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4
Precautions
This component has been tested and found to comply with the limits set out in the EMC Directive using a
connection cable shorter than 3 metres.
Running-In
AMR estimates that the LS-77 may take between 300-500 operating hoursat fairly high sound pressure levels
for all of the internal components to be fully-broken in. Hence, please anticipate the sonic performance of the
LS-77 to settle only after it has been used for this approximate length of time.
We recommend the following procedure to speed upthe "burn in" for the LS-77:
Place the speakers face to face with faceplates almost touching and connect normally to the Amplifier. In
conjunction with an out of phase mono signal this will cancel most noise. A heavy blanket may be thrown over
the speakers to cancel more noise.
Play the “Pink Noise Out Of Phase” track (Track 4) from AMR’s System Test CD (included with the speakers)
on repeat. Raise the volume as high as sensible (but quite high), the out of phase nature will cancel a lot of noise,
so be careful when raising levels not to overload the Amplifier.
Using AMR’s AM-77 & CD-77 the maximum level recommended for burn in is -10db, the minimum level -16db.
When using -16db a minimum of 120 Hours burn in should be applied, with -12…-10db level setting on the AM-
77 this can be shortened to 72 Hours. This will take the LS-77’s through the phase where the performance
changes quite dramatically.