加的什么炮呢。我用的rel r528,12寸,主箱10寸落地。加了以后中高音变得润泽,即使音乐没有低音。老外评价也是这样The REL not only adds serious low end, but fills in the all-so important midrange, along with adding air to the highs. Even full-range speakers that go down to 20Hz can benefit from a REL being added to the system。