A number of issues are the result of wireless loudspeakers which have low power efficiency: A lot of wasted power obviously means higher operating expenditure which means that a more pricey set of wireless loudspeakers can in fact in the long term possibly be more affordable than a less costly model which has lower efficiency. Lower efficiency wireless speakers are going to dissipate a lot of energy as heat. Cordless loudspeakers that have low efficiency have to have a larger power supply to create the same level of music power as high-efficiency products. The lifespan of the wireless loudspeakers might be lowered and reliability could be jeopardized. Because every amplifier will need a specific level of power, irrespective of the level of energy the amplifier provides to the loudspeakers, the amp power efficiency is higher the more energy the amp delivers and is normally given for the maximum power the amp can handle.
To determine the efficiency, the audio power that is consumed by a power resistor that is attached to the amp is divided by the overall power the amplifier uses while being fed a constant sine wave signal. Since the efficiency will depend on the audio power, normally the output power is varied and an efficiency graph made which can show the amplifier efficiency for each level of output power. Therefore wireless loudspeakers that use Class-D amplifiers ordinarily have lower music fidelity than types using analog Class-A amps. A number of more recent cordless loudspeakers, for instance types that contain Class-T amplifiers, can minimize audio distortion to amounts close to the ones from products utilizing analog music amplifiers and in addition can achieve high signal-to-noise ratio. Selecting one of these bluetooth outdoor loudspeakers will deliver high efficiency and at the same time large audio fidelity.