Ibanez Wiki
2019 GSRM20B WNF 1P 02 en 1.png
GSRM20B Walnut Flat (more images) Red copyright sprite.png

The GSRM20B is a short scale Soundgear series solid body electric bass model introduced by Ibanez in 2015. It is made in both China and Indonesia as part of the entry level GIO line. Differences exist between the Chinese and Indonesian models as enumerated below; the variants are sold in different markets.

The GSRM20B features a double-cutaway mahogany body bolted to a 28.6" scale maple neck with a 22-fret rosewood fingerboard with white dot position markers. Components include a pair of Ibanez Powersound pickups with a jazz pickup at the bridge and a precision pickup at the neck, a B10 bridge with 19mm string spacing, a plastic nut and Ibanez tuning machines.

For 2017 the Powersound pickups were replaced with Dynamix. For 2018 the rosewood fingerboard was replaced with treated New Zealand pine or Jatoba, depending on the market. For 2019 the body material was changed to okoume. For 2020 the fretboard material was again changed, this time to purpleheart.

The GSRM20 is a similar model with chrome hardware.


Specifications for GSRM20B
Model name: GSRM20B
Year(s) produced: 2015–2021
Sold in: Asia & Africa MIC / China MIC / Europe MIC / North & South America and Oceania MIC / USA MII
Made in: China (2016–2021) / Indonesia (2015–2021)
Finish(es): Brown Sunburst (BS) 2021, MIC only / Walnut Flat (WNF) / Weathered Black (WK)
Body type:
Solid body
Body material:
2015–2018: Mahogany
2019–2021: Okoume MIC or Poplar MII
Neck joint:
B10 (19mm string spacing)
Knob style:
Hardware color:
Neck type:
Neck material:
1-piece maple
Scale length:
726mm / 28.6"
Fingerboard material:
2015–2017: Rosewood
2018–2019: Treated New Zealand pine MIC or Jatoba MII
2020–2021: Purpleheart MIC or Jatoba MII
Fingerboard inlays:
White dot
22 / medium
Plastic (38mm)
Machine heads:
Ibanez die-cast
Electronics/ Strings
Pickup configuration:
Bridge pickup:
2015–2016:Ibanez Powersound J bridge (J) passive
2017–2021: Ibanez Dynamix J bridge (J) passive
Neck pickup:
2015–2016:Ibanez Powersound P neck (P) passive
2017–2021: Ibanez Dynamix P neck (P) passive
Two volume / master tone
Output jack:
¼" stereo barrel (side mounted)
String gauge (factory):
Factory tuning:
1G,2D,3A,4E (E standard)
Portal: miKro series | GIO series | SR series | Bass models Models-icon.png


Additional finishes/ details
2021 GSRM20B BS 2Y 05.png
Brown Sunburst
2019 GSRM20B WK 1P 02.png
Weathered Black
Controls 2VT GSR.jpg
Controls layout
GSRM20 size comparison.jpg
Comparison between miKro and full-size bass