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Speaker Rated Power
- Sep 07, 2017 -

Speaker rated power

Discussion on Design of Amplifier in Speaker System

Many engineers dealing with loudspeakers and amplifiers will tell you the same thing. If you operate the amplifier too much, it will damage the speaker of the speaker more or less. This process usually involves gradually increasing the bass knob, or the sharp increase in the volume knob. What will happen to this?

It may damage the speaker's tweeter. But why is this happening? Most treble drives are designed for 10W to 15W power ranges. Driving them at high frequencies requires only very little energy. The nominal power of the midrange and subwoofer is typically the average power of the entire loudspeaker (50W and 100W, etc.).

Think about what happens when a sine wave is added to a limiting system (using a fixed power rail to play music). At this point, the signal begins to limit. If you drive a signal beyond the limit, the waveform starts to look more like a square wave. In the frequency domain perspective, we began to get the input signal harmonics. Due to the emergence of a large number of clipping, harmonics appear higher amplitude. Now, if you use a passive crossover, many high-order harmonics can easily be played from the bass driver to the treble. As the high audio-oriented drive power is very low, so the damage caused by the probability is much higher. In many systems, this is a real problem, especially those that use simple analog processing (eg op amp, op amp) or NC analog EQ systems. Two better solutions are:

1. Dual power amplifier system

 If in a closed system, such as: an active speaker, etc., consider allowing your system to use dual power amplifier. The dual amplifier allows you to use a separate amplifier to drive the treble. The separation between the treble and the bass is done before the low frequency gain, which prevents the treble from damaging the high frequency portion of the clipped bass channel.

 The dual power amplifier system allows you to run most analog systems with a highly flexible digital adjustment function. The downside is the increased cost of the amplifier. However, we have to make a compromise between good passive crossovers and additional amplifier costs. The use of digital frequency dividers in digital-to-analog converters (DACs) or multimedia digital signal codecs (Codec) can alleviate this problem to some extent.