I see you have a Yaqin MS-23B phono preamp. I'm using one too! I replaced the stock tubes with Sovtek 12AX7-LPS. These tubes have a warmer richer sound to them, more balanced from top to bottom. The stock tubes are more forward sounding. The Yaqin is a bargain at it's price point! Was using a Cambridge 640P phono preamp before the Yaqin. Yaqin is way better than the Cambridge!