105-307 Crescendo Personal Comms System
Crescendo 20 plus
Personal Communication System
The Personal Communication System is an easy to use amplifying system for use by
hearing impaired people with or without a hearing aid. The system can also be used
to check the operation and function of fixed or portable loop installations.
With one simple volume control the user’s volume can be easily varied without
affecting others. An “in built” microphone makes the system ideal for general
conversation where trailing wires can be a nuisance. A microphone with 4 metre
lead can be used to get right to the sound source e.g. television or Hi-Fi etc. A 3
position tone control allows you to boost the high or low frequencies to suit your
needs. A loop pick up facility allows you to receive loop signals without using a
hearing aid.
The system is supplied ready to use with an alkaline battery, Stethoscope headset
HS5, neck loop and 4 m microphone with tie clip and Velcro pads.
The system is designed for use by hearing aid and non-hearing aid wearers alike
with the stethoscope headset or by hearing aid users, whose hearing aid has the loop
or ‘T’ facility, with the neck loop.
Product conforms to the provisions of the following European Union Directives :
• 89/336 & 92/31 Electro Magnetic Compatibility Directives
• 93/68 CE Marking Directive
The output is suitable for use with most types of headphones with an impedance of
32 ohms and fitted with a 3.5mm STEREO jack plug.
Sarabec Limited 15 High Force Road Middlesbrough TS2 1RH
Telephone (01642) 247789 Fax (01642) 230827 Text (01642) 251310
105-307.001 0504 Cres 20 Pers Comms System.doc
The sound output levels from this system can be very high. It is
recommended that the volume control should be turned to the
"OFF" position before changing the battery or plugging in or
unplugging the headphones or microphone.
Instructions for use
Either – Switch the two position microphone switch on the side to <Int> to use the
“in-built” microphone.
– Plug the 4 metre lead microphone into the socket marked <Mic> and switch the
two position microphone switch on the side to <Ext>. Either the tie-clip or selfadhesive Velcro pads can be used to attach the microphone to the wearer or equipment
Either – Plug the headset into the socket marked <Phones> and place them over your
– Plug the neck loop into the socket marked <Phones> and switch your hearing
aid to the “T” or “MT” position and place the neck loop around your neck.
The amplifier is fitted with a 3 position switched Tone control on the side. In the
<High> position the amplifier will emphasise the higher frequency range and in the
<Low> position the lower frequency range. In the <Norm> position the high or low
frequencies are not emphasised.
To receive signals from a loop system switch the two position microphone switch to
<Ext> and unplug the 4 metre lead microphone (if used). This allows the internal pickup to receive signals from an inductive loop system installed for use by hearing aid
users. This is like a hearing aid switched to the “T” position. It may be necessary to
turn or move the amplifier to get the best signal.
Remember to switch off the amplifier when not in use by turning the knob fully anticlockwise, when a "click" will be felt.
The product should give a long and trouble-free service if the following points are observed.
• Keep the unit clean with a damp cloth should the unit require cleaning.
• Treat the headset and microphone leads carefully, they are quite thin in order to be
convenient and comfortable to use.
• DO NOT wrap the leads around the amplifier.
• DO NOT leave leads trailing across the floor to be tripped over.
Battery Changing
To change the battery in the amplifier, turn it over and whilst pressing down, slide the
battery cover in the direction of the arrow. The old battery can now be removed by turning
the unit
over and tapping gently. Unclip the connector from the battery. Fit a new battery making
sure that the wires are tucked out of the way. Slide the battery cover into place.
Battery type : Alkaline PP3, MN1604, or equivalent. We would suggest that batteries are
bought from a reputable shop with a reasonable turnover to ensure "fresh" stock. The
amplifier must be fitted with an alkaline battery.
Mains Adaptor
The amplifier may be used with a mains adaptor, please contact your dealer for the correct
adaptor. If the mains adaptor is to be used exclusively, please remove the battery to prevent
leakage and damage to the amplifier. The adaptor should be unplugged when not in use.
If another type of mains adaptor is used damage could be caused to the equipment if
inappropriate voltages, currents or polarity are used.
Problems and Cures
No Sound
• Headset or Neck Loop & microphone in wrong sockets change round.
• Battery exhausted - fit new battery.
• Microphone switch in wrong position - set to <Ext> to use
with 4m lead microphone or as a loop receiver and to <Int>
to use the “in built” microphone.
Low or distorted sound
• Battery almost exhausted -fit new battery.
• Neck loop too close to neck – move towards shoulders away
from neck.
Buzz or squeal after short • Battery almost exhausted, system will seem OK when first
switched on - fit new battery
Crackling or
• Dirty plug - clean plug.
Sound goes on & off
• Faulty leads - wiggle lead by plug to find faulty lead, replace
Tinny or muffled sound
• Tone control in wrong position - switch to another position.
If in doubt please contact your dealer for assistance.
Headphones or neck loops with mono jack plugs will not work correctly with the system and
may cause damage to the amplifier.
If the system needs to be returned for repair please send the complete system including the
amplifier and accessories. Please state the nature of the fault and the return address.
Accessories and Spares
Accessories and spares are available from the address at the end of this manual.
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF