Wall Mounted Baritone iPhone Speaker
0Passive amplifiers are wonderful for increasing the sound coming out of your phone without electricity. Take this Baritone iPhone Speaker for instance: it is an acoustic sound amplifier that you can hang on the wall. It works like a megaphone, amplifying the sound through its horn.
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To get started, you just have to put your phone in the appropriate slot. InstrumentalAudio is selling this handmade item on Etsy. You can find out more about it here.
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