Production of SRS active antimagnetic speakers 02

(2) Tone, power amplification circuit, power supply, and speaker protection circuit are shown in Figure 9-77. This tone control circuit is
a standard high and low tone negative feedback control circuit. In actual use, it has the characteristics of wide control range, low noise, low distortion, and
very ; ZRP1 in Figure 9, 77 is the bass adjustment potentiometer, and 2RP2 It is the treble adjustment potentiometer, and 2RP3 is the volume
controller. In order to isolate the influence of the tone circuit on the preamplifier signal , this design adds
an emitter output circuit composed of 21C1 in front of the tone circuit, thereby ensuring good signal transmission. In Figure 9-77, 31C1 and 31CZ are the I-M1875T power amplifier module of NS Company of the United States
. This module and its peripheral devices constitute a DC-based power amplifier circuit. The DC-based circuit makes it
powerful and powerful when it is angry, and the bass is thick and powerful. , the treble performance is clear, natural and sweet. The power supply and speaker protection circuits are
too simple and will not be described in detail here6