A Passive Phone Speaker Amplifier is a device specifically designed to amplify the sound coming from a mobile phone without the need for any power source. 

As a Passive Speaker, it relies on acoustics and material construction to naturally boost the volume of the phone's audio output. This type of speaker is commonly used to enhance the sound quality for group listening or in situations where the phone's built-in speaker may not be loud enough, especially where a power source used by traditional speakers is not available, such as at the beach, the park, at a BBQ etc. It serves as a convenient and portable solution for improving the audio experience when just using a mobile phone. Has to be heard to be believed.

This model is designed in a classy art-deco style whilst retaining a compact and practical dimensions. It's the second iteration of this speaker after the success of my first one which was cubic, with this one being all about the curves.

The amplifier is capable of holding phones up to 13mm thick and 85mm wide.