Believe comparing of a confusion of voicesCall dispatch a confusion of voices to compare again, namely of the outputs signal voltage of amplifier and the noise voltage that output at the same time than, often express with decibel number. The noise that the letter a confusion of voices of equipment produces than making clear it higher is less. Generally speaking, letter a confusion of voices is bigger than jumping over, explain the noise that is mixed in signal is less, sound answers put phonic quality taller, Output powerThe output power of power amplifier is worth. Output power does not have absolutely influence to acoustic quality, but the control force of loudness of audio of impact of can older rate, loudhailer. Have power of RMS(Root Mean Square) and power of PMPO(Peak Music Power Output) normally two kinds tag a method, RMS is the statistical means that seeks average, PMPO is the algorithm that seeks peak value, because of this PMPO power the value looks very breathtaking, PMPO power can be used as the annotations information of RMS power only, and power of many PMPO of plant family expenses go cheating customer. Input interfaceThe commonnest input interface is RCA and 3.5 stereo electrical outlet two kinds. RCA common calls lotus the head, each track is inputted independently, contact firm * , osculatory area is large. 3.5 stereo electrical outlet is multi-purpose at relatively cabinet sound box, the biggest advantage is managing position and operation go to the lavatory. Output interfaceJoin satellite box prepares Chinese medicine by roasting it in a pan to bass or join bookshelf box advocate the interface of deputy box, unit of the many link that be called or output interface. Have clip of 3.5mm electrical outlet, RCA electrical outlet, butterfly and wiring post commonly a few kinds. 3.5mm electrical outlet, RCA electrical outlet basically is used at signal communication, but very much now the output that also leads sound box with Yu Xiaogong. Be in in when high-power is outputted, still give priority to with butterfly clip and wiring column means. Distortion factorCent is intermodulation lack fidelity with total harmonic lack fidelity of a few kinds of types lack fidelity. Usually, distortion factor should go after lowest to change, but also have exception now and then. Vacuum tube machine is lack fidelity very big, but a lot of people love to listen, because person side is right of vacuum tube machine occasionally second lack fidelity not sensitive. Passageway depart is spentThis index decides the segregation capacity that disturbs each other between each track, the cost has been jumped over higher, the cost is higher, built sound field can appear wider, listen to phonic fixed position the meeting is more accurate. Frequency is answeredFor example 20-20kHz(is losing 3dB) . 20-20kHz states this equipment can give out 20-20kHz paragraph signal, this Duan Pin leads limits of the frequency that be called, and when losing 3dB to express to issue 20-20kHz signal, the amplitude of signal intensity is in fluctuating inside negative 3dB. Pure tagging frequency limits is the behavior that is without a meaning.
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