Ken at ALO has one with the power supply and it sounds great. I just returned it to him. We have done thousands of dollars of business. He let me compare it to my collection of amps. The reason I returned it was because I was going to replace my HeadRoom Micro Stack I use in my car with it. I drive with sony pfr v1 open air headspeakers. Those strange ones with speaker balls that don't cover your ears. The amp is really stunning but has no synergy with the Lisa. If you click on my headfi logo you will see I have a unbelievable amount of gear. Over 20 headphones and twice that in home and portable amps. All modified. It had no place for it in my house. I think he wants 650 for the amp and power supply but he will probably take $600. He owns 2 of these. Please do not tell him I said that. ALO is AudioLineOut headfi sponsor. Really it competed with $2 to $3000 home amp quality units.