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How to DIY a speaker
Dec 06, 2017

1. Use the medium density board (MDF) or high quality log, which can also be used to make box body of granite and concrete. The plate thickness is about 15mm ~ 25mm. If the thickness is not suitable, it can also be made of double layer material.

2. The speaker unit selects the appropriate unit caliber to understand the technical parameters of the unit. It is best that the manufacturer has "paired" units to ensure performance consistency.

3. The principle of box production is that the internal volume (net volume) and the design value are the same. The design value is based on the specific speaker unit, which is calculated by the relevant formula. The length, width and height of the box can't be integer multiples, and the appearance should be taken into consideration. Therefore, it is necessary to deduct the volume of the added asphalt slab or inner asphalt.

4. The basic requirements of the box are sealed and firm, so when making, the joints should be arranged in a neat way, so that the glue can not leak and the nails should be nailed. If the contact is made into a wedge, the adhesive tape should be strengthened. On the side and front panel, a strong reinforcement (such as a 30mm x 40mm hardwood) should be used.

5. When installing the frequency divider, if the pitch plate or asphalt is used, the screw can be used directly. Otherwise, the soft insulation pad should be used between the box divider to keep the tightness in order to prevent the vibration coupling between the box and the box, thus reducing the interference. The connection line shall be made of high quality oxygen free copper wire, retaining the proper length and trying to fix it to prevent its large swing.

6. When filling and absorbing the sound box, the closed box can be used for the use of wool and sponge; The inverted box can be used to fill the inner surface of the entire inner surface with a thickness of about 25mm, and is properly fixed.

7. The speaker unit is best to dig deep hole installation and use rubber gasket to isolate the transmission of harmful vibration. When fixing the unit and the junction box with self tapping screw, the prehole should be drilled in the box body first. The pre-hole should be smaller than the screw, so that the installation is easy and beautiful.

It is best to use "twin-line sound". At this point, the short circuit of the terminal box should be removed, and the "+" and "-" polarity connection, which is commonly referred to as the "bi-wire connection", should be used for the "+" and "-" polarity connection in the left and right sound channels of the amplifier. "Two-line split" can greatly reduce the crosstalk of low pitch to high notes, and its effect is obviously better than that of traditional single line connection. In conclusion, the production of speakers is a more detailed and complicated process, not to be eager to be successful.

9. Be sure to pay attention to the "+" and "-" marks of the unit and the frequency divider, and connect the connection with positive and negative ones. When welding, it is better to use high quality silver tin, and can not show false welding and unsoldering.

10. The surface of the box can be treated with real wood veneers or PVC plastic veneers. It can also be sprayed with color according to personal preference. The requirement for the veneer is: tight and no air bubbles, smooth and no creases.