Ive had my cherry amp for about a year now and changed my preamp a couple months ago to the musica bella lusso preamp. The preamp was made By Bill from responce audio. Both digital amp company and responce audio seem to have the same company goals, cut the middle man and use that extra money on audio gear that preforms above its cost. The lusso preamp is packed with premium parts and combined with the dac cherry amp the sound is just amazing. Very natural and clear with lots of detail. I love the laid back sound the combo produces. There is an issue with a slight hum coming from the amp and into the speakers but it isn't audible from a few feet away so not much of a problem. Tommy said he could help me with it but right now it dosn't bother me. The preamp took a long time to break in but it seems to keep getting better. If you are looking for a tube pre to go with your dac amp I would recommend musica bella. I love my cherry amp and lusso preamp combo, thanks