Home-made computer hi-fi stereo system

I don't buy in to buy the computer speakers, always use stereo headphones. Isn't afraid influence others, but always want a computer audio self-control system, because the house is a very good wooden box, idle already for a long time. Today I decide to start, it will come in handy.

As we all know, the power of the speaker directly in computer soundcards output jack is not to have power amplifier, the audio signal can be amplified speakers after push. Buying power? No, as a love "hands-on" computer enthusiasts, of course, to the DIY. More important is to save his money, buy a "power" as simply buy active speakers.

Okay, okay, just do it. While contemplating need something to electronic market side went for a trip. First bought a stereo amplifier, wanted to buy homemade components, ask the owner has finished, just ten yuan amplifier money, and it has good effect, he bought a piece. Check the chaozhou, guangdong is an electronics company. The former stage is NE5532 op-amp (a few years ago, after very famous) is 2N3055 high-power tube, as long as connected to the power source and the speaker can use. Then according to the voltage amplifier board 20V bought a ring type transformer, 2million (figure 1), because the ring transformer can effectively reduce ac noise, to obtain the bass, power surges of bigger. Finally bought two meter box, with ordinary wire line, but also can get good quality is to spend two dollars.

Home to find a waste of the stereo headphone plug wire, even down to spare, and make a strip plug cord. Ha ha, all things, only. Use the power output of the board or the welding line of input, the speaker on the weld line headset (see chart 2). Then put in the power transformer, the input of transformer 20V output in the plate on the power input amplifier (figure 3), accomplished. Need to pay attention to track the input and output are around, don't mistake. This assembly should be finished, noise, but not all wrong, there is no shells are on the table? The active on the market to imitates the sound, all the components are placed in the shell, not willing speakers are afraid of destruction, open the box, sound effects. Tightness Finally find a cd-rom box when shell (as shown in figure 4), you can get a better future.

With excitement, the speakers in line, stereo speakers plug on computer soundcards the audio output, then insert the power amplifier soil. Open a computer, after 10 seconds, and finally came anxiously for the familiar Windows startup of the voice, I cringed, original volume too large. Adjust the volume, some familiar MP3, really good permeability, high clarity, bass, not the kui is good overtones, without a boom. About friends moved to his pride, compared with the original box, feel my soil dynamic bigger, bass sound.) Calculate cost, total spent $35, overflow. If the reader friends, no speaker spent 200 yuan to buy a wooden box is very worthwhile, after all the homemade audio system is 200 multivariate active speakers can match.