iPhone 4 unpowered amplifier
By Ben on Thu Oct 21 2010
iPhone 4 unpowered amplifier
Gear  |  Apple
"Slip the BONE Horn Stand onto your iPhone for lo-fi amplification simplicity.

Using old-fashioned acoustical science, this silicone stand adds 12 decibels of sound pressure to your iPhone's speakers without asking for an erg of battery juice.

You can also use it to prop your iPhone into a vertical or horizontal viewing position.

For iPhone 4 only — not 3G or 3GS. "
Green, Black or Bone: $24.95 (iPhone not included).
Source   |   Price: $25   |   BUY
  
#1 Post by mrmeval, on Thu Oct 21 2010 10:14 AM
I've made one for my Samsung Vibrant which sounds terrible by itself. It's a cardboard resonator and re-director and is similar to that without the tacky round horn. It just sits behind the unit and has an opening of about 1/4" along one edge.
Your Name: (* required)
Your Email: (never displayed, * required):
Your Message: