A trans-system preamp has been installed on James' acoustic guitar. The soundhole has been shaped into an onigiri (rice ball) form. A wood-grain rosette has been applied for a unique look. The position markers are also wood-grain blocks, similar to the rosette... Neck, nut, and saddle adjustments, as well as fret leveling, have been performed. The action has been adjusted for easy playing with low string height. And the DOUBLE OS1 is installed. This will change the conventional wisdom of acoustic guitars. ⭕️Search for DOUBLE S1 OS1 on Youtube. It's more powerful than Yamaha's. 【Preamp】 ⭕️Trans Function: The condenser microphone and piezo pickup pick up the vibrations of the guitar and strings, and the preamp applies effects. The signal is then sent to an actuator (vibrator) installed on the back plate, which vibrates the body. The natural sound and the sound with effects are mixed and come out of the guitar. You can enjoy the effect sound from the soundhole without any connection. You can also connect to a guitar amp via line out and play it as a regular electric-acoustic guitar. ⭕️Effects: Microphone blend, delay, chorus, and reverb can all be applied simultaneously. ⭕️AUX: A function not found in other preamps. It can connect via Bluetooth, allowing you to import sound sources from an iPhone, etc., and play along with them. ※ You can also enjoy music as a Bluetooth speaker by hanging the guitar on the wall. ⭕️Power is a rechargeable battery with a C-terminal cable for charging. 【Features】 Bright sound quality with good sustain, comfortable for fingerpicking and strumming. 【Specifications】 ◎ Top: Spruce solid top ◎ Neck: Mahogany ◎ Sides and Back: Mahogany ◎ Fingerboard and Bridge: Rosewood ◎ Nut and Saddle: Crystal Tone Hard Fiber ◎ Dark navy gloss finish ◎ Pegs: Chromatic silver Shiny and with very stable tuning ◎ Scale: Approximately 640mm ◎ Nut width: Approximately 42mm ◎ Preamp: DOUBLE S1 OS1 【Condition】 ◎ Body: Beautiful condition with no noticeable scratches or dents. ◎ Neck: Adjusted with a slight forward bow to match string vibration. ◎ Truss rod: Plenty of room. ◎ Frets: Almost no wear. Leveled and polished. ◎ Pegs: Shiny ◎ String height: Approximately 2.5mm on the 6th string and approximately 2.0mm on the 1st string at the 12th fret. The strings are also new, so you can start playing immediately upon arrival. 【Accessories】 James-specific gig bag. Preamp charging cable and instruction manual.