音箱升级2（Sound box upgrade 2）.docVIP

音箱升级2（Sound box upgrade 2） To upgrade your speakers now (because the speaker is made, it is still my friends friend, for example) the speaker also is the innovation companys products (SBS38), the box is a plastic shell, can be active and passive conversion (can use a dry battery), no tweeter, each the speaker only uses a full frequency magnetic speaker 3W. The sound amplifier has been upgraded to rub the past, it has simply not qualified for the plastic shell, open a larger volume will make strong vibration and sound box shell distortion. So I decided to make a pair of new boxes with two 7 iron biscuit boxes (also available in boxes with thicker boxes and, after all, small speakers). The first method is pouring in the box on the walls around 1CM thick (dry thickness) Pu (commonly known as foam or black and white, can be in the home appliance repair department to find more solid foam box). It can effectively reduce the harmful standing wave, then the panel in front of the box body (the bottom of the box) dig horn hole and the horn with four bolts (the original sound box loudspeaker) fixed; edge along the horn and then some hot melt adhesive firmly fixed on the box body; then in the two box after the plane (He Gai) the opening of a 30MM diameter hole and pour with cans of aluminum skin homemade inverted tube fixed (AB glue). After two buzzers (also available 3W tweeter do tweeter speakers) and two as shown in Figure 2 the sound frequency divider to speakers, each enclosure with a scaffolding can be used directly, without using PCB plate welding. The circle around the 70 1mm2 line in the motor inductance is available with 25mm. After the bodiless and fixed capacitor voltage to 65V or more, the box cover is closed and sealed with hot melt adhesive. After all the above work is finished, the author runs the sweepgen software test and finds that when the volume is up to 50%, the speakers can hear the test signals between 20HZ and 16KHZ. Although my listening is good, but h