Take my word, swap different tubes in and the bass will vastly improve. The bass is a strong point of this dac in my experience. I rolled Mullard 4003 12AU7's, undeniably one of the best 12AU7's if not 'the' best, and a tung-sol 6x4. The 6x4 made a world of difference and brought a good bit of transparency to the sound while the mullards added warmth and richer bass. This DAC embarrases my previous DAC, being an oppo 105. I couldnt stand to listen to digital through that grainy, piercing vile piece of equipment. I now listen to digital 80% of the time, as it is that good.