I bought an Audio Note DAC 2.1 from Audio Note Kits about 5 months ago. I had it assembled (immaculately) by Digital Pete, who is officially sanctioned by Audio Note Kits to assemble their kits. I asked him if he could use the lower end Duelunds as the coupling caps, and he did so for an additional $400.00. I have to say to anyone who may have just added a Duelund cap to any component...be patient! It sounded good right away, and better in 2 weeks, but it is only after a little less than 5 months that I am finally hearing what they do when they are broken in. They are so natural sounding, and so worth the money.