I installed a TransAcoustic preamp on James' acoustic guitar. It outputs a more powerful and louder volume than a Yamaha TransAcoustic guitar. Mini-concerts are possible without a guitar amp in a small room. Neck, nut, and saddle adjustments have been made. The frets have been leveled for easy playing with a low string height. And it's equipped with DOUBLE OS1. The conventional wisdom of acoustic guitars will change. ⭕️Search for DOUBLE S1 OS1 on Youtube. 【Preamp】 ⭕️TransAcoustic 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 the actuator (vibrator) installed on the back plate, making the body resonate. 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 it to a guitar amp via line out and play it as a regular electric-acoustic guitar. ⭕️Effects: You can apply mic blend, delay, chorus, and reverb all at the same time. ⭕️AUX: A function not found in other preamps. You can connect via Bluetooth and import audio from an iPhone, etc., and play along with it. ※ You can also enjoy music as a Bluetooth speaker by hanging the guitar on the wall. ⭕️The power source is a rechargeable battery, charged with a C-type cable. 【Features】 Bright sound with good sustain, effective for fingerpicking. Strumming is also well-defined. The bass sound is a little subdued, but the volume is comparable to a dreadnought. 【Specifications】 ◎ Top: Solid Spruce ◎ Neck: Mahogany ◎ Sides, Back: Mahogany ◎ Fingerboard, Bridge: Rosewood ◎ Nut, Saddle: Crystal Tone Hard Fiber ◎ Gloss Finish ◎ Pegs: Chromatic Silver Shiny and the tuning is very stable. ◎ Scale: Approximately 640mm ◎ Nut Width: Approximately 42mm ◎ Preamp: DOUBLE S1 OS1 【Condition】 ◎ Body: Small dents on the top under the bridge and on the side. ◎ Neck: Adjusted with a slight forward bow to match the 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 James original soft case