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5.3 Power rating
Due to the construction and the driver technology, the LS-77 Reference Class Professional Monitors can be
driven with very high power levels. With a high quality amplifier, delivering undistorted signals, the LS-77 can
achieve high volumes without any compromise in sound quality. Also, as the LS-77 Reference Class Professional
Monitors have a reasonably high sensitivity, even high quality amps with a medium power rating can drive the
speaker to yield excellent results.
Attention must be given to amplifiers with very low power and adjustable tone controls or switches and when
using equalizers or room-correction devices. These situations may result in the system trying soon to overreach
the amplifier’s performance limits and may send distorted output signals to the speakers. Any damage caused
under such circumstances is not covered by the AMR warranty and is easily avoided in the first place by
consulting your authorised AMR retailer for advice regarding the choice of amplifier.
If you find that your system continuously lacks the necessary sound pressure level for your liking, despite using
a high quality, high powered amplifier (> 120W RMS into 8 Ohm) please consider upgrading to one of AMR’s
OptiArray® configurations (see Appendix E – LS-77 in OptiArray configurations) and/or the use of AMR’s
own amplifiers using active crossover bi-amplification (see Appendix C – Biamplifying the LS-77). Be sure to
consult your authorised AMR retailer for advise and a demonstration.