Speaker Too Weak On The iPhone? Get The SoundClip
The SoundClip promises to increase the iPhone speaker’s amplitude by about 10dB between the frequencies of 5kHz and 20kHz. It plugs directly into the 30-pin dock connector and instead of actually amplifying the audio using power it utilizes the magic of a tuned conical deflection chamber to direct the audio toward you as you play games, listen to music or watch a movie.
You can buy the Soundclip here for $8