This is an event-exclusive item. I purchased it at an event, but I later bought the standard ADD CBF version and have been using that, so I am selling this one. I have used it a few times at home. The serial number is a single digit. It sounds really good. ↓ From the official website ■ The ultimate overdrive, having researched all Tube Screamers "Serotonin Origin S.T." has a special focus on its components. In particular, the heart of the sound is a special op-amp selected by Susumu Tamura. I, of course, do not know the model number, and this op-amp is also discontinued. However, Mr. Tamura has secured his original sound by stocking tens of thousands of these. In addition, the use of carefully selected components such as Orange Drop coupling capacitors and Amtrans' AMRG, which is responsible for KarDiaN's signature tone, has created a unique sound. And this time, we have also taken on a new challenge in the painting. Some vintage Tube Screamer enclosures use yellow paint as an undercoat, and the green surface of well-used units peels off to reveal the yellow undercoat. We have reproduced the vibrant green and yellow multi-layer on this unit. 45 years have passed since Mr. Susumu Tamura created the legendary pedal. In the 46th year, a new legendary overdrive was created by Mr. Susumu Tamura and Kita of KaDiaN. Please experience the wonderful Origin S.T. sound that lives up to the legend. ■ SPECS ● Input Impedance: 2.2MΩ ● Output Impedance: 10kΩ ● Controls: Volume, Drive, Treble, Bass ● Switching Method: True Bypass ● Connections: 1/4 inch standard phone jack x 2 (input, output) ● Power Supply: 9V center minus DC power supply (battery compatible 9V type 006P type) ● Current Consumption: 10mA ● Dimensions: Width (W) 72 mm, Depth (D) 121 mm, Height (H) 55 mm (including protrusions such as foot switches and jacks) ● Weight: 311g