…is quiet a challenge. Most portables are carrying inbuilt DACs which are not really state of the art. The impedance matching with headphones in most cases is also an issue. The AK 120 using two Woolfson DACs provides quite a good sound. Nevertheless I was not satisfied with the result of the Master Tape Copies I had transferred to microSD cards and put into the AK`s slots.
When looking at headphone amplifiers with an inbuilt DAC you usually end up with an USB DAC. There are good ones, also affordable ones like the Ifi Nano which is able converting DSD and DXD formats. But most units don`t have an optical input, cannot take the digital signal of my AK 120.
The TEAC HA-P50 has an optical input, does take S/PDIF signals, and also offers a microUSB and USB input. It works with 24bit/192 KHz and therefore is the ideal candidate bringing my 24 bit/192 KHz files from the Tascam recorder to blossom. And this is indeed what he does!!!
Connected with the Bayerdynamic T-5p headphone the sound you hear via the TEAC is astoninglishy deeper and better structured than from the AK itself. For me it is a revelation.
The TEAC`s battery lasts at least 12 hours, the AK`s battery needs to be charged much earlier. On one 32GB micro SD card I do record over 12 hours music in a High Definition Format.
The sound is just great and really High End… on the road