Ibanez Wiki
For the earlier model with the natural finish, see K5 (2002–2005).
2019 K5 BKF 1P 07.png
K5 Black Flat (more images) Red copyright sprite.png

The K5 is a five string solid body electric bass model introduced by Ibanez for 2006. It is a signature model for bassist Reginald "Fieldy" Arvizu who is best known for his work with the American nu metal band Korn. It was initially made in South Korea, but production moved to Indonesia in 2008.

This version replaced the initial K5, which had a padauk top and back with a natural finish and a different neck.

The K5 features an SR series double-cutaway mahogany body bolted to a maple and bubinga neck with a 24-fret rosewood fingerboard with a K5 logo at the twelfth fret. Components include a pair of Ibanez ADX-5 active bass pickups with a Vari-Mid III preamp with a three-band EQ, a fixed bridge with 16.5mm string spacing and a plastic nut.

For 2011 the hardware color was changed from gold to black and the Black Flat finish was introduced. For 2018 the maple and bubinga neck was replaced with maple and walnut and the rosewood fretboard was replaced with jatoba. For 2019 a nyatoh body was introduced, replacing the mahogany. For 2021 the fretboard material was changed back to rosewood.

The K5WHLTD is a limited edition version with a white finish which was offered in 2014. The K5LTD is a limited edition version with a fluorescent green finish and pink strings which was introduced in 2020.


Specifications for K5
Model name: K5 (2006–2021)
Year(s) produced: 2006–2021
Sold in: Asia & Africa / China / Europe / Japan / North & South America and Oceania / USA
Made in: Korea (2006–2008) / Indonesia (2008–2021)
Finish(es): Black Flat (BKF) 2011–2021/ Transparent Black Flat (TKF) 2006–2010
Body type:
Solid body
Body material:
2006–2018: Mahogany
2019–2021: Nyatoh
Neck joint:
EB-7 fixed (16.5mm string spacing)
Knob style:
Knurled metal dome
Hardware color:
2006–2010: Gold
2011–2021: Black
Neck type:
Neck material:
2006–2017: 5-piece maple/ bubinga
2018–2021: 5-piece maple/ walnut
Scale length:
864mm / 34"
Fingerboard material:
2006–2017: Rosewood
2018–2020: Jatoba
2021: Rosewood
Fingerboard inlays:
K5 logo at 12th fret
24 / medium
Black plastic (45mm)
Machine heads:
Hipshot tuners
Electronics/ Strings
Bridge pickup:
Ibanez ADX-5B active
Neck pickup:
Ibanez ADX-5N active
Vari-Mid III preamp w/ 3-band EQ
Master volume / Stacked bass & treble / Stacked mid boost-cut & mid frequency control / Balancer
Output jack:
¼" stereo barrel (angled face mount)
String gauge (factory):
.045/.065/.085/.105/.130 (D'Addario EXL165 + .130)
Factory tuning:
Portal: SR series | Fieldy series | Signature series | Bass models Models-icon.png


Additional finishes/ details
2007 K5 TKF 1M 02.jpg
Transparent Black Flat
Controls K5.jpg
Controls layout
Vari-Mid III EQ frequency chart.jpg
Preamp frequency responses
2021 K5 BKF 1P 08 front.jpg
Front of body
2021 K5 BKF 1P 08 back.jpg
Rear of body