The place of the sound box of high sound is so great, because want to show low frequency acoustic quality,be, deploy bigger dynamoelectric loudhailer with respect to need.

• 高级音响的音箱之所如此大,是因为要显现低频音质,就需要配备较大的电动扬声器。现在,英国自动电话公司较好地解决了这一问题。