This is a Boss FV-50L modified by BamBasic Effectribe. ~The circuit board has been removed, and each part is directly connected. Wiring materials that minimize sound quality degradation are used. It has a high degree of transparency and a sound without any quirks, and has been well-received.~ https://bambasic.exblog.jp/30301760/ 1ch (In Out), Tuner Out specifications. The minimum volume is dummy.