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Ibanez GWB20TH Gary Willis 20th Anniversary 5-String Fretless Bass Guitar

To honor a 20-year working relationship with jazz fusion bassist Gary Willis, Ibanez presents a very special 20th Anniversary limited edition model, the GWB20TH.


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MSRP: Old Price $1,599.99 Discounted Price $1,199.99 Save : $400.00 (25%)
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MSRP: Old Price $1,599.99 Discounted Price $1,199.99 Save : $400.00 (25%)
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The Gary Willis Signature model was first introduced in 1999. In honor of its 20th anniversary, Ibanez presents the GWB20TH. The GWB20TH is quite a departure from the standard Gary Willis signature model. Certain features, such as the fretless ebony fingerboard, the finger ramp, and custom shaped tuning machines, still remain. What makes this anniversary model special is a basswood body with an ash top, a flat Tequila Sunrise finish, and Aguilar electronics. This is a major instrument designed to honor a major milestone.

Basswood Body with an Ash Top
Unlike previous Gary Willis signature models, the Ibanez GWB20TH features a basswood body with an ash top. This combination produces a sparkling high-end and an overall balanced tone. Matched with a 3-piece maple neck and ebony fingerboard, you end up with a very resonant bass with a tight low-end and mid-range, impressive high-end attack, and great sustain.

Flat Tequila Sunrise Finish
Introduced specifically for the GWB20TH, the new flat Tequila Sunrise finish is a real sight for sore eyes. You’ll find this finish not just on the body, but on the finger ramp and headstock as well, making for one classy looking instrument. This finish has not been seen on any previous Gary Willis signature model, but it is sure to be an instant classic.

Aguilar Electronics
To celebrate the long relationship between Gary Willis and Aguilar, the Ibanez GWB20TH features an Aguilar DCB bridge pickup, guaranteeing outstanding dynamics and rich tone. Also featured is the Aguilar OBP-2 2-band EQ system which includes a volume control as well as treble and bass controls via a concentric pot, so fans of previous Gary Willis signature models need not worry. Different electronics, same control layout.


  • Basswood Body with an Ash Top
  • Flat Tequila Sunrise Finish
  • GWB 3-Piece Maple Neck
  • Custom Tuning Machines
  • Ebony Fingerboard with Off-Set White Dot Inlays
  • Fretless with White Inlaid Fret Line Markers
  • Aguilar DCB Bridge Pickup
  • Aguilar OBP-2 2-Band EQ
  • Case Not Included

Get your Ibanez GWB20TH Gary Willis 20th Anniversary 5-String Fretless Bass Guitar today at the guaranteed lowest price from Sam Ash with our 45-day return and 60 day price protection policy.

Things You Will Get:

  • 5-String Fretless Bass Guitar


by PowerReviews
Number Of Frets Fretless
Scale Length 34"
Nut Width 45mm
Neck Shape GWB
Fingerboard Radius 305mmR
Body Style Double Cutaway
Neck Type Bolt On
Neck Wood 3-Piece Maple
Fingerboard Ebony
Body Wood Basswood
Top Ash
Pickup Configuration H
Bridge Pickup Aguilar® DCB
Bridge Type Standard
Tuning Machines Custom Gotoh
Orientation Right-Handed
Case/Bag Included No
Series GWB
Model GWB20TH
Warranty Info:

The manufacturer's warranty covers parts for one year and labor for one year from date of purchase. The warranty excludes damage from misuse, abuse, and contains other exclusions.

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