Power supply and location processing
Many of the filtration waves are small, sometimes about 1,000 μf, and have a cbb with a . 22 μf on both ends, which not only reduces the static noise of the work, but also increases the transient power of the work at large dynamic times. Some of the credits, even after the above treatment, are noise, which may be inappropriately located, and the general location should be selected near the filtering cap, using the “one-point-to-one-place approach”。
Matching of the blocker coefficient
Kd is defined as: kd = kd-rated load resistance (equivalent to a soundbox rated resistance)/kd-output internal resistance。
The kd value determines the amount of electro-retarded nitrics to which the soundbox is exposed, as the internal barrier to the discharge output has in fact become the electro-retardant device for the soundbox. The greater the kd value, the greater the electrical resistance, the better the kd value, of course, the greater the kd value, which overwhelms the sound box, so that the pulse front builds time growth and reduces transient response indicators. Therefore, the kd value should not be pursued unilaterally in the selection of merit. An empirical value for use as a household hpv is required: a transistor application kd value greater than or equal to 40 and an electronic application kd value greater than or equal to 6。
The greater the value, the better, the more commonly expressed in (s/n), the fractional value of the ratio of the signal power ps to the noise power pn, the s/n=10lgps/pn=20lgvs/vn(db), the signal voltage, the vs and the noise voltage, respectively。
The noise ratio increases with the input signal level and increases with the input signal level, but remains essentially the same when the input signal level reaches a certain value. In accordance with the high level of authenticity requirements, it is preferable to have more than 90 db, and imported machines can often be as high as 110-120 db, whose performance is understandable. In any case, the greater the noise, the smaller the noise mixed in the signal, the better the quality of the sound so that the music could be clean and hierarchical again。
Interdiction coefficients, mainly for low frequency, are very important technical parameters that directly affect the low sound quality. It is well known that the bigger the horn, the better the bass, the better it is, but often the sound is not natural, especially with a low frequency of 100-400 hz, which tends to colour the sound and makes it sound very natural。
In its design, engineers take a number of technical measures for performance, such as the choice of multiple tubes combined, low internal resistance (meu level) large power tubes, increased working voltage, selection of high-quality wires, etc., and vigorously raise the resistance coefficient so that it can act in a manner consistent with the horn, produce an “ecstasy” effect, synchronize the movement of the sound basin with that of the audio signal, and restore the sound basin to zero (i. E. The central position) as soon as possible after the end of the drive signal, the effect of which is damp factor, d=rs/ri, rs=phone resistance, ri= power output internal resistance, d & d, the better the sound basin and signal synchronization, the cleaner the lower the sound, the better the more the impact。
