It attenuates the output of the preamp in the same manner as you would experience with a “ passive preamp ” except that it has a precision 256 position 4 pole attenuator for both balanced channels matched to . 1 % 正如你以前见过的“被动前级放大器”那样，它能够衰减前级放大器的输出，并且它具有一个精密的256位4通道衰减器，可以令两个平衡通道匹配误差仅为0 . 1 % 。
