Production of electronic three-way power amplifier

The speakers connected to this kind of power amplifier no longer need an LC crossover for frequency division, and it has inherent advantages. The RC circuit has high frequency division accuracy
, phase shift and other indicators. The calculated value and the actual value overlap very well, and the high, medium and low channels are completely separated. It eliminates the large loss inductance between the power amplifier and the speaker
, which is extremely beneficial to sound reproduction, especially in terms of sound field shaping, air feeling, and sound image focusing
. The C power frequency divider has been significantly improved. Although the cost is higher using this method, debugging is extremely simple. This
is indeed a wise choice for welding machine enthusiasts.
    In this power amplifier, for the front-stage RC electronic frequency divider, high-quality components should be used as much as possible to assemble it.
The operational amplifier model used in this article is OP275. All small-capacity capacitors use Philips high-precision, low-noise resistors. If conditions permit,
British H(')LC() resistors can also be used, which will provide better results.