Hello Amir, if possible I would like to have a review on the E1DA Powerdac. I think this 80$ DAC/ESP/Headphone is a unique proposition in the head-fi market. The only thing coming close in functionality are RMI ADI DACs which are at least 10 x as expensive. I have both: the RMI ADI 2 FS sounds better to my ears but the value proposition E1DA Powerdac 2.1 is unbeatable according to. I would send it to you for testing but for the shipment cost, I could buy a second one - I live in Europe. TNX in advance. Keep the good work up. Bernd