New preamplifier two box designed, one for power supply and the second one for preamplifier unit.This new product included : 1 balanced + 3 unbalanced inputs and 1 balanced + 1 unbalanced outputs.

• 因为各地物流的距离不同、商品体积重量不同；导致运费也不一样；我们很难统一送费价格；收高了不好；收低了成赔本买卖.；所以我们运费都采有到付的方式