Optimize headphones Tips

Usually one to pay the new headphones lack bass and sound strident lack of focus, drive unit This is because the electro-acoustic properties have not yet stable. Therefore strongly recommended that before you start listening to music with bass in a row to burn 24-48 hours. First of all, with relatively low volume pot a few hours and then medium-volume pot a few hours, followed by large-volume burn the remaining time. Burning headset headphone drive unit can improve the suspension system of the mechanical properties, and can more closely wound coil. On some headphones, such a change can be turned upside down. Wear a headset location It's easy to do, but you tried to adjust your headset the best position it? On a lot of headphones, sound field and sound balance is very strongly dependent on the location of headphone drive unit. Scientific research found that when the drive unit relative location of the entrance of the ear canal towards the former at the bottom of the depth of our feeling will be enhanced. This experiment will not cost you a single cent, may to a certain extent improve the sound on. Impedance optimization Headphone amplifier output is usually direct at speaker output on. In order to avoid damage to headphones and amplifier in series with resistors. The resistance of these resistors are usually at 200 between the EU and 600 in Europe. On the other hand, radio and CD drive headphone output OPAMP chips are usually driven. They have many low output impedance (less than 50 in Europe). Headphone jack output resistance R0 on the headset's voice has a great impact. It not only changed the headset on the voltage and changed the frequency of the corresponding sound. Headphone impedance Zphone (f) are changed with frequency, frequency of the sine wave signal f headphone jack will be the resistance R0 decay into Zphone (f) / (Zphone (f) + R0) <1. General headphone impedance Zphone (f) low-frequency at the most, and therefore low-frequency attenuation to less than high-frequency. Figure 2 demonstrated the Beyerdynamic DT931 and Sennheiser HD600 at 150 and 470 in Europe under the output impedance of the attenuation of different frequencies. Obviously, the low-frequency attenuation of less than high frequency. For most headsets, increased output impedance allows the voices of darker more mixed (at this time of headphone drive unit耳放control will become weak). However, some headphones (such as DT931) absolute at 120 Europe (This is an international audio standard) listen better. Therefore, if your headphones sound shrill, you may consider increasing the headphone jack the effective output impedance. The easiest way is in the headphones and the headphone jack add conversion between the head (as shown in Figure 3). Convert the first of each channel has a series resistance and headphones, effective output impedance is the resistance and the headphone jack and the output impedance (R0 + Ra). NOTE: The sheet resistance is greater than not to drive unit impedance headphones 3-4 times. Again large, then it would be difficult to achieve effective volume. If your headphones sound bleak turbidity, and are driven through the power amplifier, you may consider reducing the effective output resistance. This can also be converted through a first implementation, but this is the parallel of a resistor (Ra) in each channel. Effective output resistance is the resistance and the headphone jack parallel resistance R0 * Ra / (R0 + Ra). The resistance Ra of the resistance should be 0.1 to 1 times the resistance headphones to hear there is a difference. However, do not use too small of Ra, or you spend a lot of the power amplifier current signal can be enough sound pressure may have negative effects on sound quality. Besides, we also note that this resistance should be enough cooling power. Acoustic and mechanical damping (damping) In addition to the design of good headphones, the majority of closed-end headphones than their open-brother has a heavier tone dyeing. The main reason is the acoustic wave is restricted in our head and headphones closed cavity between the shell. Reflection and resonance of sound quality there is a lot of side effects. Special headphones are usually cheaper there is no sound-absorbing damping material, so put a small piece of sponge to the headset shell can be very effective attenuation of sound waves. But we know that the headset unit is required to breathe. Figure 4 suggest that you put a sponge on the top of the magnet drive unit. The number of damping material depends on your tastes and headphones, required tests. If you closed with your fingers tapping cheap headset earpiece to hear the sharp sound of plastic, which are mechanical resonance. You can try the attenuation of such mechanical resonance, with some noise reduction headphones Materials posted on the wall on the shell. But bearing in mind that acoustic resonance than the effects of mechanical resonance is much greater. For line Do you have a headphone cable you compare the diameter of the structure and those who really fever grade wire? If you're comparing, you doubt that you are not the voice of the nature of headphone cable. Headphone cable are for general comfort (weight, mechanical strength, flexibility, not to transmit mechanical noise) optimization. Generally, these lines of pure sound quality was very poor. Of course, comfort is the first, if you do not care about comfort, it still has great-for-line returns. The first question to be answered is what kind of line should I use? Selection criteria and non-mobile home-type audio connections are very different. It is important that flexibility and should not transmit mechanical noise. Very hard line rather annoying, because they will move when you have reached the headphones in noise. Weight are the second most important, if you want good sound, the diameter of 1 mm below the light line is not enough. My secret is that microphone cables are optimized for the above-mentioned requirements. I personally use a lot of the lines are "Belden 8413". It has two inner conductors and braided shield. Cotton and rubber insulation provided a good mechanical damping. Although a bit hard one start with one stick up stick up before many just fine. "Belden 8413" there is 5 mm in diameter, compared with the standard headphone cable so, quite heavy. If you歪着脑袋, line all the weight would be linked to a headset on, quite annoying. This can be done through many stay after the bifurcation point of the length to improve, so that the weight on both sides of the same subject. Do not use tape bifurcation put the following two-line stick together. I used a small rubber ring 5-inch 5-inch line put tied, so that more flexibility. Sennheiser Headphones HD600 such as using a special plug the line connected to the headphones on, and no separate plug retail. Usually you need to cut the expense of an original cable plugs. Like most headphones, Sennheiser headphones line with a large number of fine copper wire into a twist, each thin insulated copper wires are separate. Welding know-how is put head welding painted oil, then put hot hot soldering iron headband put up, Wait a moment, the insulating layer will melt, black, fall off. Then slowly moving down jerdonii wires, if all goes well, will head up a layer of solder plating, solder can be easily elsewhere. No line is perfect, the shorter the better. With gold-plated plug. It will not improve the sound but will prevent oxidation caused by poor contact.