Author: Tianling Shuai Shuai
Recently, I really like tossing, soaked in a lot of forums, I found that using the LM1875 amplifier sound is very good, I will plan to use it to DIY, so I will put some relevant accessories on Taobao, do "biscuit box" amplifier. The list of accessories is as follows:
1. 100W dual 12V ring cattle (with pressure plate and rubber gasket) one (75 yuan)
2. LM1875 amplifier plate 2.1 (25w * 2 + 50W with fixed copper column terminal) 1 (90 yuan)
3. 3 Power Filter - Import 10A250V One (5.8 yuan)
4. High-grade stainless steel strip light switch blue light (30 yuan)
5. Six of the pure bronze gold power amplifier output terminal (40.8 yuan)
6. Pure copper gold-plated input RCA (Taiwan production) six (21.6 yuan)
7. Aoyian West Cake Box (thick paper) one (0 yuan)
8. Self-made cycloprel transformers under pressure plate (bicycle accessories and hard disk disk) set (0 yuan)
9. After the chassis, the interface is reinforced one (0 yuan)
10. Connect wire small amount (10 yuan)
Total: 273 yuan is not included, the postage estimates that there is no more than about 50 yuan, the material is not much, but full of flowers, and use a lot of tools.
It took almost three days before and after, because the accessories.
After doing it, start the audition, the volume is the largest, no bottom noise, I still worry about walking very unreasonably, there is a bottom noise, but this way is listening to friends, I don't say it, the power line should be separated from the signal line, how much will be Impact, just not feel. This work is strange, and the three potentiometers are control the total volume, treble, bass, but find any one of them will change the volume. I feel too uncomfortable. I thought that the treble was controlled to the treble volume. The bass is controlled by the low sound volume, the total volume is the total output, I can only open the high volume to 50%, the total volume opens 9 points. The subwoofer is still not connected.
Keyboard tray track, used to make the chassis back interface to strengthen the gluten
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Do a good job
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100W double 12V ring cattle, top is a homemade pressure plate
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This is a pressure board coming to buy when you buy a ring.
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The full set of ring cattle, the lower left corner is a hard disk disk, 5 in the lower right corner is the accessory of bicycle front fork, one for the use of fixed cycling, and the other 4 is ready to do the chassis feet.
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On the right is a well-processed fixed ring cattle.
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The LM1875 amplifier board bought online, 2.1 channels.
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The pure copper ferrin power is output terminal, 6 pure copper gold plated RCA, standard 3 power supply filter-10a, and a all-aluminum knob is useless, because the seller did not give screws.
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Austrian coast box
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Digging the rear panel input output interface hole
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Install an input and output accessories, not fixed.
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This is a fixed rear panel all accessories. The above three screws are locked to reinforce tendons, strengthen the ribs, without this reinforcing, when the wiring is connected, the box will deformed, so that it is not strong.
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A lamp switch and three volume knobs of the front panel.
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Flat
Internal component mounting layout, yet welded and fixed
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Welding input and output accessories, the number of electric iron watts is too low, the temperature is not enough at the welding output head, so the welding is not good, and the soldering iron will be soldered again.
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Welding is fixed in the interior map of all parts, and the three input switches are installed after the space is planned.
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This is the bottom, you can see the lower pressure plate for ring cattle, and four fixed screws of four amplifiers.
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Vertical rear panel
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Horizontal front
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Boot state, with the lamp switch blue, the actual effect is better than the photo.
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Off state
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The four feet have not been installed, just use it first, and the first time I feel good, I have to listen to some time, I know it is good.
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