I upgraded the wa3 to the 5998 and the headroom on that tube definitely makes a difference. I feel as though the other tube sounds colder and more analytical in comparison to the original 6as7 tube that came with it. Huge recommendation to tube roll this guy. I don’t recognize the DAC either. I...

Allright so i am looking for a really nice sounding portable headphone amp with very solid bass, and good clarity with clear highs. I would rather not go over the 100 dollar range but if you must dont go too far above. Does anyone have any info on exceptional sounding portable headphone amps...