Alder Body & Rosewood Fingerboard 60’s Style WOODLINE Model!【Bacchus JT Series】

The Japan Tune-up series, renowned for its final setup by Japanese specialists, introduces new models inspired by vintage 60s basses: the -WL604-RSM/R- and -WL605AC-RSM/R-. These instruments feature not only traditional elements but also meticulous updates tailored to the demands of today’s music scene.
Top-tier specifications that any bass player would love
Alder body

The body utilizes North American alder wood, offering the ideal weight and acoustic properties for an electric bass. It delivers an excellent sound in the midrange, and its flat tone with minimal coloration is also a key feature for easy sound shaping.
Rosewood fingerboard × Roasted maple neck


The JT Series introduces its first model featuring a rosewood fingerboard paired with a roasted maple neck. Compared to maple, rosewood excels at producing rich low-mids. While maple and rosewood are a classic combination, the use of roasted maple gives this model a more vintage sound reminiscent of aged guitars, even when still brand new.
Player-Focused Update
WOODLINE shape

Featuring a slightly slimmer, downsized body inherited from the flagship “WOODLINE” family of the Handmade Series. Please experience its excellent fit to the body if you ever have the chance!
Brass Neckplate

Features a brass neck plate engraved with the Bacchus logo. Being heavier than that of previous models, it contributes to ideal mid-to-low frequency output.
Newly Adjusted Metallic Colors

Introducing a new color lineup featuring metallic colors. We aimed for modern colors that complement any musical genre.
5-string model equipped with an active circuit


The 5-string model “WL605AC-RSM/R” features the active circuit common to the Japan Tune-up series. Its simple configuration includes a 2-band EQ (treble and mid) and a balancer, supporting detailed sound shaping during performance. A dedicated battery compartment is located on the back of the body, allowing for easy replacement of the 9V battery.
Today’s Models

Model:WL604-RSM/R
Colors:ABRM, IBM, PWH
MSRP:JPY 130,000 (w/o taxes)

Model:WL605AC-RSM/R
Colors:ABRM, IBM, PWH
MSRP:JPY 150,000 (w/o taxes)