Now some electronic enthusiasts are interested in hobbies and things like computer assembly, homemade speakers, homemade lights, etc. If you are interested in this area, if you can, try this yourself! For everyone to introduce how to DIY homemade audio .
Preparation: wooden box homemade, transformer 2 Anshuang 12 volts, 30 yuan; TDA2030, 2, 5 yuan; bread board 1 piece 10 yuan; 8R25W speaker 2 40 yuan; other components are as follows: 1K.22K.10K.47K .100K.33K.680R each of five resistors (extra), 0.1uf.10uf.3300uf.1uf.22uf capacitors; 101.102.104. five ceramic capacitors; two 224.472 ceramic polyester capacitors; 4007 diodes 8; 6 square CM heat sink 1; double column potentiometer 2; shield signal line 2 meters.
DIY homemade audio steps 1. Speaker unit select the appropriate unit diameter, understand the technical parameters of the unit, preferably the manufacturer matching unit to ensure performance consistency; the acoustic material should use medium density board (MDF) or high-quality logs with high density, Granite and concrete can also be used to make the box. The thickness of the plate is about 15mm-25mm. If there is no suitable thickness, it can be made by double-layer material.
DIY homemade audio steps 2. The principle of sound box production is the inner volume (the length, width and height of the box can not be integral multiples, and the appearance of the appearance) and the design value (for the specific speaker unit, apply the relevant formula Calculated to be the same; if considering the addition of asphalt or inner paving asphalt, the volume should be deducted; the box requires a firm seal. During the production, the seams should be neatly mated, not leaking, and nailed. Nail; if the butt joint is made into a wedge-shaped bayonet, it should be glued and nailed to be more firm and strong; on the side and front panel, strong reinforcement should also be used, such as: 30mm*40mm hard wood strip.
DIY homemade audio steps 3. When adding the speaker cotton, the sound of the closed box design can use wool, sponge and other materials; the inverted box can use the sponge about 25mm thick to fill the entire inner surface, and properly fixed;
Diy homemade audio steps 4. When installing the crossover, if you use asphalt board or asphalt, you can use the screws directly; or use soft insulating mat between the cabinet dividers to keep the tightness to prevent Coupling vibration with the box to reduce interference; the connecting line inside the box should be made of high quality oxygen-free copper wire, keep the proper length and try to fix it to prevent it from swinging a lot;
DIY homemade audio steps 5. The audio speaker unit is best to dig deep hole installation, and use rubber washers to isolate harmful vibration transmission. When using self-tapping screws to fix the unit and junction box, you should first use the electric hand drill on the box. Hole, pre-hole is slightly smaller than the screw for installation and aesthetics.
Diy homemade audio steps 6. When wiring, be sure to pay attention to the +/- mark of the unit and the crossover, the installation is positive, negative connection method; when welding, it is best to use high quality silver tin, and can not appear solder , off welding.
Diy homemade audio steps 7. The surface treatment of the cabinet, can use real wood veneer or pvc plastic veneer, can also be painted, the color depends on personal preference; the requirement to lose the veneer is tight, no bubbles, smooth and no wrinkles.
It is best to use two-line crossover when making the stereo. The short-circuiting of the four-terminal junction box should be removed. The two-wire corresponding "+" and "-" polarities are connected from the right channel of the function, that is, the Bi-Wire wiring method. This two-line split method can greatly reduce the crosstalk of the bass to the treble, and the effect is obviously better than the traditional single-wire docking method.
Audio production modification needs to pay attention to the circuit problem. In the production, the power cable, audio cable and signal cable should be separately installed. The circuit should be shielded and protected. The DIY homemade modified audio is generally a gradual process, first change the speaker, upgrade the power amplifier, increase The woofer, and finally replace the host; it is best to reserve the upgrade space, gradually upgrade, and finally upgrade the host with strong resolution, can achieve the HIFI sound quality effect.
In addition, the sound production should pay attention to the selection and wiring of the wire, the installation and warranty of the equipment, waterproof, etc., the foundation is done, in order to achieve twice the result with half the effort.
With the North American Canadian market on the safety level requirements are too high, the wiring can not be exposed, so now produce some aluminum box or iron shell packaging power supply for panel lights, troffer, can also be used for industrial electricity, 100 -347V input. Waterproof level is low, so for indoor dry environment.
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ShenZhen Fahold Electronic Limited , https://www.fahold.com