Pascal driver small subwoofer

During actual production, the original high-fidelity power amplifier (rated power >30W) system can be equipped with
the Pascal amplifier shown in Figure 9-53. IC1 is TL072, TIJ082, I.M385 and other port filter networks. The resistance and capacitance components of the filter network have strict accuracy requirements, so
precision metal film resistors and polypropylene capacitors can be used; IC2 is TDAI5 14A. Equipped with a large area wing-shaped radiator. Other components can
be selected from high-quality products based on the diagram data. The treble and bass units are Yindi YDQG4-1 (20W, 8,0) and YD200-127X (40W,
8fl) respectively; the driver ( speaker ) YP uses Yindi YD131-54 (ZOW/8f2). The cabinet is carefully made of medium-density fiberboard, and the inner
wall can be pasted with sound-absorbing materials.
    After the production is completed, it should be noted that the vibrations of the driver (speaker) and the woofer must be out of phase. Otherwise, the wiring of the driver
6 must be reversed and the RP must be adjusted so that the amplitude is slightly smaller than the amplitude of the woofer . Subjective listening can be performed until the bass and overall sound quality are both good
    . "Watching it a hundred times is worth hearing it once." The powerful bass and slender, bright treble will make people mesmerized.