there seems to be some merit in not putting the volume to full on the hlly... my hlly90 is set to about 1 oclock, that seems to yield the best results with the caiman as a pre to it... of course with the hlly20 you have less power to play with, but i would start at 1 and see how much more power you need.
using an active pre might give more to the sound too... i was using a passive pre and a separate dac for a little while, but with the caiman it sounded better...
(im just using the volume control on my pc with it at the mo... that doesnt sound as good either ... but it might be the crap dac im using ...)
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