With the great variety of headphone choices, it is only possible to achieve the best performance with a single headset in mind. You can not use the universal headphone amp concept with the Select level of performance. That is why we have built a dedicated Stax* headphone amp to be paired the the Select DAC.
The Select Headphone Amplifier has been designed to take advantage of the powerful DAC outputs. This allows it to achieve a level of headphone playback never heard.
If you are sharing the headphones with a two-channel system, use an internal bypass in the amp. Simply turn off the unit for the signal to be sent to your other system.