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Summary of Contents for Adastra LA-600
- Page 1 LA-600 LOOP AMPLIFIER Item ref: 952.867UK User Manual...
- Page 2 Caution: Please read this manual carefully before operating Damage caused by misuse is not covered by the warranty SAFETY SYMBOL AND MESSAGE CONVENTIONS CAUTION AVIS RISK OF ELECTRIC SHOCK RISQUE DE CHOC ELECTRIQUE NE PAS DO NOT OPEN OUVRIR This symbol indicates that dangerous voltage constituting a risk of electric shock is present within this unit This symbol indicates that there are important operating and maintenance instructions in the literature accompanying this unit.
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Page 3: Front Panel
Introduction Thank you for choosing the Adastra LA600 induction loop amplifier for your assisted hearing installation. This unit is designed to offer high quality, dependable service for areas up to 600m². Please read this manual fully and follow the instructions to achieve the best results with your new purchase and to avoid damage through misuse. -
Page 4: Installation
Installation The LA600 loop amplifier can be operated free-standing or fitted into a standard 19” rack cabinet using the supplied rack ears. Ensure that theLA600 is positioned on a stable surface with adequate cooling ventilation. There are 3 input channels which can accept inputs via balanced XLR or 6.3mm jack connection (14) or unbalanced RCA connection(15). - Page 5 It is recommended to use good quality insulated pure copper cable for the induction loop. The cable gauge used will need to be determined by the total length of the cable run. The LA-600 is designed to operate with a load of between 0.2Ω and 2Ω. The following equation can be used to calculate the total cable resistance, which will show if the gauge is correct.
- Page 6 Cancellation Loops If there are areas adjacent to the loop where the magnetic field would cause problems, it is possible to avoid this by use of a “cancellation loop”, which is a narrow loop parallel to the main loop at the problem area. This loop is the opposite polarity to the main loop and causes the magnetic field to narrow along the adjacent edge of the main loop to control the spill of the loop field.
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Page 7: Operation
Operation The front panel controls on the LA-600 loop amplifier are recessed and can be adjusted using a flat blade screwdriver. This is to avoid tampering or mal-adjustment after the correct settings have been applied. Where new or unsupervised operators are making adjustments to equipment in the venue, they may not be aware if they have adjusted the induction loop settings unless they themselves are a hearing aid user. -
Page 8: Specifications
Specifications Power supply 110/240Vac, 50/60Hz (IEC) Fuse T2A 250V Area coverage 600m² max. Frequency response 50Hz - 5kHz (±3dB) Input sensitivity : line -6dBu/6k Ohms Input sensitivity : mic -56dBu/2k Ohms Signal to noise ratio 75dB (line), 60dB (mic) <1% Dimensions 430 x 235 x 88mm Weight...
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