Multifunctional bass preamp with adjustable effect balance. - Model Name: DPA-2B - Brand Name: Crews Maniac Sound Thank you for viewing. This is a bass preamp by Crews Maniac Sound, a brand highly popular as a domestic guitar manufacturer. This unit, equipped with a discrete circuit, outputs a thick and clear sound. It features a very natural sound quality that doesn't compromise the original sound of the bass, and also allows for a wide range of sound creation with a 3-band EQ including MID FRQ. The biggest feature is the variety of input/output terminals and footswitches. It is equipped with a tuner out and send/return terminals, and each terminal can be turned on and off with a footswitch. For bassists with a simple setup, this single unit can control the entire effects board. In addition, it has two input terminals, and the level of each channel can be adjusted individually. Since channel switching can also be done with an external footswitch, it is useful when you want to use different basses with different output levels. It also has a headphone jack, making it versatile and adaptable for various settings and environments. It is an all-around unit that can function not only as a preamp but also as a switcher. It is powered by 15V, and a compatible adapter is included. It is a used item that has been purchased some time ago, but it is considered to be relatively clean. Please understand that it is not a beautiful item like new. Returns and exchanges are not accepted, and please refrain from purchasing if you are sensitive to such matters.