The LM-mini84iA is a compact integrated amplifier specifically built to match with headphones. EL84 tubes are used in a single ended design to deliver 3 watts per channel.
 
The LM-mini84iA can be inserted into any existing system between a source and amplifier to provide a fantastic sounding headphone signal. For example, it could be used between a DAC and integrated amplifier, passing the signal through to the main amplifier and speakers when not in use.