Looking at a Samson QH4 4-channel headphone amp ($69.99). Has 2-TRS inputs that should work with the 2-TRS line outs on my Tascam US-2x2 interface.

This isn't available through my local stores, so I'd have to go Amazon ($10 cheaper) or Sweetwater.

I've read mostly good reviews - one person seemed to have a defective unit, the rest were very happy.

Does anyone know of any perilous pitfalls with this unit?