For sale is a Sadowsky onboard preamp for bass. 【Functions】 ・Master Volume ・Balancer ・Tone ・2-band EQ (Bass, Treble) I purchased this item this year, and it appears to be in good condition. There are a few minor scratches on the plate, but in my opinion, they are not very noticeable. Please refrain from purchasing if you are overly concerned about such details. Of course, the item functions without any problems. Thank you for your consideration.