Thanks for your suggestions. Ljgj is right. I firstly hooked up directly from my EMC1 to Berning amp with volume control via single ended the sound was not transparent and high-and midranges sounded roll-off. Since I switched to XLR by using XLR interconnects(Granite Audio 470) to an XLR adapters for the amp the sound suddenly has a huge soundstage and having more high-and midranges and a sweet pot is up to the ceiling. I have also tried to use preamps(CJ-16LS, First Sound Deluxe MKII and Emotive Audio Erato)but none of them can match with the Berning amp.