1)立體聲線路輸入插口（STEREO INPUT,LR）是兩個6.25mm TRS插口，用以接受平衡和非平衡的立體聲聲源，如合成器，cd機，立體聲話筒等，采用平衡輸入可以減少噪聲和干擾，若采用非平衡輸入，要使連接線，盡可能短，將連接線引入的干擾減到小，若是單聲道聲源，則插入左聲道，信號自動分配給立體聲左右聲道。
1) Stereo input (LR) is two 6.25mm TRS sockets to receive balanced and unbalanced stereo sound sources, such as synthesizer, CD player, stereo microphone, etc. balanced input can reduce noise and interference. If unbalanced input is adopted, the connecting line should be as short as possible to minimize the interference introduced by the connecting line. If it is a mono sound source, The left channel is inserted and the signal is automatically allocated to the left and right stereo channels.
2)輸入靈敏度，輸入電平選擇開關，大多數設備均采用+4dbV的輸入和輸出電平，但準的卡座等設備采用的是-10dbV（HiFi系統中的100mV）的低電平，該開關允許將立體聲輸入與標準值相匹配，以保證的信號質量，抬起輸入電平選擇開關時為+4db，按下為-10db。
2) Input sensitivity and input level selection switch. Most professional equipment adopt the input and output levels of + 4dbv, but quasi professional card holder and other equipment adopt the low level of - 10dbv (100mV in hifi system). This switch allows stereo input to match the standard value to ensure the best signal quality. When lifting the input level selection switch, it is + 4dB and pressing it is - 10dB.
3)平衡（BALANCE），該旋鈕為雙聯電位器，用來設定送入的左右聲道的相對電平，以確定該信號源在立體聲聲場的聲像表現，當旋鈕設定到全左或全右時，音源的信號只有左聲道或右聲道的信號送進母線。
3) Balance: the knob is a dual potentiometer, which is used to set the relative level of the input left and right channels to determine the sound and image performance of the signal source in the stereo sound field. When the knob is set to all left or all right, only the signals of the left channel or right channel are sent to the bus.
4)推拉衰減器，該推子可以同時對立體聲通道上的兩路信號的電平進行平滑的控制。
4) The push-pull attenuator can smoothly control the levels of two signals on the stereo channel at the same time.
編組、輔助部分
Marshalling and auxiliary parts
1)編組輸出插口，滿足實況演出的樂器分組或驅動，多組揚聲器在錄音時，編組輸出插口，可接多軌錄音機，為交流聲而進行了基地補償和阻抗平衡，進行立體聲編組時，奇數編組被分配到左聲道，偶數編組被分配到右聲道。
1) The marshalling output socket can meet the grouping or driving of musical instruments for live performance. When multiple groups of speakers are recording, the marshalling output socket can be connected to multi track recorder to carry out base compensation and impedance balance in order to eliminate AC sound. When stereo marshalling is carried out, odd marshalling is allocated to the left channel and even marshalling is allocated to the right channel.
2)輔助輸出插口，將輔助母線上的信號送出調音臺，連接下一級信號處理設備，輔助輸出信號，一般有兩種用途，一種是將信號送到擴聲系統的舞臺返送監聽，此信號在演出中通常不作過多的調整，因此多取自推子前輸出，另一種是用于連接其他信號處理設備，將信號進行適當的處理后，再從主控部分的返回窗口，或利用一個輸入通道接入調音臺。
2) The auxiliary output socket sends the signal on the auxiliary bus to the mixer and connects the next level signal processing equipment. The auxiliary output signal generally has two purposes: one is to send the signal to the stage of the sound reinforcement system for back monitoring. This signal is usually not adjusted too much in the performance, so it is mostly taken from the output before the pusher, and the other is used to connect other signal processing equipment, After the signal is properly processed, it can be accessed from the return window of the main control part or an input channel to the mixer.
3)編組插入插口，用于在編組推子前插入壓限器，圖示均衡器等設備的處理效果。
3) The marshalling insertion socket is used to insert the pressure limiter in front of the marshalling pusher to illustrate the processing effect of equalizer and other equipment.
4)效果返回輸入插口，外部信號處理設備的返回信號輸入端口，經必要的電平調整后，信號直接送入母線。
4) The effect returns to the input socket and the return signal input port of the external signal processing equipment. After necessary level adjustment, the signal is directly sent to the bus.
5)輔助主控，將從輔助輸出母線提取的信號進行電平補償，得到所需的輔助輸出電平的大小。
5) The auxiliary master controller compensates the level of the signal extracted from the auxiliary output bus to obtain the required auxiliary output level.
6)混合（L-R）、中置（C）把編組接入混合母線或中置單聲道母線。
6) Hybrid (L-R) and central (c) connect the marshalling to hybrid bus or central mono bus.
7)編組衰減器，用于控制編組的輸出電平，正常作業為0db。
7) Marshalling attenuator is used to control the output level of marshalling, and the normal operation is 0dB.
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