Product Description This is an effector that uses only the preamp section of the AIWA TP-1011, famous for Ritchie Blackmore, and has had its circuit redesigned for easier use. Due to popular demand, we have produced three additional units. (Please note that the echo effect is not present as only the preamp section is used.) The knobs are: Mic Level (right), Line Level (left), and a Gain knob (center) which was added at the request of a tester who is a Ritchie Blackmore enthusiast. Since the transistors 2SC369, 2SC733, and 2SC372 are discontinued, we are using 2SC945. A user has created videos: https://youtu.be/as2pJoG6nLA https://youtu.be/6KgVXLBzwmI https://youtu.be/3993xhB8maQ It uses a voltage doubler, so a standard 9V adapter or power supply will boost the voltage to 18V. *Please be sure to use 9V. ● Please use a 9V center-negative adapter for power. Batteries cannot be used. ● Uses a φ5mm high-brightness blue LED. ● Features true bypass. ● The aluminum case dimensions are 60 x 112 x 31 (height) mm. ● EBK is a name used only for auctions. In our actual business, we specialize in adjusting and producing equipment such as amplifiers and effectors related to blues, as well as adjusting guitars. We have produced over 4000 units (as of August 6, 2024) and many professional musicians use our products. ● Six-month warranty: We maintain customer records, so if a malfunction occurs during normal use, we will repair it free of charge within six months after verifying with our shipping records. (However, you will be responsible for shipping costs.) ● Price includes shipping. *Please refrain from returns except for initial operational defects. We also have other vacuum tube amplifiers and effectors for sale, so please take a look. ● Please understand that we do not offer discounts.