M-Audio Bass Traveler Portable HeadAmp (Two Outputs) for $29

If you are looking for a Fiio E6 type of size portable headphone amp, but two outputs (can connect two headphones) are a must have feature, the M-Audio Bass Traveler Portable is now going for $29 at Amazon.com by Amazon actual. It averages 4.6 out of 5 based on five customer reviews. Has a “Boost” option (Flat, M, H), charges via micro-USB and officially supports 16-100 ohm headphones.