不需要有听筒喇叭扩音器。
拥有一个听筒喇叭扩音器并没有什么了不起——直到您不得不拨打一个自动化电话系统。
Having a handset speakerphone may not seem like such a big deal-until you have to call an automated phone system.
除了这些优点外，喇叭选择器通过减少或平衡负荷还有助于保护扩音器免受损害。
Beyond these benefits, speaker selectors also help to protect the amplifier from damage by reducing or balancing the load.
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