Toroidal Transformer Little bear T10 Pro 6N2 tube valve Phono Turntable RIAA Preamp preamplifier Ver2.5 Newest version.upgrade 02-Oct-2016-For MM (Moving-MaganeticCartridge) turntable only.not support MC truntable yet. and package 6N2 tube. Acrylic box version, WITHOUT power cable. Weight:1.95KG, Size:256*190*70mm(10.07*7.48*2.75inch) PCB is finished and all electronic components are already soldered. The panel and transformer and case, you will need assemble by yourself to complete the unit - easy work! after you can using it. 1,re-design the Gain swtich function. before ,it was through adjust output voltage to reduce output signal.and now. we through control V1 tube to setup Gain TOP NOTIC:For solve hum problems that some buyer respond to us,follow is the suggesion:.when you listening the music, use your finger touch this GND point. if the hum come to lower. that's mean your T10 not connect to really ground. please re-connect it to really ground.that's important