A Trans-System preamp has been installed on James' acoustic guitar. Original arabesque patterns and a pickguard have been applied. Leaf-shaped monitor holes have been added to the side so that the effects sounds reach the player directly. Neck, nut, and saddle adjustments have been made. Fret leveling has been done to make it easy to play with a low string height. And the DOUBLE OS1 is installed. The conventional wisdom of acoustic guitars will change. ⭕️Search for DOUBLE S1 OS1 on Youtube 【Preamp】 ⭕️Trans function: The condenser microphone and piezo pickup pick up the vibrations of the guitar and strings, apply effects with the preamp, and send the signal to the actuator (vibrator) installed on the back plate, making the body resonate. The mechanism is that the acoustic sound and the sound with effects are mixed and come out of the guitar. You can enjoy the effect sound from the sound hole without connecting anything. You can also connect to a guitar amplifier with a 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 be connected 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. ⭕️The power source is a rechargeable battery with a C-terminal cable charging. 【Features】 Bright sound quality with good sustain, effective for fingerpicking. Strumming also feels good. The bass sound is a little subdued, but the volume is comparable to a dreadnought. 【Specifications】 ◎ Top: Spruce solid top ◎ Neck: Mahogany ◎ Sides, Back: Mahogany ◎ Fingerboard, Bridge: Rosewood ◎ Nut, Saddle: Crystal Tone Hard Fiber ◎ Gloss finish ◎ Pegs: Chromatic Silver Shiny and the tuning is extremely stable. ◎ Scale: Approximately 640mm ◎ Nut width: Approximately 42mm ◎ Preamp: DOUBLE S1 OS1 【Condition】 ◎ Body: Beautiful condition with no noticeable scratches or dents ◎ Neck: Adjusted to 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 【Accessories】 Preamp charging cable and instruction manual