◎ Organizing equipment. A new TransAcoustic System preamp has been installed on a Legend acoustic guitar. It has a bone saddle, an original pickguard, and a soundhole cover. 【Adjustments】 Neck, nut, and saddle adjustments. Fret leveling for easy playing with low string height. And equipped with DOUBLE OS1. This will change the common sense of acoustic guitars. ⭕️ Search for DOUBLE S1 OS1 on Youtube. 【Preamp】 ⭕️ TransAcoustic function: 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 sound of 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 connection. Also, you can connect to a guitar amplifier with a line out and play it as a normal 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. ⭕️ Power is a rechargeable battery with a C-terminal cable charging. 【Features】 Easy-to-handle folk type. Replaced with a bone saddle for a clear and vibrant sound quality. Fingerpicking and strumming are also comfortable with the natural effects. 【Specifications】 ◎ Top: Spruce ◎ Neck: Catalpa ◎ Sides, Back: Agathis ◎ Fingerboard. Bridge: Rosewood ⭕️ Saddle: Replaced with bone ◎ Gloss finish ◎ Pegs: Rotomatic silver ◎ Overall length: Approximately 1010 mm ◎ Overall width: Approximately 370 mm ◎ Body thickness: Approximately 90-100 mm ◎ Scale: Approximately 640 mm ◎ Nut width: Approximately 42 mm ◎ Preamp: DOUBLE S1 OS1 【Condition】 ◎ Body: Like new. ◎ Frets: No wear. Leveling and polishing ◎ Neck: Adjusted to a slight forward bow to match the string vibration. Barre chords are also easy. ◎ Truss rod: Plenty of room on both sides. ◎ String height: Approximately 2.4 mm on the 6th string and approximately 2.0 mm on the 1st string at the 12th fret. You can enjoy playing immediately after arrival. 【Accessories】 Preamp instruction manual and charging cable