The blue LED lights up when the power is turned on. There is no problem with either IN/OUT, regardless of which is set to IN (OUT). Centaur Buffer 【Specifications】 ・Case: 66 x 121 x 39 (height) mm ・Power: Center minus 9V ・PtoP wiring ・Junction Box: 5 LINE 【Customer Reviews】 "I think it's amazing that you can build something like this. It works great. ^_^" "I'm a repeat customer because it does such a great job." "The sound quality has improved and is wonderful." "It's been decided to be included on my main board. Thank you." "The sound became surprisingly good!! The sound image became clear, and it transformed into a sound with a crispness and sex appeal! It's truly wonderful! Thank you very much!!" This compact junction box houses the Centaur buffer section, which is reputed to improve and thicken the sound simply by passing through it. It allows you to consolidate the inputs and outputs of your board in one place, helping to prevent jack damage from plugging and unplugging. Since the buffer circuit is passed immediately after the input, you can make it compact without preparing a separate buffer. It is intended for continuous use, so there is no ON/OFF switch. As expected of a masterpiece. You can see why professionals are using the Centaur buffer. I tried it out by placing it before my vemuram Jan Ray, and the sound became thicker, the cutting became crisper, and the dynamics of the clean sound, with a moderate amount of distortion, increased even more, making it very pleasant to play. Overall, it gives the impression that the sound becomes more vibrant and energetic. You will feel the effect more as you play louder or as the number of your effectors increases. A buffer is not a piece of equipment that provides a dramatic change like a distortion effector, but it is recommended for those who use multiple effectors, those who are concerned about sound degradation or noise, those who use long cables, and those who want to improve the sound of their effectors. It is basically intended to be connected directly after the guitar and used constantly ON. *This is a piece of equipment where the effect is difficult to understand audibly, so we recommend that only those who have knowledge of buffers purchase it. We make custom-made effectors. Please consult with us for layout changes and function additions. #Centaur #Klon #Buffer