ADDAC System Fortifies its Four String Series with Three New Additions, Expanding Sonic Palette for Musicians Bass Headstock and Bridge, Frets, and Resonator expand tactile interaction possibilities with ADDAC Four String Series Lisbon, Portugal-October 14, 2026 — ADDAC System announces a significant creative fortification to Four String Series: ADDAC120B Bass Headstock & Bridge, ADDAC128 Frets (including ADDAC128M Microtonal Frets), and ADAC129 Resonator. The Four String Series, introduced in June of this year, is open canvas for users to explore and engage with physical strings from various perspectives, promoting creative experimentation. All three of the new modules are available now through ADDAC System and its authorized resellers.
Lisbon, Portugal-October 14, 2026 — ADDAC System announces a significant creative fortification to Four String Series: ADDAC120B Bass Headstock & Bridge, ADDAC128 Frets (including ADDAC128M Microtonal Frets), and ADAC129 Resonator. The Four String Series, introduced in June of this year, is open canvas for users to explore and engage with physical strings from various perspectives, promoting creative experimentation. All three of the new modules are available now through ADDAC System and its authorized resellers.
String up the Low End with ADDAC Bass Headstock & Bridge Adding to the guitar headstock announced in June, this is the base of the ADDAC String modules, covering low frequency territory. The product consists of headstock and bridge modules, allowing for string gauges up to.110. Strings are installed just like they woud be on a traditional guitar—users are free to choose whichever strings to install and what tuning to use. The headstock features 4 bass tuners, and both module panels use 2mm stainless steel for strength.
A fretted position on the Eurorack The ADDAC128 Frets and Microtonal modules are able to create a fretted position anywhere on the frame; its placement requires a tuner to get it to the right position for the intended pitch, and several modules can be placed for more notes. The height of each module is calibrated using the 2 screws on the front.
To avoid any buzzing, each fret needs to be set slightly lower then the previous one. Once the order and heights are set the first time, users should keep the same order for next the next uses as the plastic may slightly deform and not recover from it’s first setup—the product comes with labeling circles for this purpose.
For more information, visit addacsystem.com.
