be in the range of reception.
Level control of the transmitter S 550
may not be correct.
Rechargeable battery is completely
discharged. Recharge it immediately!
Volume adjusted at the headphone socket
may be too high. Readjust the volume!
Transmitter is not positioned in optimum
way or connectors are not secured tightly;
reception is obstructed.
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