Want a portable tube amp that sings?
When I first got this little amp I knew it was something special, looking through the little glass port, I could see some very high end components on the board. The sound: detailed, wide soundstage with clear sweet midrange. Adds a whole other dimension to my headphone listening. One point of note: turn the gain up only a bit on the amp, turn your source to 75 to 80 percent volume....then turn up the amp to your desired volume level. Using this method I had a jet black background. For the money vs quality, I cannot say enough good about this!!